RIVER OTTER ENVIRONMENTAL STUDY - 1993/94...

N)LA - - T o v T H U & S 7

NATIONAL RIVERS AUTHORITY SOUTH W ESTERN REGION

RIVER OTTER ENVIRONMENTAL STUDY - 1993/94

CONSULTANTS REPORT : RIVER OTTER :ENVIRONMENTAL DATA REVIEW

W S Atkins February 1994

Volume 4 : Appendices

NRANational Rivers Authority

South West Region

WS Atkins Water document control sheetb (S vision of WS Atkins Coos iJ Ian is UmiiedKings Wharf The Quay Exeter EX2 4AN

client: National Rivers Authority

Project: River Otter Environmental Data Review

mie ENVIRONMENTAL DATA REVIEW

Date February 1994

VOLUME 4 : APPENDICES

L C e > P y

2 - S 2

COPY NO: v W i

COPY HOLDER: N R A

2 Final Draft I ? rs r i £).u r*yk%- i%jo5/q<f.1 Draft J Wright H Westbrook - ■ 15/2/94

Revision Purpose Originated Checked Reviewed Authorized Date

ENVIRONMENT AGENCY

(ref: K1512.C01/R4-007. rev 2. p

River Otter - Environmental Data Review National Rivers Authority

CONTENTS

Page No.

List of Figures (iii)

List of Tables (Vi)

List of Appendices (Vi)

0. Summary VOLUME 1 0-1

1. Introduction VOLUME 2 1-1

2. Methodology 2-1

2.1 Introduction 2-12.2 Hydrology Data 2-12.3 Water Quality Data 2-12.4 Aquatic Invertebrate Data 2-22.5 Aquatic Plant Data 2-22.6 Fisheries Data 2-22.7 Other Data 2-2

3. Results 3-1

3.1 Hydrology 3-13.2 Water Quality 3-233.3 Aquatic Invertebrate Biology 3-303.4 Aquatic Plant Data 3-333.5 Fisheries 3-353.6 Sedimentation 3-373.7 Eutrophication 3-383.8 Drainage Patterns 3-393.9 Summary of Change 3-40

4. Conclusions and Recommendations 4-1

4.1 Hydrology 4-1. 4.2. Water Quality . 4-6

4.3 Aquatic Invertebrate Data 4-94.4 Aquatic Plant Data 4-94.5 Fisheries 4-104.6 Sedimentation 4-104.7 Eutrophication 4-104.8 Drainage Patterns 4-114.9. Changes 4-11

Figures )Tables )Appendices VOLUME 4

VOLUME 3

(ref: K1512.C 01/R 4-007. rev 2. printed 18 Feb 94) jj B E 2 E 2 E


List of Appendices

Appendix A Appendix B Appendix C Appendix Appendix Appendix Appendix Appendix H Appendix I Appendix J Appendix K

Appendix L

QuestionnaireData Sources for River Otter Environmental Data ReviewWater Quality Sampling Sites and Parameters AvailableList of Hydrological Monitoring Sites and Available DataWater Resources Planners ReportNotes of Hydrology MethodologyWater Resources Planners NoteElectrofishing Data 1983 - 1992Summary of Trends in Stocking and CroppingSSSI Designations in the River Otter CatchmentList of Possible Causes and Effects raised by the River OtterAssociationRiver and Ground Water Levels

(ref: K1512.C01/R4-007. rev 2. printed 18 Feb 94) v j W J c f / iV X f i fc


APPENDICES

(ref. K1512.C 01/R 4-007. rev 2. printed 18 Feb 94)


APPENDIX A Questionnaire

(ref: K1512.C01/R4-007. rev 2, printed 18 Feb 94) M E E T f f l f ig

River Otter - Environmental Data Review’ National Rivers Authority

RIVER OTTER DATA REVIEW QUESTIONNAIRE

1. Please enter your name, address and telephone number:

2. Do you have evidence, photographic or written, that is in addition to that already held by the NRA on thefollow ing issues:

a) Fisheries/Fishing YES / NO.b) W ater Quality • YES / NOc) Aquatic Biology YES i NOd) Ecology YES / NOe) Abstraction YES / NOf) G roundwater Level YES / NOg) River Flows, Velocity and Stage YES / NOh) Sedim entation YES / NOi) Eutrophication YES 1 NOj) Drainage Regimes YES / NOPlease enclose evidence that is additional to that already held by the NRA with this questionnaire. Please ensure that your name and address is clearly written on evidence so it can be returned.

3 Do you have evidence, photographic or written, that is in addition to that already held by the NRA on thefollow ing issues:

a) Pollution Incidents YES / NOb) Outfalls YES / NOc) Abstractions YES / NOd) Flood Frequency YES / NOe) Changes in Erosion/Sedimentation Regime YES / NO0 Changes in Recreational Usage YES / NOg) Changes to Spawning Grounds1 YES / NOh) C hanges.in Land Usage YES / NOi) Changes' in Water Courses and Natural Standing Water

other than River Otter YES / NOj) Tree d ie -back ' YES / NOk) Aquatic Plant Growth YES / NO

continued/..2

(ref: K 1S12.C01/R4-007. rev 2. printed 18 Feb 94)


.72

Please ensure evidence that is additional to that already held, by the NRA is enclosed with this questionnaire. Please ensure your name is clearly written on evidence so it can be returned. If the data is substantial please contact the undersigned to make suitable arrangements.

Please return to: Dr J M WrightWS Atkins Curzon House Southernhay West EXETER EX1 1JG

Tel: (0392) 423000

(ref: K1512.C01/R4-007. rev 2. printed 18 Feb 94)


APPENDIX BData Sources For RiveKOtter Environment Data Review

(ret: K1512.C 01/R 4-007. rev 2, printed 18 Feb 94)


APPENDIX B

Data sources for River Otter. Environmental Data Review

Biology Data

from NRA Archive

From NRA Files

From River Otter Association

Water Quality Data

From NRA Archive

Routine biological monitoring results for Otter catchment 1990-92.

Historical biological survey results for Otter catchment. 1968-89;Historical biological survey results for Axe Catchment 1968-93;Phase I Habitat Survey, NRA 1983 Aerial Photographic Survey, NRA 1992 Comparative rod catches for salmon and sea trout 1966-92;Trout densities for River Otter 1983-92;Fisheries survey of the River Otter 1978 - Technical Report;Fisheries survey of River Otter at Newton Poppleford - date unknown.

Report on decline of the River Otter;Fisheries data for Honiton.

Routine monitoring data for Otter catchment 1974-93; Effluent and discharge impact assessment data 1974- 93;Routine monitoring data for Axe Catchment 1974-93.

1. The Otter Valley Catchment Study, Vol 3, Executive Report, draft final Report August 1989.

2. . The Otter Valley Catchment Study, Vol 3, Landuse & Farming Practices, draft Final,August 1989.

3. The Otter Valley Catchment Study, Vol 5, Environmental Studies, draft Final, August 1989. ‘ ,

4. Otter Valley Catchment Study. Report on Test Pumping carried out at Greatwell and Dotton, April 1989.

5. ’Study of 1989 Drought in SW England' Halcrow. Draft Report, Vol l . m a i n report {March 1990). Vol 2 (annexes)..

6. Groundwater Report no. N410C, March 1990. Marcus Hodges Environmental.

7. New Agricultural Landscapes 1974, Countryside Commission.

(ref: K1512.C01/R4-007, rev 2. printed 18 Feb 94)


8. . A Second Look 1984, Countryside Commission.

9. Water Resource Development in East Devon, The Otter Valley Catchment Study, vol 2, Resource Modelling. MRM Final Draft Report August 1989.

Available-Aquatic Invertaebrate Data:

1968: - Laboratory sorting (biological audit samples). Numbers of individual species.

1973: - Laboratory sorting (biological audit samples). Numbers of individual species.

Field sheets showing abundance of main families.

1977: - Field data showing abundance of individual species.

1978: - Field data showing abundance of main families/groups.

1979: - Laboratory sorting (biological audit samples) giving numbers of individual species.

Field data showing abundance of main families/groups.f


Field data showing abundance of main families/groups.

1981: - Laboratory'sorting (biological audit samples) giving numbers of individual species.







1990: - Laboratory sorting giving abundance of main groups.



(ref: K1512 .C 01 /R 4-007, rev 2. printed 18 Feb 94) WS/Atkh


The abundance scale used for the 1990-1992 samples collected using a 3 minute kick and1 minute search is as follows:

1 = 1 - 9 individuals2 1 0 - 9 9 individuals3 = 100 - 999 individuals4* = 1000 - 9999 individuals5 = 10,000+ individuals

Between 1978 and 1989 invertebrate samples were taken by 2 minute kick with older surveys using a 5 minute kick; the abundance scale used is not recorded on the information provided.

Biologists in the NRA (pers com.) indicate that kick samples prior to 1990 were recorded using the following scale:

I - 2 = Rare 3 - 1 0 = OccasionalI I - 1 0 0 = Common 101+ = ■ Abundant

The older records using Chandler's Biotic Score and the Trent Biotic Index presumably usedChandler's definition of frequency ie. number of individuals in a 5 minute 0.1 m2 sample:-

1 - 2 = Present/Rare3 - 1 0 = Occasional11 - 50 = Common5 1 - 1 0 0 = Abundant >100 = Very abundant

(ref: K1512.C01/R4-007, rev 2. printed 18 Feb 94) m


APPENDIX C

Water Quality Sampling Sites and Parameters available

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(ref: K15 1 2 .0 0 1 ,^4 -0 0 7 . rev 2. printed 18 Feb 94)

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APPENDIX D List of Hydrological Monitoring Sites and Available Data

(ref: K1512.C01/R4-007. rev 2. printed 18 Feb 94)

List of Available Information for O tter Environmental Data Review

G roundw ater Sites

Station Name HIPS No. Archive Start Pate

Alfington N o.l SY19 G048 1.11.71

‘ Alfington ' No.2 SY19 G049 1.12.73 .

Berry House SY19 GOOl 1.2.66

Bicton N o.l SY08 G149 9.4.81

Bicton N o.3 SY08 G153 19.5.83

Burrow S Y08 GO 16 1.1.69

Canterbury Green SY08 G062 20.6.67

Colaton Raleigh 2A. SY08 G031 1.4.71

Colaton Raleigh 4A. SY08 G030 1.1.68

Dotton No.6. SY08G122 1.1.69

East Budleigh N o.l SY08 G142 16.1.79

East Budleigh No.4 SY08 G154 9.5.83

East Budleigh No.5 SY08 G155 6.4.83

Feniton Court SY19 G052 , 1.12.70

Greatwell No.5A SY19 G059 4.2.77'

Greatwell ■ N o.8 SY19 G063 9.4.73

Greatwell N o.9 SY19 G064 9.4.73

Harpford N o.l SY09 G098 13.9.71

Harpford . No.2 SY09 G173 8.11.71

Woodleys N o.l SY09 G095 > 3.1.66 -

Harpford No.9A SY09 G102 1.1.76

Hayes Wood SY08 G033 12.7.67

Heathlands SY09 G021 1.11.50

Higher Pitt Cottage SY09 G099 2.7’.69

Highercombe * SY19 G044 3:1.66

Houghton Farm No.2 SY08 G144 1.1.80

Kersbrook N o.l A SY08 G138 .6 .5 .8 3

Kersbrook N o.IB SY08 G139 29.3.83

Kingston Farm SY08 G021 4.3.66

Station Name HIPS No. Archive Start Date

Lancercombe * SY09 G088 3.1.66

Longmead SY09 G040 2.1.69

Northmostown No.4 SY08 G077 28.5.73

Otterton No.2 SY08 G150 2.6.83

Otterton No. 3 SY08 G151 2.6.83

Otterton No.4 SY08 G152 14.6.83

Passaford Farm SY08 G026 11.7.69

Salston Cottages SY09 G100 1.5.69

Sunnyside Farm ST10 GOOl 28.2.66

Tidwell Farm SY08 G034 21.6.67

Tidwell No.l SY08 G146 1.8.79

Two Ave GY 19 G065 7.9.60

Warren House SY08 G081 3.1.66

Wiggaton No.4 SY09 G054 3.1.66

Woodbury Common No.2 SY08 G065 30.11.67

Rainfall Sites

Churchingford, 0 RF353907 1.9.78

Upottery, Yew Tree RF353965 1.1:83

Honiton,Rosemount C RF354167 1.12.86

Honiton, C. Castle RF354170 ’ 1.8.57

Feniton Court RF354295 1.1.31

Ottery St. Mary. ' G. RF354492 / 1.7.56

Ottery St. Mary'. K.S. RF354497 1.1.50 '

Dotton Pumping Station RF354658 1.5.63

Bicton Huse,.A.C. RF354697 1.11.80

Kersbrook RF354778 1.1.69

Exmouth, Capel Lane RF354864 1.1.10

Exmouth, The Maries RF354895 1.9.71

Surface Flow Sites

Station Name HIPS No. Archive Start Date

Dotton

Fairmile

Fenny Bridges

Goosemoor

Pophams Farm

Riggles Farm

Salston

Stowford

Yalham Farm

Whitford

SY08 F055

SY09 F073

SY19 F052

SY08 F053

SY08 F051

ST10 F041

SY09 F051

SY08 F052

ST21 F003

SY29 F052

1973 (Otter)

1978 (Tale)

1974 (Otter)

1976 (Back Brook)

1973 (Colaton Stream)

1973 (Trib to Otter)

1976 (West Hill Stream)

1973 (Colaton Stream)

1973 (Trib to Culm)

1990 (R. Axe)

■r.

%

t\

OTTER CATCHMENT 4A f,

NO REFERENCE NGR4 B (1) (cont)

LOCATION ADDITIONAL DETAILS[GROUND WATER ABSTRACTION SITES1(1000.0 - 9999. 9 cubic metres per day)1 01/0414 SYll 4 09550 Greatwell.4B

BoreholeSouth West Wa te r Services Ltd

2a 01/0425* ' SY06108 320 Tidwell & South West Wate r Se rvi ces Ltd2b 01/0425 . ’ SY064 08 300 Kersbrook Springs3a 01/04 26 SYll009550 Greatwell

Borehole NolSouth West Wa te r Services Ltd

3b 01/0426 SYl0909550 Greatwell Borehole No2 ''

South West Wa ter Se rvi ces Ltd3c 01/0426 SYl0809550 Greatwell

Borehole No3South West Wate r Se rvices Ltd

4a 01/0478 SY07008770 /Xolaton Raleigh Borehole No2

South West Water Services Ltd4b 01/0478 SY07508790 . Colaton Raleigh

Borehole No4 'South West Wate r Services Ltd

5 01/0505 SYll009 510 Grea twell Borehole No5

South West Wate r Se rvices Ltd6a 01/0518 SY09109100 Harpford

Borehole No5South West Wa te r Services Ltd

6b 01/0516 SY09109080 Harpford Borehole No6

South West Wa te r Services Ltd6 c ■ 01/0518 SY09109060 Harpford

Borehole No7 ✓South West Wa t e r Services Ltd

6d 01/0516 SY09309080 Harpford Borehole No8

South West, Wa te r Services Ltd6e 01/0516 SY09309040 Ha rpford

Borehole No9PSouth West Wate r Services Ltd

7a 01/0520 SY08508880 DottonBorehole No4

South West Water Services Ltd7b 01/0520 SY08708910 Dotton

Borehole No5South West Wa te r Services Ltd

8 01/052? SY07808270 South Farm, Indust r i al Processing: Food &Ot t e r ton Drink

Spray Irrigation ( Sumine r )9a 01/0544 SY08308440 Ott e r ton

Borehole NolASouth West Water Servi ces Ltd

9b 01/0544 SY07808460 ■ Otterton South West Wate r Services LtdBorehole No4

GROUND WATE R ABSTRACTION SITES(10000.0 - 99599999.9 cubic metres per day)la 01/0519 SY08 3 0882 0 Dotton

Borehole NolSouth West Wate r Se rvices Ltd

lb 01/0519 SY08208820 DottonBorehole No2

South West Wa te r Services Ltdlc 01/0519 SY08408830 Dotton South We s t Wate r S.e rvi ces Ltd

Borehole No3Id 01/0519 SY07908800 Dctton

Borehole No7South We st Water Services Ltd

OTTER CATCHMENT 4A & 4B (1) (cont)NO REFERENCE NGR LOCATION ADDITIONAL DETAILSGROUND WATER ABSTRACTION SITES (20.0 - 999.9 cubic metres per day)

m01/0041 ST11000550

2 01/0063 • SY06209490

m 3 01/0104 STl120 069 04 01/0229 STl860 09 50

m 5 01/0308 SY07 509 59 0

n 6 01/0311 STl4800010

* 7 01/0334 SY1Q10962 0

«8 01/0344 X STl8400920

9 01/367 ST20400970

R 10 01/0 3 7 3 SY08008910

« ri 01/0417 STl51002 4 0

a12 01/043b SY041087 6*0

9 13 01/04 4 3. ST091002001 14 01/0472 STl02 096 50

1 15 01/0530 ' SY07 609 510

i 16 01/0537 SY0650895017 01/0556 ST2 2 6008 50

I

1

18 01/0551' ST09100200

1

\RA South West/February 1993

Agriculture

Industrial Processing : Quar ryin

Lane'End Farm,Broadhembury, ’ .Honi tonRockbeare Hill Quarry, Rockbeare Droughtwell Farm, Agriculture Sheldon, Honiton ChapeliVayes Farm, Agriculture Upottery, Honiton Cadhay House, AgricultureCadhay Barton and Private: Domestic.1 & 2 CadhayBungalows, Ottery St MaryRoebuck Farm and AgricultureEast Devon Dairies, Industrial Processing:Honiton Food & DrinkWoodcote Farm, AgricultureOttery St Mary Spray I r rigat i on .'( Summer )Higgles Farm and AgricultureCaravan site, Private: Hoi iday/Recreiat ionUpotteryMoonhayes Farm AgricultureUpottery Agriculture Water PowerOwls Hatch, Agriculturewarren House Private: Domesticand Ely Bungalow, Spray Irrigation (Summer)Newton Poppleford AgricultureSt Cyres Spring South West Water Services Ltd Eicton House and Agriculture4.other propertiesPrivate: Domestic/Miseellaneou Bicton Spray Irrigation (Summer &

Winter )Slade Barton, AgriculturePayhemburyOtter Nurseries, Spray Irrigation (Summer) Ottery St MaryTaylor Catering Spray Irrigation (Summer) Foods, Exeter Road,Ottery St MaryHillside', Newton Spray Irrigation (Summer) PopplefordNewcott Farm AgricultureUpottery'Slade Barton . Agriculture Payhembu ry

OTTER CATCHMENT 4A & 4B (1 )NO REFERENCE NGR LOCATION ADDITIONAL DETAILS

SURFACE WATER ABSTRACTION SITES ' (20.0 - 999.9 cubic metres per day)

r

r

r

M

1 01/0335 SYl01096102 01/0391 SYl05097 4 0-

SYl000968 03 01/0392 SY09809700-

SYl02097 504 01/0433 SY052086805 01/0 4 87 SY07108 3006 01/0515 SY09409360-

SY0910 9 3107 01/0536 SY07 4 097308 01/0528 SY07808500-

SY076084009 01/0533 SY07309190

SURFACE WATER ABSTRACTION S'.(1000.0 - 99 99.9 cubic metrila 01/0389 SY06908610 'lb 01/0389 SY07108610lc 01 '0 3 89 SY07 7 08 550Id 01/0369 SY07708540-

SY07908 5702a 01/0422 SY037085702b 01/0422 SYO 3908 5 9 02c 01/0422 ‘ SY039083903 01 / 0 ‘i 6 4 STl56001104 ; 01/0 4 94 /..-• -^>£Y073084105 01/0516 SY07 508.43 0-

Ottery St Mary Woodford Bartoj Gosford Road, Ottery St Mary Gosford Pines, Gosford,Ottery St Mary Selwoods Leat, Bicton South Farm, OttertonFarm, Tipton Vale, Ottery St Mary Escot Estate,Talaton

Spray Irrigation (Summer) Agriculture

Spray Irrigation (Summer)

Private: Amenity FountainsSpray Irrigation (Summer)Spray Irrigation (Summer)

Halls Farm, Ottery St Mary

Pi sci cultur eSpray Irrigation (Summer) Spray Irrigation (Summer)

SV07108300 Budleigh RoadSURFACE. WATER ABSTRACTION SITES (10000.0 - 99999999.9 cubic metres per day)1 01/0002 -"2 01/04 4 0 ^

3 01/04 64

College and Colaton Ralei gh

Yettington Intake South West Water Services i Yettington Intake Squabmoor Reservoir Tracey Mill,Tracey, Honiton Budleigh Brook Intake

Spray Irrigation (Summer

Pisci cultureSouth West water Services L

Wessex Water PLCST226013 0 0 Otterhead(Royston Water)

SY09109260 46 Tipton St John Industrial Processing: Wate Sidmouth Power

SY09509610 The Mill Stream, Private: Amenity Leat •Ottery St Mary

<yv ^Ke/- TcKi fÔl*^)^7r

OTTER VALLEY ENVIRONMENTAL DATA REVIEW Terms of reference - DRAFT 1 Available data

The following is not a comprehensivie inventory of available data and should be treated as a first draft. _

1. Time series (measured data)

* rainfall from raingauges

Raingauge information outside, of Otter and Axe catchments is available and may be required for aerially averaging rainfall.

Otter <current) - Churchingford, Ostlers (ST 2130 1250). 01.9.78-present. Station ref RF3S3907.

Upottery, Yew Tree (ST 2070 0890). 1. i. 83- present . Station ref RF353965.

Hon i ton, Rosemount Cross 'ST 1580 0000). 1.12.8':' - present. Station ref RF354I67.

Honiton, Copper Castle ( ST 1710 0040). 1.8.-7 present. Station ref RF354]~0.

Feniton Court (SY 1090 9940). 1.1.31 - present. Station ref RF354295.

Ottery- St Mary, Greatwell ' SY 1100 9550). 1.7.56- present . Station ref F.F354492.

Ottery St Mary, Kings School (SY 0900 9530!. 1.1.50 - presentStation refRF354497.

Dotton Pumping Station (SY 0830 8820). 1.5.6 3- present. Station ref RF354658.

Bicton House, Agric. College (SY 0710 8670). 1.11.80 • present. Station ref RF354697.

•Kersbi'„v.'=. ‘ :n.. 1.1.69 - prrtS‘-?n«Stat i on ref Fr !

Ottet ; ci} T ! Seveial '11 f;' ''ni <r>n. ‘"'nuauges within ’ hr-c.t) tchmeni. .

Axe i <‘u: : nt 1 . D.L-impton. tlJ!1 * '>'.1 -2] 0 0480). 1 78-proôqt f.: .V. 1 «>' : :

C r i c k e t S t Thoma r. :; ] <73 0 0840) present. Station ref .F.F : 52262 .

Fairmile, Tale ( SY 0880 9710). 6.9.78 - present. Hips No. SY09F073.-Salston, West Hill (S Y 0881 9454). 1.5.76- present. Hips No: SY09F051.

Riggles, trib of Otter {ST 184 094). 7.1.70- present. Hips No. ST10F041.

Stowford, Colaton (SY 0588 8669). 1.8.73- . present. Hips No. SY08F052.

Pophams, Colaton (SY 0722 8769). 1.7.73- present. Hips No. SY08F051.

Goosemoor, Back Brook (SY 0696 8925). 1.4.76- present. Hips No. SY08F053.

Otter (discont) Allerbeare Farm, trib to Otter (ST 1480 0440).17.3.70-30.9.79. Hips No. ST1GF010.

Northvood .Farm, trib to Otter (ST 1840 02] 0 < .10.4.69-30.9.79. Hips No. STJ0F039.

Sandys Farm, trib to Otter (ST 2130 07<:0j.16.4.69-30.9.79. Hips No. ST20F007.

Axe (r:um ‘'i't ■' Wh i t f o r d B r j doe ( S Y 26 2 0 95 30). 1 . 1 r<. ;piesent. i._<. SV29F052. Telemetry.

Rock, trib to Yarty (ST 275 025). 16.4.69 present. Hips'No. ST20F026.

Wayford, trib to Clapton Stieam, (ST 409 072!. 9.12.69 - present. Hips No. ST40F008.

Axe tdisconu Shute Hill, trib to Axe (ST 2610 9790). 18.4.0V'.31.8.79. Hips No. SY29F0S1.'

Sail i combe, trib to Coly ( SY 1690 9550). 10. A. (r c'- 31.8.79. Hips No. SY19F0S1.

Blindmore. Farm, trib to Yarty (ST 2620 14 90 ! .15.4.69-31.8.79. Hi os No. ST21FQ15.

ground water levels at moni tor-im i-. . -

A list including length of and di scon* i r-< ’.‘j istat i '.'os : s bei ng pi oduced. A map 1

climatic data from climatc stat ion?? ' ' ■ *

Observer maintained stations' w.vh recorded variables.Parameters available include daily maximum, minimum, wet bulb and dry bulb temperatures, daily total sunshine hours and daily run of wind.

Colyford, Coly (ST 253 928).Wilmington, Umborne Bfook {SY 217 001).

Goren, Corry Brook (ST 234 023).

Court Place Farm, Yarty (ST 256 069)..1

Blindmore, Yarty (ST 262 147).* effluent returns

Only data held by NRA are consented volumes to discharge - in the form of daily maximums (under dry weather conditions) and daily maximums., (under wet weather conditions). SWWSL may have data of actual measured effluent returns.

2. Time series (calculated data)* areal rainfall

Areal rainfall values' for the SW region as a whole aie available (weekly values based on MORECs data).

No relevant calculations of aerially averaged rainfall for the Otter v and Axe catchments are available.-

Methods of calculation - 'ari thine; : • ••-••.in cl S€ i v . . : amyoGyvrecords (daily data)

- weighted mean value according to the LTA value for each of the selected r a ingauges (daily data)

- weighted mean value according to raingauge areas as estimated using a recognised method e.g. Theisson polygons

- use RAIJCARK. However, this is problematic and also not yet available.

* rainfall deficits (for defined periods eg 12 or 24 months)Calculation methods include

Use Halcrov-’Rainfall ;»• ■ ......u'amrne'. Thi' calculates -cumulative rainfall de*''’ ■1 • ■ '-elected rainaauge records for any year in the ■ • . methyl based on acombined function of i" - ; ■» I i t y nf .,-j [-articular daybeing wet ;and if the \ he LTA rainfall of thatday. The model producer- >a infall deficit/surplusvalues in mm which o \ ' r' ; over time. Output from themodel includes maximum r*:r‘ul-n i- e value, minimum cumulative value, 5% and 95% values and .the day of maximum deficit in

Otter

Low flow surveys have been undertaken on the Otter in 1976, 1984, 1989 and 1990. The data includes the flow, date and NGR. It(is held on TP. 1984, 1989 and 1990 data is also shown on 1;50. 000 OS maps held in Hydrometric Services. 1976 data is also shown .on 1;25000 First and Second Series maps, again held in Hydrometric services.

MRM also surveyed approximately 19 sites in the Otter over a fifteen month period in between 1987-1988 see attached table. Data includes flow, level, wetted perimeter, cross-sectional area and other channel parameters. This information is available from Hydrometric Services and is discussed by MRM. See reference 9.

All the above data has recently been copied to SWWSL. See Chris Beer for details.

Axe

Similar information is also held for■ River Axe.

* all spot river flow gaugings and rivei level measurements only

Other spot gauging information vili be available f both theOtter and Axe on TP.

* ground water levels in private boreholes

Available from licencc files.

* ground water level contour maps on a geological based map

Hap available of the current si tua* : r'-'\.

* borehole test pumping data

Available from licence files and Sy.v*SI- borehole technical files.

* river cross-sections and longitudinal surveys

Otter

Cross-sectional inf. or mat ion is - • * •.« ■■■: [ i ,• > «:»*.• i.-jo .The sites have been re-survey9-' - j'.'iai inrîvil s. The Iasipurveys were done in 199.1, e~■ ■ *■ > -mi •■d-,; dat^ ,'v hAv® h°cn destroyed. See Paul Hason for me:*-- : - • i np .

River cross-sectional data is .*••••• ! -■ fot the Riv»: Gissaqe at Honiton and for the Otter at Tiir ^ . ; hn. The. floc-5 .alleviation scheme at Tipton Si Jolm was m the eariv I^90s. SêG.Buxton-Smith for more information

. Valley and river cross-sectional data is also available f.~>r the Otter

Table 2.11 Sppt Gauging Stations

Station Watercourse Location Grid Ref- Catchment „ vv,, Area (tan* )

G 1 River Otter Hoerooor Farm ST 221 103' 16.1 f

G 2 Fair Oak Stream Upottery ST 199 077 4.6 H

G 3 Odle Brook Spurtham Farm ST 195 063 1.12 MG 4 River Otter Ford Bridge ST 183 030 41.7 FG 5 Lupp (Wick) Woodhayes Farm ST 169 029 17.3 PG6 Combe Raleigh Stream Honiton ST 161 021 2.58 FG 7 Gissage Honiton ST 153 010 8.46 nGe Wolf Weston ST 140 008 11.7 fG9 Gi tt Gittisham SY 135 9S2 2.87 FGIG Vine Fenny Bridges SY 114 986 5.18 Fg : i LHB Tr.ib

HolcombeAlfington SY 114 977 0.77 M

G 1 2 Woodcote Farm SY 101 962 3.02 HG 1 3 Wigaton Stream Wiggaton SY 101 937 1.51 f

Gl 4 LHB Trib Tipton St John sv 092 918 1.62G15 Metcombe Brook Metcombe SY 088 920 2. 74 f

G 1 6 Fluxton Stream Fluxton SY 087 928 3.45 MCl 1 Otterton Brook Otterton SY 081 853 3.71 . nG 1 8 Back Brook Newton Poppleford SY 083 987 . 8.57 f

G 19 Budleigh Brook Yettington SY 051 857 3.76 f ‘

M

(7 _K - HoJ'TKc.v

10 0

Commission were also used and a limited number of farmers were interviewed.In 1990 the NRA also undertook a river corridor survey on the Otter as part of a larger- Strategic exercise. Results include, sketches and Photos. See.Mike williamsDrainage

Some information is presented in MRMs report (Reference 3) and some background to drainage in the catchment is presented in Annex C of MRMs Report (Reference 2).

The information presented by MRM is based on the work of the Devon Trust for Nature Conservation. The work has- been reproduced by MRM and shows Ditch improvements, 1950s drainage schemes and drainage schemes, date unknown. '

As part of Nigel Holmes 1988 river corridor survey the presence of springs, issues and streams were compared with those shown on maps dating from 1957. It may be possible to make comparisons between 1906,1953,1957,1976 1983/4,1988,.-1989 and 1990 using the map, survey, gauging and photographic evidence available!

More detailed information on field drainage is believed tn be available from MAAF/ADAS. A charge may be involved.

* sediment source surveys

N. specific information available but survey data described above and pollution studies may provide some information on sediment sources.

4 Documents and other information

* authorised licence quantities and abstraction conditionsAll licence data for the Otter is summarised on a computer system. Print-outs are in respect of authorised quantites and a summary code flag of any conditions. Hardcopies of original licences going back to 1965 are available in licence files as is all correspondence both for current and cancelled licences.•The authorised data and ] icen-'? !- - -•■* I-..- f'lt <. .-inr)complete in the relevant files.

Returns data is only'as accurate av 1 during equipment

It is likely that 1960s and 1970s a i <' •.•.•i’ll. b“ accu»-arevivM eavailable provided a\ careful che >- to Ji renê itt efers■to.

\

1974-89 data (manual returns) are probably reasonable.

(Feniton area map available).

Otter

Engineering hold County Series maps (1906 & 1933 editions) at 1;2500 scale in the archive. Later series available.

Axe

Engineering hold County Series maps (1906&1933 editions) at 1;2S00 scale in the archive. Later series available.

* reports of earlier environmental/hydrological studies.Potentially useful reports include:

1 . The Otter Valley Catchment study, -Vol 1, Executive Report, draft Final Report August 1989.

2. The Otter Valley Catchment Study, VoJ 3, Landuse Faiming Practices, draft Final Auo'1989.

i. The Otter Valley catchment‘Study vol 5, Environmentai Studies, draft Final, August 1989.

Otter Valley Catchment Study, P-epr". t on Test Pumping carried out at Greatwe11 and Dot ton,April 198^.

r>. 'Study of 1989 Drought in SW England' Halcrow, Draf! Peport, Vo] ) . main Report (March 1990), Vo] T 'annexes).

6. Groundwatei Report no.N410C, Harr!’: 1990. Marcus Hodges. Environmentai.

7. New .Agr i cul tura 1 Landscapes Countryside Corr~,i ss: ' xr i .

8. A Second Look 1964, Countryside Commission.

9. Water Resource Development in Devon, The Otiei Valley Catchmop.t Study, Vol 2, Resource Modelling. HRM Final Draft Repoi t August 1989.

Most of the above are available in either the Via ter Resources oi NRA libraiy.


APPENDIX E Water Resources Planners Report

(ref: K1512.C01/R4-007, rev 2, printed 18 Feb 94)

NATIONAL RIVERS AUTHORITY SOUTH WESTERN REGIONWATER RESOURCES PLANNER'S REPORT :METHODOLOGY FOR ASSESSING IMPACTS OF ABSTRACTION FROM THE OTTER VALLEY TRIASS IC AQUIFER ON GROUNDWATER LEVELS

Contents:

1. Aims of the report

2. Hydrogeology of the Otter Valley Triassic Aquifer

3. Impact of variations in hydraulic gradient between the aquifer and adjacent river reaches on flow transfers between them.

4. Additional impacts caused by nearby groundwater abstractions5. Influence of monitoring station location

6. Groundwater level database

7. Methodology for assessing impacts'of abstraction on groundwater levels8. Using the data to assist validation of the Groundwater ModelAppendix 1 rRecommended GWL Monitoring Station Designations

for Abstraction Inpact Assessment Purposes

A: "Control" stations:

a) non-Otter Valley Triassic aquifer sites t b) Otter Valley Triassic aquifer sites

B: Known Abstraction Impact" and "Possible Impact" sites:a). Greatwellb) ‘ Harpfordc) Dottond) Colaton Raleighe) Ottertonf) Kersbrook

1. Aims of the report

The aim of this report is twofold:

* to summarise and categorise the groundwater level data held by the NRA ■ which may be useful for studying the impact of abstractions from theaquifer on groundwater levels;

* to recommend a methodology for separating the impacts of abstraction. on groundwater levels from those caused by other factors.

2. Hydrogeology of the Otter Valley Triassic Aquifer

The basic hydrogeological features of this aquifer are listed below.* The aquifer comprises both underlying Budleigh Salterton Pebble Beds and

Otter Sandstone strata of the Sherwood Sandstone group. They dip to the east at about 3 to 5 degrees.

* The main aquifer comprises the unconfined outcrop around, and south of, Ottery St Mary. It continues eastward under mudstone/marl strata (formerly known as the Keuper Marl) of Middle/Late Triassic age, where it eventually becomes confined.

* Outcrop topography comprises a flat flood plain along the main river valley about 1 km. wide with steeply indented side tributary valleys. The most westerly exposures "wedge out" along the Woodbury-Common — West Hill ridge (west of the River Otter); here Pebble Beds strata trrop out. To the east lies the main sandstone outcrop into which the River Otter has eroded its valley.

* Its hydrogeological characteristics are similar to other major sandstone aquifers, with high transmissivity and unconfined storage. '

* Hilly areas of the aquifer have unsaturated zones up to 50 metres thick, whilst areas along valleys have a thin unsaturated zone. The regional dip combined with the incised main valley results in artesian heads along parts of the Otter valley within the pebble beds strata at depth.

* The River Otter carries flow from the upper Otter catchment southwards across the aquifer to the coast at Budleigh Salterton, gaining a significant baseflow contribution from the aquifer on route.

* Tributaries from the western outcrop generally include gaining reaches, whereas those on the eastern side are intermittent losing streams, commonly with small flows dominated by flash run-off. Baseflows in the easterly tributaries are small, and are provided by scarp-slope headwater springs from the greensand strata capping the hills, rather than from the Triassic aquifer.

* There are likely to be a significant number of river reaches and springs where the hydraulic inter-connection between, the aquifer and the river system is good. Flow will be transferred fi'om the aquifer to the river, or vice versa, at such sites. The locc*l hydraulic gradient between groundwater levels and river levels will determine in which direction -and at what rate flow takes place.

In view of the importance of the nature of this process it is considered inmore detail in the next section.

3. Impact of variations in hydraulic gradient between- the aquifer and overlying river reaches on flow transfers between them.

Natural flow conditions can classified into three types:* reaches with "emergent flow” conditions -

local groundwater levels at such sites will be higher than local river level, resulting in groundwater flow emerging from the aquifer as baseflow to the river.

Sites along the main valley are most likely to be of this type.

* reaches with "influent flow" conditions -

local river levels at such sites will be naturally higher than local groundwater levels, allowing flow to enter the aquifer . from the overlying stream.

Sites more remote from the main river valley are most likely to be of this type.

* "intermittent" reaches -sites where conditions fluctuate between effluent and influent conditions, as the difference between local' water levels in the aquifer and in the overlying river reach alternates between positive and negative hydraulic gradients. The scale and duration of natural recharge due to infiltration of excess rainfall, and the local rate of recession once recharge, has ceased are the most significant natural factors affecting when the flow condition is influent or effluent.Sites in between the above locations are likely to be of this type.

sRates of flow between the aquifer and the river or springs will depend on the local head gradient and the hydraulic characteristics of both the aquifer and any overlying stream bed deposits.-

4. Additional impacts caused by nearby groundwater abstractions'

Where such sites also lie within the "com of depression" of groundwater levels caused by borehole abstraction, the additional- drawdown of the water table will produce different impacts, depending on the nature of the hydraulic conditions which currently existed, the scale of abstraction and its duration. These are likely to be as follows:

* where "emergent flow" conditions currently occurthe1 additional impact of groundwater abstraction will be to reduce the rate of emergent baseflow to' the river. If the impact increases so that hydraulic gradients reverse, the impact will increase and

cause intermittent or influent flow conditions, depending on the scale of abstraction impact in relation to natural factors.

* where "intermittent*' conditions occur -the inpact will be to increase the timescale and intensity of influent,, rather than effluent conditions. As above, if impacts increase, the influent condition may take over, resulting in perennial influent flow at that site.

* where "influent flow” conditions occur -the impact will be to increase the rate of flow, unless this has already reached its maximum rate.Note that where local groundwater levels are so far below river levels that an unsaturated zone exists between the river zone, and the underlying aquifer, any additional lowering of groundwater levels will not increase the rate of influent flow. This is due to the intrinsic nature of the flow process under unsaturated phase conditions.

5. Influence of geographical locationThe Otter Valley Triassic aquifer is complex. As a result there isconsiderable spatial variation in groundwater level response to naturalrecharge. Water level responses are influenced by many factors. Those ofgreatest significance include:

* proximity to areas of groundwater discharge;* proximity to the river, where changes in stage are reflected as

groundwater level fluctuations;

* proximity to the coast, where tidal responses are similarly reflected;

* proximity to abstraction points;* thickness of the unsaturated zone, and the presence of low permeability

material in the sequence;

* degree of confinement, and whether boLeiiole construction results- in measurements of water table, confined piezomet Lie head, or "mean" head at the site.

6. Groundwater level monitoring database

Table 6.1 of the NRA South West Region Hydrometric Report for 1992 lists currently operating groundwater level monitoring sites. Of these/ 43 provide data on sites in this aquifer in the Otter Valley; a further three for sites in the same aquifer but in the Culm catchment. There are many other stations monitoring groundwater levels in other, hydrogeologically similar sandstone aquifers in the region which are not subject to significant development. Some of these could also be used as control sites.

Monitoring stations which have at least 20 years of record are preferable for analytical purposes, though the absence of portions of the record will not be critical as long as they do not' exceed 20% thereof and do not include

, critical periods. One site, Heathlands, has a record extending back to 1950.

In terms of frequency of measurement, the database for examining .long term trends should comprise the groundwater level records for relevant stations which have been read at no less than monthly intervals..Any hydrograph is likely to contain a certain amount of "noise". A period of closely spaced readings should be sufficient to identify and isolate short term interference which may mask long term trends. .Common causes of "noise” can include responses to barometric pressure changes, effects of tidal loading, and short term responses in observation sites near abstraction

• points.

7. Methodology for assessing impacts of abstraction on groundwater levelsA rigorous approach is recommended to separate the impact of abstraction on the groundwater level at a particular site from influences due to other factors. This is because the relationships between natural . recharge, hydrogeological variables and site location are so complex and can differ appreciably from site to site.

For this reason it is recommended that a staged analysis be undertaken and that use should also be made of the Otter Valley Groundwater Model. This approach has the advantage that data for a number of sites can be used in a co-ordinated way to provide the best estimate of impacts.The recommended methodology is as follows:

Stage 1: Using local hydrogeological knowledge of NRA technical staff, assign groundwater level monitoring stations into three categories:

"* control" sites - located far enough from abstractions for the NRA to be confident that they will not be affected by abstractions

* "knorwn impact" sites - located close enough to significant' abstractions for the NRA to be confident they are affected by abstractions

* "possible inpact" sites - located where they may or may not be impacted by such abstractions.

Note: this has already been done and is reported as Appendix 1.Stage 2:. Compare Hydrographs for Known Impact and Likely Impact sites

with Control Sites to establish which show a good correlation in terms of range and shape of annual fluctuations and recession cha racte risti c.

Stage 3: Super inpose Known Inpact and Likely Inpact OTL- hydrographs on relevant Control Station hydrograph(s) and identify differences, concentrating on points of divergence or trends.

Stage 4: Compare results with forecasts of impact derived from either pumping test results for.relevant boreholes, using actual rates of abstraction, or the results of model runs from the validated Otter Valley Groundwater Model, using the runs set out below:"Historical" Run: - modelling historical conditions to date including actual abstraction, continuing the run to predict future impacts of the current level of abstraction.

"Naturalised" Run: - forecasting the natural condition with no abstraction by, re-running with historical natural recharge inputs but zero abstraction."Licensed Impact" Run: - as 1) above, but assuming abstraction will continue to increase to maximum achievable licensed rates in accordance with likely increased demands, to predict long term consequences of exploitation within existing authorised volumes and subject to other licence conditions.

Using the data to assist validation of the Groundwater ModelRecords from a number -of "control" and "known impact" sites can also assist final calibration and validation of the Otter Valley Groundwater Model, so that it produces groundwater level fluctuations at those sites to an acceptable accuracy with historical inputs.

This process may involve fine -tuning of "estimated natural recharge" (e.g. by variations to the delay function between the soil horizon and the water table, or by fine-tuning .the rain foi l -runoff component) as well as local recalibration of aquifer character!sties where required. It may also be necessary to make allowances for short term variations in groundwater level caused by barometric/tidal coupling and other such processes.

The final result should be to run the validated model with and without historical - actual abstraction to confirm that "control" sitefe are non affected by actual abstraction, if necessary making relevant final modifications to the model to also achieve an acceptable calibration at "known impact" sites under hidtorical abstraction conditions.

Running the model using the three sets of assumptions set out in the preceding section will enable the differences in . groundwater levels between these assumptions to be used to predict both short and long term impacts of abstraction at relevant "possible impact" OtfL monitoring stations, and for other locations where impacts need to be defined..

Outputs can be shown either in the form of individual well hydrographs or drawdown records, or as drawdown maps for specific dates. ■

APPENDIX 1 : RECOMMENDED GWL MONITORING STATION DESIGNATIONS FOR ABSTRACTION IMPACT ASSESSMENT

The station names in the following list refer to sites identified in more detail in Table 6.1 of the NRA Hydrometric Report for 1992 for' South West Region, a copy of which is attached for reference.A: Recommended "Control” stations

a) nor>-Otter Valley Triassic aquifer sites:

Hillhead {Permian sandstone aquifer - Clyst Sands)The Haywain (Triassic aquifer, Culm catchment* - other sites at Ashill

and Southey Barton were found to only have short records)b) Otter Valley Triassic aquifer sites:

Berry House Feniton Court Hayes Wood Heathlands*Highercoombe Higher Pitt Cottage Lancercombe LongmeadNorthmostown No. 4 Otterton No.2 Otterton No. 3 Passaford FaumSquabmoor House Tidwell Farm Tidwell No.l Wiggaton No.4Woodury Common 2 Woodbury ED Woodleys No.l

Note * - this station has a record which goes back to 1950.B: Recommended "Known Abstraction Impact" and "Possible Impact*1 Stations

(K) and (?) below indicate the station is designated as a "Known" or "Possible Impact" station respectively. (Analysis of "Possibles" will result in them either becoming "Control1' or "Known Impact" sites.

a) Greatwell source group:

Alfington 1 (K ) Alfington No.2 (K) Greatwell 5A (K)* Gr'twell 8 (?) Greatwell 9 (?) Salston Cott.s (?) Two Acre (?)

b) Harpford source group:

Harpford No.l (?) Harpford No.2 (?) Harpford 9A (K) Burrow (K)c) Dotton source group:

Dotton No.6 (K) Houghton Farm 2 (?) Warren House (?) Burrow (K)d) Colaton Raleigh source group: .

Colaton R. 2A (k ) Colaton R. 4A (K) Kingston Farm (?)e) Otterton source group:

East Budleigh 1 (K) Otterton 4 (K)f) Kersbrook source group:

Kersbrook 1A (K) Kersbrook IB (K) (GWOTTERNOTEFINALl71293.wp)

Trias sic

Stilt ion Name MeasurementFrequency

N .G .R . Altitude(ml

Archive Start Dale

IN I ’S No. Solid Geology Drift Geology Type

Alfmi;lon No 1 Dip-Monllily S Y -1 1 |0 -‘h,60 83 .01 l l . io . ' i SY I <>(.;(ms ( liter Sundstone Valley Gravels B{4)All’mgton No 2 Chart SY* 111 2-9744 66 01.12.1*173 ’ SY 19G049 Otter Sandstone B .Ashi 11 Chart ST-0R9I -1 IK3 . n o 11.04.1984 STO10026 Otter Sandstone BRerry Mouse Dip-2 Weeks S Y -1145-980} 70 01.02.1966 SY 190001 Otter Sandstone WRicton No 1 ■ Chnrt SY-0778-8605 22 09 .04 .|9K| SY08G149 ' Otter Sandstone BRicton No 3 Chart SY-0661-8544 38 19.05.1983 SY08G153 Otter Sandstone BRurrow , Dip-Monthly S Y-077 1 -8071 51 01.01.1969 SY08G0I6 Otter Sandstone W (4)Cnlnlon Rttlci^h 2A. Dtp-Monthly SY -0702-8705 v> 01.04.1971 SY08G031 Pebble Beds B (4)Coliiton Raleij'h'JA Dip-Monthly S Y -0750-8704 44 01.01. |0.,H SY080030 Pebble Beds BDotion No 6 Dip-Monthly SY-0863-8030 34 01.01.. tor,*) SY08GI22 Otter Sandstone Valley Gravels • B (4)FIasI Hudleigh No 1 Dip-Monthly SY-07 3 5-8466 7 16.01.1979 SY08GI42 Otter Sandstone/P. Beds BEast Rudleigh No 4 Dip-Monthly SY-0623-8445 31 09.05.1983 SY08G154 Otter Sandstone/P.Beds BEast Budleigh No 5 . Chart SY-0679-8379 30 06.04.1983 SY08G155 Otter Sandstone/P. Beds BFcniton Court Dip-2 Weeks SY* 1090-9937 72 01.12.1970 SYI9C052 Upper Marls WGrcflfwcll No 5A Chart SY-1102-9514 97 04.02.1977 SY19G059 Otter Sandstone B (4)Git*4«lwell No 8 Dip-Monthly SY-1068-9410 74 09.04.1973 SYI9G063 Otter Sandstone BOreaiwell No 9 Dip-Monthly SY-1023-9397 60 09.04.1973 SY19G064 Otter Sandstone ‘ BMwrpford No 1 Dip-Monthly SY-0912-9078 34 13.09.1971 SY09G098 Otter Sandstone/P. Beds Valley Gravel.1 B (4)1 Inrpfort! No 2 Dip-Monthly SY-0908-9080 26 08.11.1971 SY09GI73 Otter Sandstone Alluvium B (4)Hurpfon! No 9 A Chari SY-093 2-904? 55 01.01.1976 SY09GI02 Otter Sandstone/P. Beds B (4)Hnyes Wood Dip-2 Weeks SY-0511-8473 64 I2.0T. 1967 SY08G033 Otter Sandstone WHenthiands Dip-2 Weeks ‘ SY-0665-9234 103 01.M 1.1950 SY09G021 Otter Sandstone W (3 )Higher Pitt Cottage Dip-2 Weeks SY-0876-9659 59 02.07.1969 SY09G099 Otter Sandstone Valley Gravels W (3 )Highercoornbc Dip-2 Weeks S Y -1010-9200 73 03.01.1966 SYI9G044 Otter Sandstone W (3)Houghton Parm No 2 ■ Chnrt SY-0902-8803 31 01.01.1980 SY08GM4 Otter Sandstone/P. Beds BKe.rsbr<*ok No IA • Dip-Monthly SY-0638-8309 15 06.05.1983 SY08GI38 Otter Sandstone BKersbrook No 1 R Chari SY-0640-8308 ■ 15 29.03.1983 • SY08GI39 Otler Sandstone BKtnf.tun l:nrm Dip-2 Weeks SY-0652-8 7 K5 50 04.03.1966 SY08GO21 Otter Sandstone WI JURVK-nrrihc Dtp-2 Weeks SY-09 5 1 -9259 55 03.01.1966 SY09O088 Otter Sandstone WLon p mead 1 Dip-2 Weeks SY-0717-9324 02 02.01.1960 S Y09G040 Pebble Beds WLower East Homer Dip-2 Weeks ST-2564-0270 105 01.03.1966 ST20G004 Upper Marl WNorthmostown No 4 Chart . SY-0933-8846 46 28.05.19?3 SY08G077 Otter Sandstone BOtterton No 2 Chart SY-0847-8598 23 , • 02.06.1983 SY08G150 Otter Sandstone/P. Beds B

Permian

Station N;imc MeasurementFrequency

N .G .R . Altitude(hi)

Archive Start Date

m i^ No. Solid Geology Drift Geology Type

R;uchilt Dip-Motuhly SS-75UO-07JO I0K IH. 1?.. 1985 SS 700 004 Knowle Sandstone WUrsunpfnrd Spckt* Dip-Monthly SX-9287-99.1R 16 05.05. 1977 SX99r,(MR Unvcr Sandstone BMihiiscomiIh*, Dip-Monihly SX-9.SS4-79 1K It HI 01 . 19*7 SX97r;n27 Dawlish Sandstone BRrickhousc Fntm Dip-2 Weeks SX-94<10-R(W5 •11 15.01.1973 SX9X(.i050 Dawlish Sandstone Bftnsscls No 7 A ■ • Chart SX-9528-9871 24.11.1971 SX 99003 7 Lower Sandstone BRuttisfnr Farm Dip-Monthly SS-772S-0I06 ’ 83. (X,. 12.1985 SS70G006 Knowlc Sandstone WCanterbury Green. Dip*2 Weeks SY-0463-8897 125 20.06.1967 SY08G062 Lower Marls WCity Hospital Chart SX-9332-9281 01 01.03.1966 • SX99G023 • Breccia - WCofton Cross Dip-Monthly SX-9636-8015 8 01.01.1986 SX98G060 Dawlish Sandstone BCofton Farm Dip-Monthly SX-9680-8033 5 15.11.1969 SX98G041 Dawlish Sandstone WColeford Pnxhiction Dip-Monthly SS-7.S67-OI 57 106 01.01.1987 SS70G043 Knowle Sandstone BCnxtkc Burnell Dip-2 Weeks SS-6841 -0090 129 15.07. (969 SS6OGO14 Conglomerates WDuckBllcr No 1 Dip-Monthly SX-9579-8024 9 15.01.1973 SX98G046 Dawlish Sandstone BDuckaller No 1A Chart SX-9569-8017 10 15.01.1973 SX98G047 ' Dawlish Sandstone Alluvium BDuckaller No 4 Chart SX-9581-8150 18 15.01.1973 SX98G051 Dawlish Sandstone BDuckaller No 4 A Dip-Monthly SX-9560-8I50 20 15.01.1973 SX98G052 Dawlish Sandstone BDuckaller No 7 Chart SX-9509-8084 19 15.01.1973 SX98C049 Dawlish Sandstone BFord Dip-Monthly SS-7551-0087 89 05.12.1985 SS70G008 Knowlc Sandstone WGeorge Hill Dip-2 Weeks SS-8248-0089 139 01.03.1966 SS80G002 Breccia BHeathfield Collage Dip-2 Weeks SX-9434-9965 28 11.08.1969 SX99G052 Lower Sandstone Valley Gravels WHit! Head Dip-Monthly SX-9826-9673 34 02.01.1969 SX99G017 Lower Sandstone BKenton Vicarage . Dip-2 Weeks S X -9581 -8341 19 03.01.1969 SX98G040 Dawlish Sandstone WKingdom Cottage Dip-2 Weeks ST-07 83-05 3 8 1)5 28.02.1966 ST000025 Lower Marls WKnowlc Farm . Dip-Monthly SS-7819-0143 105 06.12.1985 SS70G002 Knowle Sandstone WKnowle Production Dip-Monthly SS-7762-0142 91 06.12.1985 SS70G003 Knowle Sandstone BLandsend Barton Dip-2 Weeks SS-7437-OOI7 127 15.07.1969 SS70G009 Knowle Sandstone WLinden Lee Dip-2 Weeks SX-9845-9088 17 01.01.1970 SX99C036 Lower Sandstone wLillie Pirrwell Dip-2 Weeks ST-0746-0915 137 17.03.1983 ST00G015 Upper Sandstone wMiddle Holljicombc Dip-2 Weeks ' SS-8004-0027 89 01.03.1966 SS80G0I9 Breccia W (2 )Shutterlon Dip-Monthly SX-9679-7900 6 . 17.06.1986 SX97G023 Dawlish Sandstone BTapps Farm Knowle Dip-Monthly SS-7809-0165 99 21.08.1985 SS70G00I Knowle Sandstone W (2 )Wrsllake Farm R231 • Dip-2 Week?; SX-9521 -8145 25 01.01.1985 SX9K0053 Dawlish Sandstone B

Triassic (continued)Table 6,1

Station Ntune Mea.MircnicnlFrequency

N .G .R . Altitude(m)

Archive Start Date

HIPS No. Solid Geology Drift Geology Type

Otterton No 3 Chart SY-0941-8650 60 02.06.1983 SY08GI5I Otter Sandstone/P.Beds BOtterton No 4 Dip-Monthly SY -07 80-8466 17 14.06.1983 SY08GI52 - Otter Sandstone/P. Beds BPnssaford Paim Dip-2 Weeks SY-0905-R766 26 • 1 1.07.1969 SY08G026 Otter Sandstone WSalston Collages Dip-2 Weeks SY-0R90-9475 56 01.05.I960 SYD9GI00 Otter Sandstone Valley Gravels WSouthey Barton Chart ST-0884*! 340 08 12.09.1985 ST0IGO27 Otter Sandstone BThe Haywain . Chart ST-0887-1717 138 02.01.1969 ST0IG0I4 Otter Sandstone WTidwell F»rm Dip-Monthly SY-0607-8332 24 21.06.1967 SY0RG034 Otter Sandstone WTidwell No 1 Chart SY-0609-8287 30 01.08.1979 SY.0RG 146 Otter Sandstone BTwo Acre Dip-2 Weeks S Y -1079-951R 83 07.09.1969 SY19G065 Otter Sandstone WWnrren House Dip-2 Weeks SY-0787-8910 56 . 03.01,1966 SY0RG081 Otter Sandstone WWigpwton No 4 Dip-Monthly SY-0932-9357 37 03.01.1966 SY09G054 Otter Sandstone/P.Beds Alluvium BWoodbury Common 2 Dip-Monthly SY-05 3 3-87 82 116 30.11.1967 SY08G065 Pebble Beds B.Woodbury ED Dip-Monthly SY-0414-8434 94 27.03.1968 SY08G038 Pebble Beds BWoodleys No 1 Dip-2 Weeks SY-0850-9146 42 03.01.1966 SY09G095 Otter Sandstone W

Jurassic

Station Name MeasurementFrequency

N .G .R . Altitude(til) ✓

Archive Start Date

inrs No. Solid Geology D rift Geology Type

Vurlyns Chart ST-4145-0493 107 01.03.1966 ST40C002 Upper Lias W

Cretaceous

Station Nnmc Measurement

Frequency

N.G.R. Altitude(m)

Archive

Sluri Dote

MIPS No. Solid Geology Drift Geology Type

Mrer Chart SY-21 15-9043 R4 30.12.1969 SY29G0I6 Upper Greensand/Chalk Clay w ith Flints BMil! H im iv Dip-2 Weeks ST-1123-0777 240 . 01.01.1970 STI0G045 Up|v*r Greenland WLinn* K iln Way D ip-M onthly ST-3765-0671 I 30 03.01.I960 ST30G007 Up|X‘r Greensand WOatcns F'arm .Dip-2 Wr<*ks ST -1 R80-1230 236 25.04.1969 ST t IG02I UpjH;r Greenland WRousdon N<' 1 B Chari SY-2RR6-(J,|Q7 105 10.08.1084 SY2.0G050 Upper Greenland BSunnysidu I ;imn Dip ? Week*;. SI-1 SI 1(137-1 2 1 R 2R.02.1066 ST i oe ;oo 1 UpjH’ r Greenland wWhitlnnds Chari SY-3<>50*0(42 I5K 10.08.1984 SY39G052 • Upj>cr Greenland ___ ____ • ____

Tidwell 1ameasured Groundwater Levels

1973-1992

Groundwater Level - m.a.o.d

MonthTidwell 1a

c:\grdwaier\data\Tidgrp.wk3

Tidwell Farmmeasured Groundwater Levels

1973-1992

Groundwater Level m.a.o.d

MonthTidwell Farm

c:\grdwater\data\contsrte.wk3

Warren Housemeasured Groundwater Levels

1973-1992Groundwater Level - m.a.o.d

Month

c :\grdwater\data\Dottgrp. wk3'

Warren House

Hillheadmeasured Groundwater Levels

1973-1992


Month

c :\grdwater^graphs\contoth. wk3

Hillhead

Feniton Courtmeasured Groundwater Levels

1973-1992


MonthFeniton Court


Colaton Raleigh 2Ameasured Groundwater Levels


Month

Colaton Raleigh 2ac:\grdvvater\crgroup.wk3

Wiggaton No.4measured Groundwater Levels

1973-1992


MonthWiggaton No.4

c:\grcfwater\data\contsite.wk3

Otterton 3measured Groundwater Levels

1973-1992


MonthOtterton 3

c :\g rdwate r\d ata\ottg rp. w k3

Woodbury Commonmeasured Groundwater Levels

1973-1992


Month

c:\grdwater\data\contslte.wk3

Woodbury Common

Woodbury EDmeasured Groundwater Levels

1973-1992


MonthWoodbury ED

c:\grdwater\data\contsite.wk3

Woodley’s No.1Measured Groundwater Level

1973-1992


MonthWoodley’s No.1

c:\grdwater\corrtgrp.wk3

Woodley’s No.1measured Groundwater Levels

1953-1972


MonthWoodley’s No.1

c:\grdwater\data\oldbores.wk3

Squabmoor Housemeasured Groundwater Levels

1973-1992


MonthSquabmoor House

c:\grdwateAdata\crgroup.wk3

Berry Housemeasured Groundwater Levels

1953-1972


MonthBerry House

c: \g rdwate r\data\old bo res. wk3

Great well 9measured Groundwater Levels


MonthGreatwell 9

c:\grdwater\data\grealgrp.wk3

Berry HouseMeasured Groundwater Level

1973-1992


MonthBerry House

c:\grdwater\contgrp.wk3

The Haywainmeasured Groundwater Levels

1973-1992


c:\grcfwateAgraphs\corrtoth.wk3

MonthThe Haywain

Ashillmeasured Groundwater Levels

1973-1992


MonthAshill

c: \g rdwater\g rap h s\co nto t h. w k3

Southey Bartonmeasured Groundwater Levels


MonthSouthey Barton

c:\grdwater\graphs\contoth.wk3

Hayes Wood Cottagemeasured Groundwater Levels

1973-1992


MonthHayes Wood Cottage


Heat

hian

dsm

easu

red

Gro

undw

ater

Lev

els

1953

-197

2■

ie

4s4s4«

Is

Is

I*si co

8 c

4 o |5 5 £4 S5 I4s4e»in

4s

4r*.in

4s4s45

4n

4

i

c :\g

rdwa

ter\d

ata\

oldb

o res

.wk

3

Higher CoombeMeasured Groundwater Level

1973-1992


Month

c :\g rdwater\co rrtgrp. wk3

Higher Coombe

Higher Coombemeasured Groundwater Levels

1953-1972


MonthHigher Coombe

c:\grdwater\data\oldbo res.wk3

Higher Pitt Cottagemeasured Groundwater Levels

1973-1992

Jan 73 Jan 74 Jan 75 Jan 7# Jan 77 Jan 78 Jan 79 Jan 80 Jan 81 Jan 82 Jan 83 Jan 84 Jan 8S Jan 86 Jan 87 Jsi 88 Jan 89 Jan 00 Jan 91 Jan 92

MonthHigher Pitt Cottage


LongmeadMeasured Groundwater Level

1973-1992


MonthLongmead

c:\grdwateAcontgrp.wk3

Longmeadmeasured Groundwater Levels

1953-1972


MonthLongmead

c:\grdwater\data\oldbores.wk3

Northmostown No.4measured Groundwater Levels


MonthNorthmostown No.4

c :\grdwater\data\contsite. wk3

Passaford Farmmeasured Groundwater Levels

1973-1992


MonthPassaford Farm

c:\grdwater\data\contsfte.wk3

Alfington No.1measured Groundwater Levels

1973-1992


MonthAlfington 1

c:\grdwater\data\greatgroup.wk3

Alfington No.2measured Groundwater Levels

1973-1992


MonthAlfington 2

c:\grdwater\data\greatgroup.wk3

Two Acremeasured Groundwater Levels

1973-1992


MonthTwo Acre

c:\grdwater\data\greatgrp.wk3

Harpford 2measured Groundwater Levels

1973-1992


MonthHarpford 2

c :\g rdwater\data\Harpg rp. wk3


1973-1992


MonthHarpford 1

c:\grdwater\data\Harpgrp.wk3


1973-1992


MonthHarpford 9

c:\grdwater\data\Harpgrp.wk3

Dotton No.6measured Groundwater Levels

1973-1992


MonthDotton No.6

c:\grdwater\data\Dottgrp.wk3

Burrowmeasured Groundwater Levels

1973-1992


MonthBurrow

c:\grdwateiAdata\Harpgrp.wk3


Colaton Raleigh 4Ameasured Groundwater Levels

Month

Colaton Raleigh 4ac :\grdwater\crgroup. wk3


Kingston Farmmeasured Groundwater Levels

Month

Kingston Farmc:\grdwater\crgroup.wk3

East Budleighmeasured Groundwater Levels

1973-1992


MonthEast Budleigh

c :\grdwater\data\ottgrp. wk3


1973-1992


MonthOtterton 2

c :\grdwater\data\ottgrp. wk3


1973-1992


MonthOtterton 4

c :\grdwater\data\ottgrp.wk3

Kersbrook 1ameasured Groundwater Levels

1973-1992


MonthKersbrook la

c:\grdWater\data\Tidgrp.wk3

Kersbrook 1bmeasured Groundwater Levels

1973-1992


MonthKersbrook 1b

c:\grdwater\data\Tidgrp.wk3

Houghton Farm 2measured Groundwater Levels

1973-1992


MonthHoughton Farm 2

c: \g rdwater\data\ext ra wk3

Salston Cottagesmeasured Groundwater Levels

1973-1992

Jan 73 Jan 74 Jan 79 Jan 76 Jan 77 Jan 78 Jan 70 Jan 80 Jan 81 Jan 82 Jan 83 Jan 04 Jan 85 Jan 88 Jan 07 Jan 88 Jan 80 Jat 00 Jan 01 Jsi 02

MonthSalston Cottages

c :\grdwater\data\extra wk3

Harpford 9a. measured Groundwater Levels

1973-1992

Groundwater Level- m.a.o.d

MonthHarpford 9a

c :\grdwater\data\extra wk3

Lancercombemeasured Groundwater Levels

1973-1992

Groundwater Level- m.a.o.d

MonthLancercombe

c:\grdwater\data\extrawk3

Woodleys No. 1measured Groundwater Levels

1973-1992


MonthWoodleys No. 1

c:\grdwater\data\extrawk3

Gre

atw

ell

8m

easu

red

Gro

undw

ater

Lev

els

1973

-199

24a

4s48484a

48484s

8

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APPENDIX F Notes of Hydrology Methodology

(ref: K1512.C 01/R 4-007. rev 2, printed 18 Feb 94) WS/Atkin,

COMMENTS ON METHODOLOGY FOR PRODUCTION OF NRA OTTER ABSTRACTION ORIGINAL DATA SET, FROM WHICH TABLES ARE ULTIMATELY TO BE DERIVED TO BE INCLUDED IN THE W.S. ATKINS REPORT.Background.

The following comments relate to the methods used by NRA staff t o .produce initial manual tables of data relating to abstractions (actual and authorised), within the Otter catchment, covering a period 1972-1992 inclusive. It should be noted that these manual tables do also contain daily authorised data, but this was hot used in production of original data sets for use in the Otter Report. The manual 'original data set' was summated into 'groupings/ as indicated below,, and input to a computer file 'original data set'. From this a 'rounded original data set' was produced, .and the required report table output driven off this.

General Points

* Basic print out obtained listing all licences which were current at some stage during the period 1972 - 1992 incl.* Licences were split by being surface water or ground water.* Licensed purposes at their lowest individual level were listed by year.* Licenced purposes were identified as falling in one of two categories: being greater than 100m3/day, or less than or equal to 100m3/day authorised rate.* Reach catchments were identified by using Helen's Grid references for reaches, and constructing catchments draining to those points. The standard technique for defining the catchment as at 90' to the contour lines was used.* Each licence on the basic print out was identified as falling within a specific reach catchment. For purposes of initial divisions, the full sets of reaches A-J were used. Separate notation was used to cater for the 'Rob Brown reaches' which were given a suffix 1 (eg Bl, Dl) and Squabmoor (SQ). Reach J was internally renamed F2 ie the Kersbrook catchment, and the label F3 attached to the area of the left hand bank of the River Otter below the lower point defining reach F.* Licensed purposes were grouped as:- SWU - statutory water undertakingNon -SWU - agriculture (agr), private domestic (pws), industrial processing (inp), spray irrigation (spa and spo).Non Consumptive - leats (lea, pws z), domestic amenity (pws y, pws z), pisciculture (agr p, pws p), hydropower (agr w, pws w, inp w ) , industrial cooling (inc).* A futher grouping of SWU licences was agreed as follows:-Otterhead; St Cyres; Greatwell 1,2,3,46,5; Harpford 5,6,7,8,9; Dot’ton 4,5; Dotton 1,2,3,7; Colaton Raleigh 2,4; Otterton 1A,4.** Reaches were grouped such that reaches G and H were included with E; reaches I, F2,7'F3 ■»lyriainn were included with F. Any reach with a suffix was included within the same lettered reach ie Bl went with B, Dl went with D and FI went with F.

* Abstraction data for reaches F2 and F3 were included within the original data set as follows:-Included data for both groundwater and surface water licences in F2 and groundwater only in the F3 catchment, where aquifer drainage would be preferentially towards the R Otter, not the coast.Tin 1.1 II '-~0Q ■lufeehorwcryt?) 1 cmlj ■ tiha' i Cqnafetngw^gffiff^TgrilnyLUU ■liwfwnQy i ict o iiiLlUllOT.—* The whole data set of licences has been used to produce the 'original data set' from which the report tables can be compiled. This includes the previous subset used by Atkins (ie > 100m3/day and seme odd spray licences which made returns), but also now includes all licensed abstractions which operated at any time within the 21 year time frame.* The original data set thus holds all licenced purposes sorted by source type, by reach, by purpose grouping, by year, by threshold daily with both authorised and 'actual / guestimated actual' annual quantities.* Data has been compiled on the basis of annual figures (both authorised and actual), originally in m3, but displayed in Ml and rounded.* The convention used for rounding in the report tables (3.6.1 and 3.1.1) is to always throw upwards on the 0.5. eg 27.5 becomes 28, 26.5 *becomes 27 etc. Note, that this convention was used on the report table production and not on the original data set where in the main whole annual figures are held.Where decimals did occur in the original data set (eg where 50% of authorised was being guestimated for actual usage), the convention of throwing to the odd on the 0.5 was used, eg 27.5 would become 27. 27.4 becomes 27, 27.6 becomes 28, 26.5 would become 27, 26.4 becomes 26, 26.6 becomes 27. This evens up the data set.* It should be noted that for ease of report table production, the original data set is held on computer file including decimal places. From this has been derived a 'rounded original data set' and this is used as the 'source file' for the data output to report tables.* Please see Duncan Waugh with respect to documentation of the conventions used in table production and 'rounding' on computer file especially with respect to means and totals.

Authorised Data

Conventions used:-* where a quantity'attached to a purpose on a licence was changed during a year, either varied'up or down, the higher value pertaining for the year was used, irrespective of the period of the year it was operational. This caters for maximum potential impact.No double counting of such purposes was allowed.* where a code altered because of administrative changes in coding eg in 1984 when all SPA & SPO codes were changed to sub code J from 0 or K, and to L from L and M, and LEA codes became INF, FW.r- or AGR with subcodes as appropriate, only one'value has been be counted for the year, the codes are in fact a continuum and do not reflect a valid change to the licence quantities.* where licences are operated in conjunction with an aggregate authorised quantity on the annual figure 50% of the aggregate annual value was attached to each licence., unless a- different split was actually indicated in the licence file, in which case the actual proportion split was used.

* where a licence indicated in its additional information that a hydram was / is used*, and where this use was / is not separately identified within the purposes information and no further clarification was available from the licence file, a value equivalent to the^metricated daily gallonage indicated and multiplied by 365 was included in non-consumptive category, with a start date as for the earliest purpose on the licence. If further inforination was found on the licence file this was used'to derive the correct annual figure for hydram use.* where a licence was closed down and opened up in another guise under a different number (most particularly the SWU licences in 1984 where licence groupings were changed), a 'continuum approach' was adopted, with again the highest value for the year being quoted derived from all of the individual licences involved. It should be noted that these licences 'dovetailed' with each other and did not overlap in any way, thus allowing this approach to be valid. This avoids double accounting.'* where a number of licences were cancelled and the sources and uses transferred onto one of the licences as an administrative convenience, the result is an apparent variation up of the one licence. Provided that dates 'dovetailed7 and where it was obvious that this was gbing on, single accounting took place, and again a 'continuum' approach adopted. If there was any doubt, each licence was accounted for separately to present a 'worst case' situation.

'Actual Abstraction and Guestimated Data'.

* Real returns data was used for all SWU, and SPA SPO licences where it was held.* *Where data could not be read off the print from the micro fiche returns, the original fiche was again viewed and figures on the copies clarified. Weekly and monthly totals on returns .were checked and if necessary, retotalled to ensure correct annual figures were input.* Where the SWU / SPA/O data set contained actual missing months or missing years, (as opposed to valid nil returns) the data was infilled by proportioning from the nearest other returns for the year / month in question based on relative performances of the licences over time. In the absence of such information, an educated 'guess' was made. ** For spray irrigation licences which did not .make returns, a percentage consumption for each reach for each source type for each year was derived, from those licences which had made returns. This percentage was used to multiply the annual authorised value for licences where no return was made, to obtain a guestimated value.* If no licences with returns existed for the reach and source type, the other source type for the reach was used.* If no licences with returns existed at a] 1 for the reach the overall catchment percentage of use for that year w^s used as a multiplier for the annual authorised value for the licence in question.* the actual and guestimated values for spray irrigation were totalled for each source type, reach, < or < 100m3/day, and year.* For agricultural, industrial processing and private domestic uses the principle of a 50% of authorised annual value was used. ’•* All the agricultural, domestic, industrial and spray values were then totalled by category to'give the non-swu^figures.* Non consumptives were not included within the exercise to produce 'actual' abstraction data.

* The 'actual' data set is thus a 'best estimate' amalgam of actual and guestimated consumptions.* All Otterhead data returns (01/0002) have been verified and agreed with Wessex Water (16.12.93) in view of confusion surrounding this data set.

Other Matters.

* It should be noted that non-consumptive licences do not just include leats. There is often a presumption that they are synonymous.* Spot checks have been made to check that figures have been correctly transcribed from print - out or paper , fiche or other records correctly.* The above explanations are not necessarily phrased for direct transcription to the report as they address the nfethodology behind the collation of data for the original data set, which spawned the rounded original data set from which report tables are derived. They are also couched in 'my style' for NRA and Atkins use and information. If text is required within a * specific context, I would be happy to comment to Atkins on whether any 'interpretation' of my comments is factually correct.* There should be a standard NRA disclaimer regarding the accuracy of actual returns data, which should appear on all the tables where actual returns data has been used, and reference made in text.I attach a copy of a form of words which currently appears in the appropriate Authority PIN (note, NOT a public document) and in a draft internal document regarding disclosure of information which is currently undergoing HQ legal section audit prior to formal internal adoption.* In view of the highly 'grouped' nature of the current data presentation, unless report text makes specific reference to non-SWU actual abstractions by individual licence, I see no need to contact individual abstractors to seek permission for release of data. Wessex and South West Water are aware of the report and have raised no objections that I am awar^ of.* If there are any other matters that are not clear from this ‘description or are missed out, please let me know.

S Greenfield.Water Abstraction Officer.

ref - otteratkinsprotocol20.12.93

NRA SOUTH WESTERN WATER RESOURCES PLANNER'S NOTE FOR FILECHANGES IN LICENSED VOLUMES ASSOCIATED WITH SWW5L OTTERTON LICENCE - 23.5.91

The following table summarises the changes in’licensed volumes which occurred on 23.5.91.when the Otterton boreholes licence (01/0544) was issued and as a result of contemporaneous variations to the Harpford boreholes licence (01/0518) and the Dotton 4 & 5 boreholes licence (01/0520).

The Otterton borehole licence and the related variations are time limited for five years. When they expire on 23.5.96 the position will revert to the situation which existed immediately prior to granting the Otterton licence.

Table 1 : Changes in Licenced Volumes resulting from the Otterton Licence

Source Group Licence Former Max. Volumes Current Max. VolumesNo. Daily Annual Daily Annual

Otterton B/hs 01/0544 - - 6.0/7.0* . 2313

Dotton B/hs 4 & 5 01/0520 6.0 ’ 1592 2.5 230

Harpford B/hs 01/0518 - 7.6 2774 4.7 1716

Totals 13.6 4366 13.2/14.2* 4259

Ancillary Notes

1. (See * above) - The daily maximum abstraction rate for the Otterton boreholes is 7.0,Ml/d during May,June,July and August, 6.0 Ml/d during the rest of the year.

2. A further condition requires abstraction to cease if the groundwater level at a particular saline monitoring borehole falls below a prescribed level related to Ordnance Datum. This ensures that the aquifer is protected from saline intrusion.

3. The variations associated with the Dotton/Harpford. licences transferred licenced resources down-catchment and slightly reduced the total annual volume which is authorised to be abstracted.

4. Groundwater modelling studies showed that:* the transfer of resources down-catchment benefits flows in the reach

between Tipton St. John and Otterton, an*;!

* the cumulative impact adjacent to downstream of the Otterton boreholes would not be increased. (The Otterton borehole sources partly intercept groundwater flowing direct to the coast, so abstraction from them also has less overall impact on river flow in the Otter than the equivalent abstraction taken from the Dotton/Harpford boreholes).

These changes resulted in an element of environmental gain from this scheme.

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APPENDIX G Water Resources Planners Note

(ref: K1512.C01/R 4-007. rev 2. printed 18 Feb 94) m a m ,

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N A T I O N A L R I V E R S A U T H O R I T Y

W A T E R R E S O U R C E S P L A N N E R ' S NOTE:

Introduction

SOUTH WESTERN REGIONNON-CONSUMPTIVE ABSTRACTION IN THE OTTER CATCHMENT

Non-consumptive uses are those where abstraction is returned to the source of supply with minimal loss after use and with minimal delay, or subject to a continuous abstraction/return arrangement. They include fish farming, hydropower generation, non-evaporative cooling and amenity flows to ponds.

The most common arrangement involves abstracting water from a river or stream into a leat system, bypassing a reach of the main river. Variations can include returning the water to a different stream or river; abstracting from a leat, returning it either to the' leat .or to the adjacent river; and abstraction from streams in steep valleys to power a hydram, where the water taken bypasses the stream between the intake pipe and the hydram outlet.

Map 1 identifies the locations of the five authorized non-consumptive abstractions in the Otter catchment and a further site for which an application has been made. Maps 2 to 7 provide details of bypassed reaches. Table 1 below summarises key details about each abstraction.

This note summarises the theoretical impact of each non-consumptive abstraction licence on the flow resources of the River Otter and identifies those sites where additional study of actual impact may be warranted.

Details of the Otter Non-consumptive Abstractions

Table 1: Authorised non-consumptive abstractions in the Otter catchment, 1993

NGR SiteLicenceNo.

01/0464

01/0536

01/0433

01/0484

01/0440

Maximum Authorised Length of Reach Volumes in Ml: Bypassed in Km:Daily Annual To Overspill Total

ChannelST156011 Tracey Mill Trout 4.36 1593(Map 2) Farm, River Otter

SY075973 Escot Aquaculture, 0.71 50(Map 3)trib. of River Tale

SY052868 Stowford Leat, 0.12 43(Map 4) Colaton Raleigh Str.

SY095961 Ottery Leat, 11.82 4314(Map 5) River Otter

SY091926 Tipton Mill Leat, 11.89 1691(Map 6) • River Otter

0.4

transfer

1.0

0.2

0.6

0.6

5.5

1.8

1.1

n/a SY080855 Otterton Mill Leat, 43.2 (Map 7) River'Otter

15768 • 0.3 0.S

Key points about each site are discussed below.

Tracey Mill Trout Farm, 01/0464 (See Map 2):

Flow in the River Otter bifurcates at NGR ST160011 and part of it passes into the Tracay Mill Leat, returning to the main river at NGR 153011'. The flow into the leat is not an "abstraction” as it is uncontrolled. The authorised abstraction into Tracey Mill Trout Farm takes place from halfway down this leat at NGR ST156011 returning flow to the main river at NGR ST156012. The licensed abstraction does not "cause" the bypassing of a reach of the main river; it reduces the residual flow down the rest of the leat.

Escot Aquaculture, 01/0536 (See Map 3):

Escot Aquaculture have a licence to abstract water from a tributary of the River Tale at NGR SY075973. The water is authorised to pass down a series of ponds adjacent to that tributary, returning at NGR 'SY080973. It is remote from the main River Otter.

Stowford Leat, 01/04 33 (See Map 4):

Abstraction is licensed from the headwaters of the Colaton Raleigh Stream at NGR SY052868 into Stowford Leat - an old leat which supplies lands associated with the Rolle Estate and Bicton College. The leat bifurcates at NGR SY061867, part being routed via Bicton College Gardens, part via Blackberry Farm into Bicton Lake. They combine and diverge again below, part passing through Bicton Farm before merging again and joining the drainage system on the flood plain of the River Otter. This discharges to the main River Otter at NGR SY079853, just upstream of Otterton Bridge.

Ottery Mill Leat, 01/0484 (See Map 5):

Abstraction is licensed from the River Otter at Head Weir, Ottery St. Mary into the Ottery Leat. Some of this flow returns via a tumbling weir 900 m down the leat, the rest continues down the tail race, discharging back , to the river a further 700 m downstream.

Tipton Mill Leat, 01/0440 (See Map 6):

Abstraction is licensed from the River Otter from a weir 800 m. north of Tipton St. John into Tipton Mill Leat. An overspill occurs back to the river just upstream of the mill, 200 m. down the leat. The tail race continues for a further 800 m, rejoining the river by Tipton Bridge.

Otterton Mill Leat {See Map 7):

Abstraction takes place from the River Otter at a weir 250 m. north of Otterton Bridge into Otterton Mill Leat. An overspill occurs back to the river by Otterton Bridge..The tail race continues a further 200 m. before rejoining the river.- >

Impacts on Flows in the Main River Otter

Before considering impacts it is relevant to take account of the inherent complexity of the flow process in the river. This complexity makes it very difficult to identify changes of less than ten per cent by flow gauging, except where a river gauging station has been established to the relevant British Standards. *

A basic criterion for "significance of impact" on flows has therefore been taken to be the causation of a change of at least 10%. Changes of less than 10% are not considered significant.

Theoretical impacts of the non-consumptive abstractions located along the main river corridor can be gauged by considering the figures in Table 2 below. These show how much of the theoretical flow resources in the River Otter immediately upstream of the point of abstraction would be annexed if abstraction takes place at the maximum rates authorised.

The flow resource statistics used are the Average Daily Flow (TADF) and Dry Weather Flow (TQ95) as estimated using MICROLCWFLCWS. This is a standard hydrological statistical model which calculates "naturalised" flows. It was developed by the Institute of Hydrology and has been calibrated for the Otter by NRA SW hydrological staff.

Table 2: Non-consumptive Abstractions and Main River Resources

N G R Site Volumes Authorised as % of flow in

- Annual/TADF

adjacentDaily/XftDF

river reach Annual/ 1Q9S

Daily/TQ95

ST155013 Tracey Mill Leat 3.9 3.9 19.8 19.8

SY095961 Ottery Mill Leat 6.7 6-. 7 30.5 30.5

SY091926 Tipton Mill Leat 1.9 4.9 7.5 19.3

SY080855 Otterton Mill Leat n/a n/a n/a n/a

Notes:

2.

Figures are theoretical and take no account of actual conditions at the intakes, etc. which may restrict abstraction to less than authorised rates. Any such limitations are likely to reduce actual impacts, particularly under dry weather flow conditions.

Rates applied for in the Licence of Entitlement application for the Otterton Leat abstraction represented 15.7 and 62.3% of the TADF and TQ95 resources respectively.

Specific impacts at each site are considered below.

Tracey Mill Leat'site: See Map 2

Table 2 shows that the rate of abstraction authorised from Tracey Hill Leat represents 3.9% of the theoretical river resources at the leat

bifurcation. This is not considered significant. The authorised abstraction represents 19.8% of the theoretical dry weather river resource, so although the bifurcation is not controlled it may result in some effects being evident in the bypassed river reach. It must be remembered however that this will be caused by the natural bifurcation, not the abstraction from the leat itself. ' *

Escot Aquaculture site: See Map 3

Since this abstraction takes place from a minor tributary and water is returned to it, no consideration has needed to be given to its impact on flows in the main River Otter.

Stowford Leat site: See Map 4

This abstraction depletes flow along both the Colaton Raleigh Stream and the main River Otter between its confluence with that stream and Otterton Bridge. As the maximum authorised rate of abstraction represents less than 0.2% of the theoretical dry weather river flow resource at Otterton Bridge, its impact on River Otter Flows is negligible and no further consideration is deemed necessary.

Ottery Mill Leat site: See Map 5 "

The figures in Table 2 suggest that under normal conditions this abstraction has an insignificant impact on river flow as it represents 6.7% of the local ADF resource. However the licensed abstraction represents 30.5% of the local dry weather flow resources, so a more detailed consideration of actual impact at times of dry weather flow appears warranted.

Tipton Mill Leat site: See Map 6

Again, the figures suggest that under normal conditions this abstraction has insignificant impact on river flow as it represents between 1.9 and 4.9% of the local ADF resource. The licensed abstraction represents between 7.5 and 19.3% of the local dry weather flow resources, so a more detailed consideration of actual impact at such times may be warranted.

Otterton Mill Leat site: See Map 7

This abstraction is one which has returned to the pre-application stage, following the refusal . of an application for a Licence of Entitlement under Section 126 of the Water Resource? Act 1989. The refusal was because the purpose, power for a corn mill, was invalid. This is because the corn mill is run for a commercial purpose, not simply as part of an "agricultural or domestic use” which this Section of the Water resources Act applies to. A new application will need to be considered under the normal abstraction legislation. The final licence when issued will be subject to conditions to protect the main River Otter,.so final authorised volumes may be markedly different to those originally applied for.

The volumes applied for in the Licence of. Entitlement application represent about 16 and'62% of the TADF and TQ9S resources respectively.

However it is known that there are a number of mitigating aspects. Otterton Leat has amenity, conservation and fisheries value in its own right. For instance, it is known to enhance the nursery area for fish, and sea trout apparently use the overflow channel and upper leat system to bypass the main river weir which is impassable' to them at certain flows.

Conclusions

It must be remembered that these impacts are theoretical estimates based on licensed volumes and theoretical resources. Nevertheless:

1. Only three abstractions, those into the Ottery St. Mary, Tipton St. John and Otterton Mill Leats, affect flows in the main river Otter.

2. - Tracey Mill Leat may also have some impact, but this will be causedby the natural bifurcation at the leat offtake rather than the abstraction which has been licensed from the leat itself. Any impact is only expected to be significant at times of low flow.

3. Both the Ottery and Tipton leat abstractions only have a measurable impact on flows in the bypassed reaches under low flow conditions. These are estimated to be 30.5%, and 7.5 to 19.3% respectively.

4. Both the Ottery and Otterton leat systems include features of archaeological interest as well as having particular fisheries, recreation, conservation and amenity value in their own right.

5. Rates of flow down the Otterton Leat may have a measurable impact in relation to the naturalised flow resource at Otterton under normal conditions and the impact on dry weather flow resources may be significant.

Recommendations

1. Any further studies of non-consumptive abstractions on the River Otter should focus on actual impacts at times of low , flow on the reaches bypassed by the Tracey, Ottery, Tipton and Cfcterton Mill Leats.

2. Additional studies are recommended at any of the above sites if they are in a reach within which W S Atkins identify detrimental environmental conditions in their forthcoming Environmental Review of the River Otter.

3. Studies to identify causes of such conditions should include a dry weather flow survey encompassing both the leat and the bypassed reach of the main River Otter> to help differentiate impacts caused by the relevant non- consumptive abstraction from both other abstractions and other factors..

3. Any licence granted authorising abstractions into the Otterton Leat should incorporate appropriate 'conditions to minimise impacts on river flows, balancing the fisheries, conservation and amenity interests of both and taking into account the archaeological value of the leat. •

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APPENDIX H

Electrofishing Data 1983 - 1992

(ref: K1512.C01/R 4-007. rev 2. printed 18 Feb 94)- em a m

RIVER OTTER FTSH SURVEYS 1983-1992 TROUT DENSITY (100m2)

RIVER

OTTER

LUXTON Str.

ULLCOMBE BROOK

NEWCOTT Str

FAJROAKStr. ■

ODLE BROOK

LUPP

SITE NAME

RoystonKnackers Hole br, Hoemoor Twistgates Philishayes Farm U pottery rtound Copse Monkton Langford dapper fGlapper Br. b s weston Br. DeurPark d/S Colhayes Br. 'Fenny Br.U/s Cadhay Br. Dunkirk SaJston Barlon Cotley Barlon Tipton st John DoltonColaton ralelgh Otterton

Churchin'gford

Ullcombe Farm

Highley Farm

U pottery

Odle Brook

Mathayes U/S lupitt Br. Lake Farm Hillside

1983 1984 1986

14.29 - 0.00

60.71 - 0.006.48 - ■ 0.40

0.00 - 0.00

0.68 - 0.000.00 • -

0.000.21 0.00 0.00 ‘0.00 0.04 0.00 0.00 0.00 •0.04 0.00 0.00

- * 0.00 0.00

6323 - 3.28

0.00 - -0.00

0.00 - 0.00

0.00 - 0.00

0.00 - 0.00 60.78 - 0.000.68 - 0.00

TROUT PARR (1 + +)1992 1983 1984 1986 I992

24.63 20.71 _ 65.01 17.3415.25 - - 24.4020.05 - 45.41 - • 33.70 213817.96 27.13 - 21.49 33291.71 - - - 15.891.97 14.60 - 16.75 11.470.00 - . - 9J570.49 4.73 -■ 1.10 938 .

0.93 3.08 - — — 256- 122 - - -

0.00 - 2.30 - 6.08- 052 . - -

- - 0.86 # — -- - 0.14 - -- - 0.91 * - -- - 1:14 — -- - 3.19 * - -

- 075 - -- - 0.49 — -- — 853 —- - 0.39 * - -

, - - 0.46 * - -— — 057 — —

51.53 9.68 - 2050 7.16

3.72 0.00 - 153 3.72

16.60 2.99 _

l

5.00 11.77

0.00 0.00 - 0.00 4.77

2727 _____ _ 28.8314.20 25.00 — 2441 31563.88 31.37 - 21.41 1155

22.09 20.41 — 15.17 1932

COOMBE RAUEGHStr..

GiSSAGE

WOLF

GITT1SHAM

BUCKERALL

VINE WATER

ALFINGTON Str.

TALE

PAYHEMBURY Str.

Bam Farm 0.00She Ivin 0.00Wick 0.91 NurseryLake Cottage 2.94Uxford Br. 5.48Millhouse 1,30

NewHouse 0.00Longwood 0.00

U/S Blannicombe 89.90D/S Blannicombe 25.53Coombehayes 8.70

Wolverslone 18.84Grange Farm 4.44 Old ChaplelfieldAllerFarm 0.00D/S Godford Br. 0.00Godford Mill 0.00Awliscombe 0.00Winneford 0.00

U/S Gittisham 19.12D/S Pomery 6.84

Treaslake farm 0.00

Whitehouse Comer 0.00

D/S Alfington 0.00

Landend - BroadhemburyD/S Colliton Br. 1656D/S Colliton Barton 34.54Danes Mill 3.53Tuck Mill 1.59Payhembury o.OOMilton 0.00Talewater 0.47TaJaton 0.00Escot Park 0.00TaJeford 1,06 D/S Payhembury Br.

I

0.00 0.00 0.000.00 - 0.00 - 0.00 —0.00 1.93 12.79 - 954 14.18

- 1.83 - - — 11 DO0.00 2.50 1.47 “ 451 0.000.00 153 2.05 ■ -* 7.14 9.171.11 1.43 3.04 - 5.01 10.04

- — 0.00 —- 0.00 0.00 - - 0.00

- 39.56 2020 — _ 4450- 1058 10.64 - — 3352— 5.49 31.74 — . — 55.36

0.00 40.79 21.74 _ 18.09 25580.00 50.10 8.89 - 1055 17.02

- 7.63 - - — 6.160.00 0.00 0.00 — 0.00 3.770.00 . - 0.00 — 225 —0.00 3.38 0.00 — 0.74 5J910.00 0.00 0.00 - 1.67 OJOO0.00 0.00 0.00 - 0.00 0.00

- 4.36 19.12 _ _ , 35.67— 12.20 6.84 - - 7.03

- 0.00 0.00 - 2.68

- 0.00 0.00 - - 254

- 0.00 0.00 - 0.00

- 19.66 _ _ _ 3554— 955 - - — 4126

31.45 51.74 12.74 — 2J94 9J3Q14.37 12.67 155 - ■ I 329 2500.00 9.86 1824 - 19.14 15.080.40 4.17 8.73 - 4J92 5540.00 . 0.00 ' — 0.00 _0.00 - 0.00' — 1.98 —

0.00 6.21 3.77 - 0.98 13.750.00 - 0.00 - 0.00 —

0.00 5.85 4.05 - • 1.71 6590.00 420 529 - 2-82 2.10

— 0.00 - - - OJOO

TALATON Str D/s TaJaton STW

St MARY STREAM D/S B3176 5.00

SAUSTON Str. Gauging St. -

WEST STREAM HILL ' . U/S Salston 10.81

KNIGHTSTONE BROOK U/S Pixys Parlour 0.00

WIGGATON BROOK Lower Wolston 0.00

FLUXTON BROOK Mount Stephen 44.33

METCOMBE BROOK-. Higher Metcombe 20122U/S Metcombe 30.00Metcombe Vale 3.90

VENN OTTERY D/S Venn Ottery Barlon 0.00

SOUTHERTON Southerton 0.00

BACK BROOK Stoney Ford 32.67G oosem oor 13.43Hillside 17.09

COLATON RALBGH Str. Stowford —Pophams Farm 6.30

BUD LEIGH BROOK Kerslake 163.73U/S Sawmills -

— 0.00 — — 0.00

- 0.00 0.00 - - 0.00

- 14.66 - - ■ - 2.66

- - 0.00 - - -

- 0.00 0.00 - - 0.00

- 0.00 2.99 - - 0.00

- 42.19 825 - - 5*37

_ 8.65 15.85 _ _ 731- 42.83 16.67 - - 10J93- 15.45 23.38 — — 1158

- - 0.00 - - -

- - 0.00 - -

_ — 158 _ —

- - 14.93 - - -— 17.57 0.00 - - 759

— 33.41 — — — 8.74- 827 0.79 — — 0.75

36.93 6.86 - - 162523.50 - 14.09

I


APPENDIX I

Summary of Trends in Stocking and Cropping

(ref: K1512.C01/R4-007. rev 2, printed 18 Feb 94) B S

Table 2.1 - St— <rjr of Trends tn Cropping and Slocking In the R iver Otter Catctaaent Area - Per Cent land Use 1940 to 1985

Year 1940 1950 I960 1970 1980 1985

Section of CilChmerU Area Horlh South Total North South Total North South Total North South Total North South Total North South Total

x v 1 t t X 1 I t I I X x X t X 1 t 1

Cropping

Cereals and Fa) low 10 17 14 13 I* 14 7 14 11 9 19 15 0 24 17 8 25 18

Root Crops 1 1 1 1 3 2 - 1 - - 1 - - 1 1 . 2 I

01 Heed Rape I Other Crops • - - - - - - - - - - • . - . 1 .

Horticulture I Orchards 2 4 3 2 5 3, 2 4 3 - 3 2 - 1 1 - 2 1

leys 3 4 3 10 9 9 14 IS 15 14 19 17 12 21 16 11 19 16Permanent Pasture 70 65 68 62 59 61 65 56 60 68 51 59 71 48 58 73 47 58

Rough Grattng 12 S B 9 4 7 9 4 6 8 3 5 8 2 4 7 1 4

Other Forage Crops 2 4 3 3 5 4 3 6 5 1 4 2 1 2 I 1 3 2

TOTAl - I 100 100 too 100 100 100 too 100 100 100 100 100 100 100 100 100 100 100

TOTAL • Ha 1/ 9409 11194 20603 9437 10882 20319 9319 U317 20636 40)1 11791 20802 8794 11677 20471 8710 11702 20412

Stocking Rate - Ha/GLU 1.10 1.03 1 >06 l.OZ 0.9S 0.98 0.93 0.91 0.92 0.79 0.71 0.74 0.70 0.59 0.64 0.59 0.59 0.59

1/ E x c l u d e s w o o d l a n d a n d o t h e r l a n d

2/ G r a / t n g L i v e s t o c k U n i t


APPENDIX J

SSSI Designations In the River Otter Catchment

<rel: K1512.C01/R4-007. rev 2, printed 18 Feb 94) IwfeteWJBfi

C IT A T IO N S H E E T

C O U NTY: D E V O N SITE NAME: OTTER ESTUARY

D I S T R I C T : E A S T D E V O N

St a t u s : S i t e of S p e c i a l S c i e n t i f i c Interest (SSSI) notified under Section 28 of the

W i l d l i f e and C o u n t r y s i d e Act 1981 (as amended)

L o c a l P l a n n i n g A u t h o r i t y : Devon County Council, East Devon District Council

N a t i o n a l G r i d R e f e r e n c e : SY 0 7 3 8 3 0 Area: 33.3 (ha) 82.3 (ac)

O r d n a n c e S u r v e y S h e e t 1:50,000: -192 1:10,000: SY 08 5E

Dat e N o t i f i e d ( U n d e r 1949 Act): - *' Date o f Last R e vision:- -

D a t e N o t i f i e d ( U n d e r 1981 Act): 1986 Date o f Last Revision: -

O t h e r I n f o r m a t i o n : A ne w site. In East Devon Area of O utstanding Natural Beauty.

In C o u n t y S t r u c t u r e Plan C o a stal Preservation Area. Part a D evon Trust for Nature

C o n s e r v a t i o n N a t u r e R e s e r v e (leased). *

D e s c r i p t i o n and R e a s o n s for N o t i f i c a t i o n :

The O t t e r E s t u a r y c o n t a i n s a wide range of saltmarsh communities which together wit

a d d i t i o n a l a r e a s of tall h erb and scrub, support high numbers of breeding and overwinterin

b i r d s p e c i e s . O t t e r t o n Point is an important location for v ertebrate palaeontology.IIF l o w i n g d u e south, the lower 2km reach of the River Otter is bounded by sea embankmenl

to the w e s t and a c l i f f of sandstone rising to some 10m on its eastern side. Belov W h i t e D r i d g e the d i v e r g e n c e of the embankment from the direction of the river channel

: he e s t u a r y to b r o a d e n to a m a x i m u m width of 0.5km. Here, the deep, fine a l l u v i u n ®

u-s e n a b l e d a v e 1 1 - d e v e l o p e d pan and creek system to form. A shingle ridge r u n n i n g ®

e a s t w a r d s f r o m the w e s t shore v i rtually closes the estuary from the sea, the river entering the sea at O t t e r t o n Point through a 5m gap. m

The s a l t m a r s h flora is particularly well developed, with successions of G l a s s w o r t s ®

(S a l i c o m i a s p p ) and C o m m o n Cord-grass (Spartina a n g l i c a ) at the lower levels; Common

1 t m a r s h - g r a s s (P u c c i n e l l i a m a r i t i m a ), Sea-purslane (Halim i o n e p o r t u l a c o i d e s ) and S e a H

A r r o w g r a s s (T r i g l o c h i n m a r i t i m a ) occurring on the middle marsh w ith Annual Sea-blite (S u a e d a ®

j a r i t i m a ) , Sea A s t e r (A s t e r t r i p o l i u m ) and Thrift (Armeria m a r i t i m a ) becoming more abundant on the h i g h e r areas. Charac t e r i s t i c of the uppermost levels are Sea Rush (J u n c u s M •na r i t i m u s ) , S p e a r - l e a v e d Orache (Attriplex h a s t a t a ) and Red Fescue (Festuca r u b r a ). A r e a s ®

s u b j e c t to o n l y o c c a s i o n a l flooding support stands of Common Reed (Phragmites a u s t r a l i s ) ^

Dr Sea C l u b - r u s h (S c i r p u s m a r i t i m u s ), both of which support high numbers of invertebrates.

A d d i t i o n a l h a b i t a t v a r i e t y is found along the western side of the sea wall. Here t h e ® lamp a reas s u p p o r t a m a r s h vegetation which includes Yellow Iris (Iris p s e u d a c o r u s ), C o m m o n ®

-leabane ( P u l i c a r i a d v s e n t e r i c a ) , Purple - loosestrife (Lythrum s a l i c a r i a ), Cross-wort

vC r u c i a t a l a e v i p e s ) and D i v ided Sedge (Carex divisa) , as well as a small reedbed w i t h ™

»reas of o p e n w a t e r . Rock Sea-lavender (Limonium b i n e r v o s u m ) is present on the c l i f f ® Lpdf»*>s t o w a r d s the sea. ®

Ji. r i v e r t e r r a c e u p s t r e a m of White Bridge, a dense growth of Willow (Salix s p p ) s c r u b s

m d tall h e r b s p r o v i d e s undi s t u r b e d cover for many breeding birds, particularly for s u m m e r ®

•isitors suc h as the Reed and Sedge Warblers (Acrocephalus scirpaceus and A. s c h o e n o b a e n u s ) -t

vlso b r e e d i n g on the site are Serin (Serinus serinus), Nu.thatch (Sitta e u r o p a e a ), Stonechat S a x i c o l a t o r q u a v a ), all three species of Woodpecker, Little Owl (Athene n o c t u a ), S h e l d u c k ®

T a d o r n a t a d o r n a ) and Mute Swan (Cygnus o l o r ). Overwintering species include Firecrest ■

Re g u l u s i R n i c a p i l l u s ) , S i s k i n (Carduelis spi n u s ) and wat e r b i r d s such as Teal (Anas c r e c c a ), ater Rail (R a l l u s a q u a t i c u s ) and Dunlin (Calidris alpina). M

here a>re s e v e r a l d i s t i n c t communities of mud-dwelting invertebrates in the e s t u a r y . ™

n a r a c t e r i s t i c s p e c i e s include the bivalve Peppery F u r r o w - s h e l l■ (Scrobicularia p l a n a ),

he r a g w o r m N e r e i s ■ di v e r s i c o l o r . and the crustacean Corop h i u m v o l u t a t o r . This variety, ®

o g e t h e r w i t h a d j a c e n t habitats, provides food for a cor r e s p o n d i n g variety of bird species, ®

ome of w h i c h can be present in large numbers, principally Curl e w (Numenius a r q u a i a ) and

a p w i n g (V a n e l i u s v a n e l l u s ). The area is an important additional feeding station for m

irds f rom the n e a r b y Exe Estuary, especially during severe weather. ®

c t e r t o n Point i tse lf has yielded the best remains of the diagnostic tooth plates, as o 1 1 as a l ower jaw, of a fossil kno^n as “the Devon, r h y n c h o s a u r " . As the only fossils, am

■'esc a l l o w a p p r o x i m a t e mid-Triassic dating of the Otter Sandstone Formation. This ir. ®* so the m o s t s o u t h e r l y occurrence of Rhvnchosaurus , and it is of interest as a feature

f a n c i e n t g e o g r a p h y . The lower jaw uns collected recently, and there is potential for

>re finds and f ut ur e research.

O T T E R E S T U A K Y DEVON

- MK \\V_jK

O J

r N ATU RE C O N S ER V A N C Y C O U N C IL- . S ite boundary thus Sca le 1 :10 0000 Metres 600[ rJ r*---- r1----H— H —i—10 Yard* 600Based on the Ordnance S u rv e y 1:10 000 map w ith the pe rm iss ion of the C o n tro l le r of Her M ajesty 's S tat ionery O f f ic e . C ro w n Copyr ight reserved 1985^10

Notified to S e c r e t a r y of State on 15 F

CITATION SHEET .

« ;,UNTY: S O M E R S E T / D E V O N SITE NAME: SOUTHEY AND COT L E I C H MOORS

DIST R I C T : T A U N T O N DEANE, E A S T DEVON, MID DEVON

J

I

IStatus: Sice of Special S c i e ntific Interest (SSSI) notified under Section 28

• of the Wild Life and Countryside Ac t 1 9 8 1 (as amended ) _

L o c a l P l a n n i n g Authority: TAUNTON D E A N E , MID DEVON, E AST DEVON DISTRICT COUN C I L S *SOMERSET COUNTY COUNCIL,. D EVON C O U N T Y COUNCIL

N a t i o n a l Crid. Reference: S T 192110 Area: 81.3 (ha) 2 00.8 (ac) ■

O r d n a n c e S u r v e y Sheet 1:50,000: 193 1:10,000: S T 11 SE

Date Not i f i e d (Under 19i9 Act): Date of Last Revision:

Date Not i f i e d (Under 1981 Act): 1988 Date of Last Revision:

O t h e r Information: A NEW SITE.

D e s c r i p t i o n and Reasons for Notification:

S o u t h e y i nd C o t l e i g h Hoor s i s one o f the r i c h e t C mosa i cs o f v a l l e y m i r e . a c l d - o a r s h g r a s s l a n d and A l d e r / B i r c h cji found on cht BUckdov-n H i l l s . The s i c e c o n t a i n s a l a r g e and d i v e r s e , m o d e r a t e l y a c i d f l u s h and bog c o a p l o

The B ol hj i v R i v e r h * i cut t hr ou gh t he C r e t a c e o u s Creensand on Che Blackdown H i l l s c r e a t i n g a v a l l e y w i t h s h a l l o w l y s l o p i i s i d e s o c c u p i e d by the two Moors . The G r ee n l a n d g i v e * r i s e t o p e r o e s b l e c o a r s e and l oamy s o i l s o f the Hense s e r i e s . Fr< s p r i n g s emerge f rom Che v a l l e . y s i d e s l o c a l l y r a i s i n g Che w a t e r Cable and p r od uc ing s h a l l o w p e a t y s u r f a c e h o r l t o n t . In pr< the v a l l e y s i d e s appear t e r r a c e d w i t h a pronounced upper p l a t e a u , a sh ar p d r op o v e r Crecnsand t o Che e l r e system and a (k g e n t l e s l o p e down t o the v a l l e y b a s i c . On S o u t h ey Moor t h i s t r a n s i t i o n I s nar ked by a br up t v e g e t a t i o n changes .

I

I

I

I

iOp 11

; o u t i

ITlit c e n t r e o f Lht v a l l e y mi re sy s t e m l i e s on t he s p r i n g 1 toe vhere bog p o o l COenualCies have d e v e l o p e d o v e r e t p os ed l o g g e d peat w i t h Bog Pood Weed ( Po t aaof l e t on po l y g o o l f o l l u s ) . C o m o o C ot co og r aa a ( E r l o p h o r u a anRua C 1 f o 1 lua ) aod harsh St Jol w or t ( Hyper i cum e l o d e s ) . As w a t e r moves away f r o ® Che s p r i n g s I t s p r e a ds l o c o ch an n e l s w h i c h I n t e r s e c t low hummock] Sphagnum p a p i l l o s u m . D i v i d i n g h o l l o w s c o n t a i n P r e pa noc l adu s r e v o l v e n s . a moss v e r y r a r e I d S o m e r s e t . A v e r y l a r g e po p u l a t l < o f U h l t e B ea V -s e dg e ( Rhyncoapora a l b a ) la domlnaa t o v e r ouch o f t h i s r e l a t i v e l y ba se poor ‘ p l a t e a u ' . bog . F ur t he r down t> s l o p e hunaocV i are d o m i n a t e d by Sphaf tnm s u b o l t e n s e n j o y i n g i n c r e a s i n g l y base r i c h c o n d i t i o n s . Ro un d - l ea v ed sundew ( Dr< r o t und i f o l l a ) . O b l o n g l e a v e d Sundew ( D . I nc e nae d l a ) and P a l e ButCervorC ( P l a g u l c u l a l u a l t a o l c a ) o c c u r i o the h o l l o w s w i t h Bog A s ph o d e l ( S - r t h e c l u a oss i f r a g i m ) . The t ops o f h m o c l u h c i t a we C beach cocssualcy o f C r o a a - l e a v e d H e a t h . (1 t e t r s l l x ) . Hea t h M i l k w o r t ( P o l y g a l a a e r p y 111f o l 1 a ) and HeaCb S p o t t e d - o r c h l d ( D a c t y l o r h l t i m a c u l a t a ) .

I: lUiT r a n s i t i o n s t o s e v e r a l r e l a t e d p l aoC co mmuni t i es can be seen v l c b l o the c i c e . W i t h I n c r e a s i n g d i s t a n c e from spr l ngs| s e e p a g e s the w a t e r t a b l e f a l l s a l l o w i n g c o l o o l r a t l o n b y H e a t h e r ( Ca l l uoa v u l f t a r l s ) . 6 e l l ; H e a t h e r ( E r i c a c l n e r e a ) and Eurt C o r s e ( U l e » e u r o p a e u a ) . A sma l l p o p u l a t i o n o f F i r Club Koaa ( Bypera l a a e l a g o ) o c c u r a l o t he d r y he a t h c o m u n l t y on Cot l W ( Mo o r . A c i d m j r a h y g r a s s l a n d tends t o * r i « e o v e r f lu s h e d and l i g h t l y g r a t e d a r e a a . Sharp f l o w e r e d ruah ( Juqcus a c u t t f l o r u i i s o f e c o domi nant i n a award c o a t a l o l B g Red Fescue ( F es tuca r u b r a ) . Sweet V e n i a l Crass ( A n th o g a o t h u a o d e r s t u n ) aod Wo o d- r us h ( L u t u l i n u l t i f l o r a ) . V h e r e c h a n n e l s form v l c b l o t he aarsh g r r s a l a o d , H a r a b ~ m a r i g o l d ( C a l t h a p a l u s t r l s ) ,V i o l e t ( V i o l a p a l u s t r l s ) and f lagged L o b i n ( L y c h n i s l o a - c u c u l l ) can be fpund.

he v a l l e y s i d e s a r c c o l o n i z e d by A l d e r I•Mi

1 :

H e a v i l y w i t e r * l o g g e d m i n e r a l a o l l a I d the v a l l e y b a s l o aod aeepsgea oo t h e v a l l e y a i de a a r e c o l o n i z e d by A l d e r ( A l o t g 1 ut i n o n ? w i t h a gr ound f l o r a d o n l o a t e d by C r e a t e r Tuaaock Sedge ( Car cx p a o l e u l a t a ) o r Remote Sedge ( C a r e i rent B r y o p h y t e c o v e r l a e x t e n s i v e w i t h u t i o f R h l t c w n l u a punc ta tua *ad B r ac h y t he c l u n r ut abu l un i . A t t h e e x t r em e v e s t o f the J c l d - m a r a h y g r a s s l a n d g r a d e s i n t o « g r a s s l a n d t o m u o l t y dominated "by C r e s t e d Dog ' a - t a l l ( Cynoaurua c r l a t a t u s ) , Cooaon ( A g r o t t i s c a p i l l a r l s ) * nd Heath C r as s ( P a n t h o n l a d e cu o b t n s ) c o o t a l o l o g abundant Coenoa g " « p w e e d ( C e n t a u r e a o l g r a ) .

The d i v e r s i t y o f the s i t e i s enhanced by the pr esence o f the Bolhtn r i v e r and s ma l l a re aa o f s t a n d i n g w a t e r which Inc the a mp hi b i an and I n v e r t e b r a t e i n t e r e s t . The n a t i o n a l l y a c a r c e l e a f b e e t l e P h y l l o b r o t l e a Q uad r I ma cu la t a has r e c e n t l y f Ound he r e . V

I

I

I

I

S O U T H E Y A N D G O T L E I G H M O O R SS O M E R S E T /D E V O N

N A TU R E C O N S ER V A N C Y C O U N C IL - , S ite boundary thus S ca le 1 :1 0 0 0 00 M e [ICS 6 0 0

f--------J- I 1 1 1 - ___>

0 6^0 B^sed on the O rdnance S u rv ey 1 :10 0 0 0 m ap w ith the p e rm is s io n of the C ontro lle r of Her M a je s ty 's S ta t io n e ry OMtce C ro w n Copyr ight re se rved 1987^8 f0

Mci

fcv

CITATION SHEET

COUNTY: D E V O N SITE NAME: LADRAM BAY TO SIDMOUTH

DISTRICT:. E A S T DEVON

Status: Site of Special Scientific Interest (SSSI) notified under Section 28

of the Wildlife and Countryside Act 198l(as amended)

L o c a l P l a n n i n g Authority: Devon County Council, East Devon District Council

N a t i o n a l Grid Reference: SY 096847 to 1 0 6 8 6 0 Area: 18.4 (ha) 45.5 (ac)

and SY 122868O r d n a n c e S u r v e y Sheet 1:50,000: 192 1:10,000: SY 08 SE, NE; SY 18 Nt

D a t e N o t i f i e d (Under 1949 Act): 1952 (part) D * te of Last Revision: 1976

D a t e N o t i f i e d (Under 1981 Act): 1986 Date of Last Revision: -

O t h e r Information:

A m e n d e d from previous Windgate Cliffs SSSI by extension and deletion.

In East D e v o n Area of Outstanding Natural Beauty (above H W M ) , and Heritage Coast.

D e s c r i p t i o n and Reasons for N ot i f i c a t i o n :

Ladrara Bay is an important site for coastal geomorphology. A series of well-

d e v e l o p e d cliffs, stacks and shore platforms cut in the red sandstones of the

K e u p e r r e p r e s e n t one .of very few assemblages of such forms in southern Britain.

M o r e o v e r , they are unique in Britain in being formed in the relatively easily

e r o d e d s a n d stone, and owe" their preservation largely to the relatively low energy

r e g i m e in w h i c h they occur. The shore platforms are structurally controlled to

the extent that some surfaces coincide with joint plates, while erosion along

n e a r - v e r t i c a l joints has played a major role in i s olating stacks from the mainland.

T h e cliffs b e l o w High Peak and Chit Rocks at Sidmouth, have yielded remains of M i d d l e T r i a s s i c fossil fish, amphibians and reptiles. Specimens of theiabyrinthodont

Ma s t o d o n s a u r u s (including type material) and the rhynchosaur Rhynchosaurus are

c l o s e l y s i m i l a r to forms from the W a r wick and Bromsgrove area in the Midlands,

an d a l l o w c o r r e l a t i o n between the two areas. The remains from High Peak are

d i s a r t i c u l a t e d but well preserved, and fresh cliff falls will almost certainly

y i e l d m ore material. The best fauna of Middle Triassic fossil vertebrates in s o u t h e r n Britain.

SITS NOTIFIED TO SECRETARY OF STATE ON 22 OCTOBER 1986

NOT£:The boundary Is the Mean Low W ater mark between A A B.and C A 0.

LAD RAM

BAVTO

SID

MO

UTH

SITE

NOTIFIED

TO SECRETARY

OF

DEVO

N

STATE

ON 22

OCTOBER

1986

' COUNTY: DEVON SITE NAME: BUDLEIGH SALTERTON CL IF

DISTRICT: EAST DEVON

Status: Site of Special Scientific Interest (SSSI) notified' under Section 28 of the Wildlife and Countryside Act 1981

Local Planning Authority: Devon County Council, East Devon District. Council.

National Grid Reference: ST 060815

Ordnance Survey Sheet 1:50,000: 192

Date Notified (Under 19**9 ^ct): 1964

Date Notified (Under 1981 Act): 1985

Other Information:

Area: 10.6 (ha) 26.2(ac)

1:10,000: SY 08 SE

Date of Last Revision: 1976

Date of Last Revision:

In East Devoz* Area of Outstanding Natural Beauty.Site boundary amended by extension and deletion.

Description:

A magnificent coastal section exposing the full thickness of the Lover Triassic Budleigh Salterton Pebble Beds, a sequence of texturally mature conglomerates deposited by braided rivers. These include pebbles of Ordovician quartzite with an indigenous fauna derived from the erosion of a ridge of much older Palaeozoic rocks lying to the south or south-west. The conglomerates are overlain by fluvial and aeolian sandstones of the Otter Sandstone Formation which contain at the base a layer of viiid-facetted pebbles(dreikanter) f and also well developed columnar calcrete horizons. • .

BUDLEIGH SALTERTON CLIFFSDEVON

BUDLEIGH SALTERTON

0|6

NATURE CONSERVANCY COUNCIL^ Site boundary thus — Scale 1:10 0000 Me I re 5 600---- 1 H--i' ,-1- t 1 I 1

0 Yards , 600Based on the O rdnance Su rvey 1:10 000 map w ith the p e rm iss io n of the Contro lle r of Her M a je s ty 's S ta t io n e ry O ff ice . C ro w n Copyright re se rved 1 9 8 V 11

r\ ~7

CITATION SHEET

COUNTY: D E V O N SITE NAME: EAST DEVON PEBBLEBED HEATHS

DISTRICT: E A S T DEVON

Status: Site of Special Scientific Interest (SSSI) notified under Section 28

of the Wildlife and Countryside Act 1 9 8 1 (as amended)

L ocal P l a n n i n g Aut-hority: Devon County Council, East Devon District Council

N a t i o n a l Grid Reference: SY 050880 Area: 1111.9 (ha) 2747.5 . (ac)

O r d n a n c e Survey Sheet 1:50,000: 192 1:10,000: SY 09 SW SE

SY 08 N W NE SW

Date Notified (Under 1949 Act): 1952 1972 Date of Last Revision: 1976

1974 (parts)

Date Not i f i e d (Under 1 9 8 K A c t ) : 1983 (part) Date of Last Revision:1986

O t h e r I n f o r m a t i o n :,Nature Conservation Review site. Incorporates SSSIs notified u n a e r IfTfe Nat l o n a l Parks and Access to the Countryside Act 1949 as Aylesbeare and Har p f o r d Commons, Bicton and East Budleigh Commons, Colaton Raleigh and W o o d b u r y C o m m o n s and Venn Ottery Common plus other areas included at this revision.

In East D e v o n Area of Outstanding Natural Beauty. Parts are managed as non- s t a t u t o r y nature reserves. Mostly common land.D e s c r i p t i o n and Reasons for N o t i f i c a t i o n :

T h i s is the largest b lock of lowland heath in Devon. It is a nationally important

r e p r e s e n t a t i v e of the inland Atlantic-cliraate, lowland heathiands of Britain

and nor t h - w e s t Europe. A significant feature of the site is the diversity of

h e a th l a n d - a s s o c ia ted communities, related to its large area and the range of

s u b s t r a t e and topography. It also supports a wide range of birds and

i n v e r t e b r a t e s .

T h e site o v e r l i e s Triassic Bunter Pebblebeds, w i t h some New Red Sandstone and

P e r m i a n Marls, w i t h i n an altitude range of 70m to 150m. The higher .and drier

a r e a s are covered w i t h heath dominated by Heather (Calluna v u l g a r i s ), Bell Heather

(E r i c a c i n e r e a ), W e s t e r n Gorse (U l e x gallii), Bristle Bent-grass (Agrostis

c u r t i s i i ) and Purple Moor-grass (Molinia c a e rulea) . Grasses and Bracken (Pteridium

a q u i I i n u m ) are prevalent in places as a r e Bramble (Rubus fruticosus a g g .) and s c r u b w ith s c a t t e r e d Pines (Pinus s p p ) and Birches (Betula s p p ) .

A series of sh a l l o w valleys gives rise to distinct changes o f .vegetation. The

dry. heath gives w ay to wet heath with flushes o n the valley sides, and to valley

m i r e with patches of W i l l o w (Salix s p p ) scrub m a i n l y on the valley floors. Bell

H e a t h e r is rep l a c e d by Cross-leaved Heath (E. t e t r a l i x ) and characteristic species

ar e Common Sedge (Carex n i g r a ), M e a d o w Thistle (Cirsium d i s s e c t u m ), Lousewort

(P e d i c u l a r i s s y l v a t i c a ), B o g b e a n 1 (Menyanthes t r i f o l i a t a ), Heath Spotted Orchid

(D a c t y l o r h i z a m a c u l a t a ), Lesser Butterfly Orchid (Platanthera b i f o l i a ) and Sharp-'

f l o w e r e d Rush (Juncus acut i f l o r u s )♦ O ther species associated with the wetter

a r e a s are Bog Asphodel (Narthecium oss i f r a g u m ) , Sundews (Drosera s p p ), Pale

B u t t e r w o r t (Pingui c u l a lusitanica) , Bog Pimpernel (Anagallis t e n e l l a ), Common

C o t t o n - g r a s s (E r i o p h o r u m a n g u s t i f o l i u m ) and the Club-moss Lycopodiella i n undata.

M i n e r a l - r i c h flushes support Tawny Sedge (C. h o s t i a n a ), Carnation Sedge (C .

p a n i c e a ) „ Bog Rush (Schoenus n i g r i c a n s ) and Devil'srbit Scabious (Succisa

p r a t e n s i s ) together with the brown mosses Scorpidium s c o r p i o i d e s . C a m p y 1i urn

s t e 1 la turn and Drepanocladus r e v o l v e n s .

O v e r 70 b r e e d i n g bird species have been recorded notably Nightjar (Caprimulgus

e u r o p a e u s ) , H o b b y (Accipiter n i s u s ) and in most years Dartford Warbler. (Sylvia

u n d a t a ) . A m o n g the 21 breeding dragonfly species are the Small Red Damselfly

(C e r i a g r i o n t e n e 1 l u m ) , Southern Coenagrion (Coenagrion m e r c u r i a l e ) and the Downy

E m e r a l d (Cor d u l e a a e n e a ). The Bog Bush Cricket (Metrioptera b r a c h y p t e r a ) has

b e e n recorded here.

E A S T D E V O N P E B B L E B E D H E A T H S . lercOfT\b«iacoitle?.

DEVON

N O T E : A larger scale map, showing the definitive

boundary, is available on request

NATURE CONSERVANCY COUNCIL-. • Site boundary thus

Scale 1:50000' Metres

-h t -11 i1 !1 iYards 2000

B a se d on the O rdnance Su rvey 1 :5 0 0 0 0 map w i th the p e rm is s io n of the Contro lle r of Her M a je s ty 's S t a t io n e ry O ff ice C ro w n Copyright reserved 1986/9

B U D U E I G H & . S A L T E R T O N Ledge

Site Not i f i e d to the Secretary of S t a t e ----

o n 7 November "1986v n . f r t ,

CITATION SHEET. V

A

ICOUNTY: D E V O N SIXE NAME: HENSE MOOR MEADOWS ^

9

D I S T R I C T : E A S T DEVON

Status: Site of Special Scientific Interest (SSSI) notified under Section 28 |

of the W i l d l i f e a n d Countryside Act I98l(as amended)

Local P l a n n i n g Authority: Devon County Council, East Devon District Council

N a t i o n a l .G rid Reference: ST 173068 Area: 2 (ha) «(ac)

O r d n a n c e S u r v e y Sheet 1:50,000: 192 Is 10,000: ST 10 NE

D a t e N o t i f i e d (Under 1949 Act): - Date of Last Revision: _

D ate N o t i f i e d (Under 1981 Act): 1986 Date of Last Revision:

O t h e r Information:

A n e w site.

D e s c r i p t i o n and Reasons for Notification:

I

I

I

I

I

IT h i s site is comprised of three herb-rich meadows supporting a grassland community

w i t h a r e s t r i c t e d distribution in Britain and one which contains several local! species. T his sward, together with a fen community, thick hedges and scattered

trees, forms an area of exceptional wildlife value. |

The m e a d o w s , w h i c h have not been cultivated or treated with artificial fertilisers

’:Or h e r b i c i d e s for at least A0 years, lie on Keuper Marl on the lower east-facing

S l o p e s of the valley that cuts through the valley mire of Hense Moor SSSI. T h e !

soil is loamy, neutral to calcareous, well-drained over most of the site but w a t e r - ™

logged towards the tree-lined stream running at the base of the fields.

Th e sward o ver the freely-drained parts is characterised by frequent Common K n a p w e e d |

(Centaurea. n i g r a ), Crested D o g’s-tail (Cynosurus cris t a t u s ) and Meadow Vetchling

(L a t h y r u s p r a t e n s i s ). A wide range of other herb and grass species are p r e s e n t , a

i n c l u d i n g L a d y 's-mantle (Alchemilla v u lgaris). Cowslip (Primula v e r i s ), CoraraonM

S p o t t e d - o r c h i d • (Dactylorhiza f u c h s i i ), Green-winged Orchid (Orchis m o r i o ) and

Q u a k i n g - g r a s s (Briza m e d i a ) , all local species in Devon. Corky-fruited Water- d r o p w o r t (O e n a n t h e p i m p i n elloides) , a nationally-uncommon species, is abundant. Jj

The fen c o m m u n i t y near the stream is dominated by Rushes (Juncus s p p ), with abundant

M e a d o w s w e e t (Filipendula u l m a r i a ). Here plants such as the local Marsh V a l e r i a n H

(V a l e r i a n a d i o i c a ) occur, together with Marsh-Marigold (Caltha palustris), W a t e r J

H o r s e t a i l (E q u i s e t u m fluviatile) and Marsh Pennywort (Hydroc'otyle vulgaris). On d r i e r g r o u n d fringing this fen vegetation Meadow Thistle (Cirsium disaectum)

D e v i l ' s - b i t Scabious (Succisa p r a t e n s i s ), Betony (Stachys offi c i n a l i s ), G l a u c o u s I

Sedge (C a r e x ‘ f l a c c a ) and Carnation Sedge (Carex p a n i c e a ) ma y be found. ®

S p e c i e s - r i c h hedges surround the fields, overgrown and thick in places, whilstfl

an o pen stand of Pedunculate Oak. (Quercus r o b u r ) and As h (Fraxlnus excelsior)^

o c c u r ? in the central field. Under this grow woodland plants such as Wood Anemone

(A n e m o n e ■' n e m o r o s a ). Primrose (Primula v u lgaris) and Common Dog-violet (Violqw r ivi n i a n a ) , w hile Bluebell (Hyacinthoides n o n - s c r i p t u s ) is scattered ' throughout®

the site.

DEvor;

v " a /

> M<" ' ■-J >> 'x/'.'Xx f //C- - -v /'Xv. v : • . .1 j' / T & X v . _ £ ■ ) \v. 1 •. ■/■,{

\ \ x'----\\\ -’ ^ ) " - h ' T , 1, ' ^ ""{ / Secretary of Stntf V \ \ N u // \ r-/V ‘.;,; . /. on 22 October 19 ftY \ \ V a ■AV/' :,'iC 7 . .. '

.. ■G'>> 0 ./ /

Site Notified to the tate

6

\

^ ~ 7 \ l "p|1,'1& i

' « r V

% ' y A

\ / \ llfejtfL,.- V I ...' 7r%/AV; yn-'u''/ '

/ - x " • I I \ / < { ' . % = 18 / - - t

_ NATURE CONSERVANCY COUNCIL^Site boundary thus *-------------------Scale 1:10 0000 Metres

r % - - ' f m M :

600

’ î---- 1 i---- 1----1---- r0 Yards 6

Based on the O rdnance S u rv e y 1 :10 OOO map w i t h the p e rm is s io n ot the C o n tro l le r of Her M a je s t y ’ s S ta t io n e ry Office. C ro w n Cop yr ig h t re se rved 1986/8

COUNTY: DEVON SITE NAME; HENSE MOOR ' |

DISTRICT: EAST DEVON

Statue: Site of Special Scientific Interest (SSSI) notified under Section 28 of the |

Wildlife and Countryside Act 1981

Local Planning Authority: DEVON COUNTY COUNCIL,. EAST DEVON DISTRICT COUNCIL I

National Grid Reference: grj. 175030 Area: ^ 5 (ha) ,229 ■

Ordnance Survey Sheet 1:50,000: 192 1:10,000: ST 10 NE

Date Notified (Under 19^9 Act): 1969 Date of Last Revision: 1976 |

Date Notified (Under 1981 Act): 1984 Date of Last Revision:

Other Information: |

In Blackdown.Plateau Area of Great Landscape Value ^

Description:

Eense Moor includes some of the best remaining examples of lowland mixed valley bog in I Devon, and is typical of this habitat in South Western Britain.

Within an altitude range of between 150m and 210a, the valley supports a mosaic of differenl habitats. These are based on a variety of different soils derived from Keuper Marl on the I valley bottoms, Greensand on the sides and Clay-with-flints on the valley tops. Peat has formed where drainage has been most impeded. Around the valley groundwater seeps from the Greensand and several streams arise inland flow through the site. 1

At the junction between the Greensand and Clay-with-flints moss-dominated springs occur, _ Bog-mosses include Sphagnum papillosum and S«tenelluin. The site as a whole, supports a d i v e r B moss flora, some sixty species having been recorded..Associated herbs are Bog Asphodel ® (Narthecium ossifragum), Bog St.John's Vort (Hypericum elodes), Pale Butterwort (pinguicula lusitanicaJ, Great Sundew (Prosera anglica) and Bog Pimpernel (Anagallis tenella). |

Where wet heath grades into these boggy areas, Purple Moor-grass (Molinia caerulea) and Cross-leaved Heath (Erica tetralix) become more abundant, together with a variety of other h species, including Fir Clubmoss jjjycopodium selago), Round-leaved Sundew (p.rotundifolia) * I Long-leaved Sundew(D.intermedia), Tawny Sedge (carex hostiana), Camation-grass (C.panicea)« Heath Spotted Orchid (Dactylorhiza maculata) and Louaewort ^Pedicularis sylvatica). On more freely drained areas the wet heath has Purple Moor-grass and Dwarf FurzeyUlex gallii) as tft codominant species* ■

In some areas Rushes, in particular Hard Rush (juncus inflexus) become more abundant. Some ■ areas of this acid marshy grassland contain Marsh Helleborine (Bpipactis palustris), along | with Star Sedge (C.echinata) and Meadowsweet (Filipendula ulmaria). Greater Tussock Sedge (c.panicuata) forms well-developed stands in some areas near the main stream. «

Adding to the habitat diversity of the site are several wooded streams* Under a mixed canopy of Alder (Alnus glutinosa), Goat Willow (Salix caprea), Birch (Betula spp.) and pedunculate Oak (Quercus robur), the damp and shaded ground flora contains Golden Saxifrage (ChrysospleM.) oppositifolium), Ramsons (Allium uraimun) and Enchanter's Nightshade (Circaea lutetianaj . B

On the well-drained, steeper valley sides and tops dry heath has developed, dominated by ■ Dwarf Furze. This mixes in with areas dominated by Bracken (pterldium aquilinum) and scrub,^ most of which consists of Common Gorse (Ulex europaeus)and Bramble (Rubus fruticosus agg.).In some places on the flatter valley tops semi-improved grassland occurs. Main sward components are Yorkshire Fog(Holcus lanatus) and Sweet Vernal-gra3s(Anthoxanthum odoratum). BThe site’s wide variety of habitats in turn supports a rich invertebrate fauna including or particular note the Raft Spider(Dolomedes fimbriatua).Reptiles and amphibians are present


APPENDIX K

List of Possible Causes and Effects Raised by the River Otter Association

(ref: K 1 5 12 .C 01/R 4-007 , rev 2. printed 18 Feb 94)


APPENDIX K

LIST OF PO SSIBLE CAUSES AND EFFEC TS RAISED BY THE RIVER OTTER ASSOCIATION

This appendix lists the concerns raised by the River Otter Association with respect to possible causes and effects on the River Otter. These concerns have been raised in a number of documents:-

1 River Otter Association, July 1991. Submissions on River Otter Action Plan.

2 Brigadier Sheppard. March 1993. independent Water Resources Study on the River Otter.

3 A. Knights, August 1993. Letter to C. Tubb. NRA

List of Effects/Causes with source and status:

(ref: K1512.C01/R4-007, rev 2. printed 18 Feb 94)


APPENDIX K

U ST OF PO SS IBLE CAUSES AND EFFECTS RAISED BY THE RIVER OTTER ASSOCIATION

Item Effect Cause Reference Status

A Poor fish catches

InsufficientSpawningGrounds

1 Not addressed, additonal work required

B Poor migrating fish catches

Barriers to fish migration

1 Not addressed, additional work required

C Reduced ADF Abstraction. 1(request for graphs of ADF mg/Distance for 1970. 1980 & 1990)

Hydrology Section Data Available To be addressed through modelling in later work

D Reduced ADF Over abstraction from Otterhead Lakes

1 Partly addressed in Hydrology Section, seasonal analysis remains to be undertaken

E Q95 Flow not achieved in 1989 & 1990.

Over abstraction of groundwater

1 Partly addressed in Hydrology Section modelling and contour mapping of water table remains to be undertaken

F Failure of Water Quality Standards

Discharges, particularly in middle reaches

1 Partly addressed in Water Quality Section.Full analysis of discharges to be undertaken if data available

G Bank Erosion Over abstraction & low rainfall

1 Not addressed - No reliable data available

(ref: K IS ^ .C O I/R - i-O O ? . rev 2. printed 18 Feb 94) IMWKW-MB


Item Effect Cause Reference Status

H • OverAbstraction

GroundwaterAbstraction

2(1)request for listing of all licences)

Summary of data for abstraction on reach by reach availability. See Hydrology Section* and Tables 3.1.3 & 3.6.1

I OverAbstraction

All Abstraction 2 (2A)(request for graphical display of all abstraction)

Hydrology Section. 3.1.2 addresses this extensively

J OverAbstraction

Water Table Fluctuations relative to Bed Level

8* (3)(request for water table level in 1976 & 1992)

See discussion in Appendix L of report

K Declining Flow Abstraction/RainfaII?

2(4)(request for average annual flow 1970-1992)

Hydrology Section 3.1.4

. L - Declining Rainfall 2(5)(request for plot of annual rainfall)

Hydrology Section 3.1.3

M Increase in Discharge

2 (6)(request'for plot of discharge as % of flow)

Not addressed. Inadequate data

N 2 (7)Patterns of flow fromFennybridges to Otterton in 1976 & 1989

See Section 3.1.4 addressed flow at Fenny Bridges and Dotton overstudy period

0 Low Flow Despite normal rainfall

3 Addressed extensively in Hydrology Section

(ref: K1512.C01/R4-007. rev 2, printed 10 Feb 94) IMWKWBE


APPENDIX L River and Ground Water Levels

{ref: K 1 512.C O 1/R 4-007. rev 2. printed 18 Feb 94) I FiM ETO W S


APPENDIX L

The following figure shows the ground water level profile parallel to the River Otter from Fenny Bridges to its mouth at Budleigh Salterton. End of August water levels are displayed for a number of years. The ground water levels are defined by a limited number of points and therefore do not constitute a continuum. The plot should be interpreted with great caution for a number of reasons. Firstly, there is no hydrogeology on the plot. It is therefore impossible to say whether the river is in hydraulic continuity with the aquifer at any one point. The ground water levels in the aquifer may be significantly affected if it is locally confined. It is uncertain whether enough information currently exists to ascertain which sections of the river are in continuity with the aquifer and which are not. Secondly, the number of points used to derive the ground water profile is extremely limited, partly due to time limitations in producing the plot and partly due to a lack of suitable observation wells along the river. The horizontal resolution of the ground water profile is therefore very coarse. Thirdly, the river bed profile has been taken from the contours on the Ordnance Survey 1:50,000 map of the area. River bed levels are therefore unlikely to be accurate to more than about 5-metres. This is more than the annual fluctuation experienced by most boreholes in the catchment. The comparison therefore becomes almost meaningless unless more accurate elevation data are available for the river bed. For those reasons, the plot has been excluded from the main body of the report.

{ref: K1512.C01/R4-007. rev 2. printed 18 Feb 94) BEEBEE

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Additional copies are available at

£2.50 for Volume 1 £5.00 for Volume 2 £12.00 for Volume 3 £8.00 for Volume 4

(inclusive o f postage and packing from :

National R ivers Authority South Western Region ManJey House Kestrel W ay Exeter EX2 7LQ

Cheques should be made payable to : National Rivers Authority

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