HATER-QUALITY DATA FOR ORWELL RESERVOIR AMD THE OTTER TAIL RIVER
NEAR FERGUS FALLS, MINNESOTA
By M. R. have and L. H. Tomes
A Compilation or Data collecteci by the U. S. Geological Survey
U. S. GEOLOGICAL SURVEY
Open-File Report 87-537
Prepared in cooperation with the
U. S. ARMY CORPS OF ENGINEERS
St. Paul, Minnesota
1987
DEPABTMEMT OF THE IMTBRIOB
DONALD PAUL HODEL, Secretary
U.S. GEOLOGICAL SUOTEI
Dallas L. Peck, Director
For additional information, write to:
District Cnief U.S. Geological Survey 702 Post Office Building St. Paul, Minnesota 55101
Copies of tnis report can be purchased from:
U.S. Geological SurveyBooks and Open-File Reports SectionFederal Center, Building 41Box 25425Denver, Colorado 80225
iii
CONTENTS
Page
Abstract.................................................................... 1Introduction................................................................ 1Purpose and Scope........................................................... 2Location and environmental setting.......................................... 2Previous investigations..................................................... 4Methods of collection and analysis.......................................... 4References.................................................................. 6Appendix: Water-quality data................................................ 7
ILLUSTRATIONS
Figure 1. Map showing location of the sample sites on Orwell Reservoir and Otter Tail River...................
TABLES
Table 1. Vertical profile data for Orwell Reservoir........................ 82. Turbidity, transparency, alkalinity, nutrient, and chlorophyll
data for Orwell Reservoir....................................... 163. Quality of runoff from fields to Orwell Reservoir at site 5....... 214. Phytoplankton data for Orwell Reservoir........................... 225. Water-quality data for the inflow site to Orwell Reservoir........ 426. Water-quality data for the outflow site from Orwell Reservoir..... 437. Mean-daily streamflow for the inflow site to Orwell Reservoir,
April 2, 1985 to September 30, 1985............................. 468. Mean-daily streamflow for the inflow site to Orwell Reservoir,
October 1, 1985 to September 30, 1986........................... 479. Mean-daily streamflow for the outflow site from Orwell Reservoir,
water year April 1, 1985 to September 30, 1985.................. 4810. Mean-daily streamflow for the outflow site from Orwell Reservoir,
October 1,1985 to September 30, 1986.......................... 49
CONVERSION FACTORS AND ABBREVIATIONS
Readers who may prefer to use metric (International System; units rattier than the inch- pound units can make conversions using the following factors:
Multiply inch- pound unit By To pb tain me t r ic unit
inch (in.) 25.4 millimeter (mm)
foot (ft) 0.3048 meter (m)
mile (mi) 1.609 kilometer (km)
acre-foot (acre-ft) 1,233 cubic meter (n»3)
cubic foot per second 0.02832 cubic meter persecond
ton, short 0.9072 meg a grain (Mg)
Temperature in degrees Fahrenheit (°F) can be converted to degrees Celsius (°C) as follows:
°C = 5/9 x (°F-32)
HATKfi-QUALITI DATA FOB ORWELL BESEBYOIB AND THE OTTEB TAIL BJVEBNEAB FEBGUS FALLS, MINNESOTA
A compilation of data collected by the U. S. Geological Survey
By M. B. Have and L. U. Tornes
ABSTRACT
Water-quality data were collected at five sites on Orwell Beservoir and two sites on the Otter Tail River, at the inflow and outflow points of the reservoir. The data, collected from April 1983 to July 1966, consist mainly of streamflow and nutrient concentrations at the river sites and nutrient concen trations, alkalinity, Secchi-disk transparency, phytoplankton counts, chloro phyll concentrations, and profiles of specific conductance, temperature, pU, and dissolved oxygen at the reservoir sites. Additional data collected at the outflow site include alkalinity and concentrations of major ions and organic carbon.
IMTBODUCTION
Orwell Dam was constructed in 1953 to impound water during floods and to release water for water supply and pollution abatement during dry or low-flow periods.
In 1984-85, the U.S. Army Corps of Engineers did a study called BOPE (Beservoir Operating Plan Evaluation) for Orwell Beservoir (U.S. Army Corps of Engineers, 1985). The objectives of the BOPE study were to:
1. Determine how well the original operating plan for Orwell Beservior contributes to the presently authorized purposes.
2. Identify other resources or project purposes that operation of Orwell Beservoir might significantly affect.
3. Formulate and evaluate alternative reservoir operating plans to optimize benefits.
4. Consider minor structural modifications to enhance beneficial effects of reservior operation.
5. Report findings and make tentative recommendations.
As a result of the BOPE study, a new operating plan for Orwell Beservoir was proposed. An important aspect of the proposed plan is that changes in pool level would be relatively minor compared to changes under the original operating plan. Thus, the new plan would increase fisheries potential, recreational opportunities, and shoreline protection. The new plan was implemented for testing in the spring of 1986. Data for 1985 were collected while the original operating plan was in effect. Data for 1986 were collected while the new operating plan was in effect.
Tne U.S. Army Corps of Engineers has developed several computer models tnat can predict chemical loading to lakes and changes in quality of lake water following a change in reservoir operations, given the required water-quality data for input to the models. Because of the change in operations at Orwell Reservoir, the St. Paul District Corps of Engineers requested that the U.S. Geological Survey provide assistance by determining the quality of water in the reservoir.
PURPOSE AMD SCOPE
This report presents data collected at five sites on Orwell Reservoir and two sites on the Otter Tail River.
The scope of the water-quality study included:
1. Inflpw_s>i.te monthly sampling from April to September 1985, a winter sample collected in February 1986, and samples collected in April and May 1986 during spring runoff. Samples were collected bi-weekly by the damtender for determination of total phosphorus to augment monthly data. Onsite determinations during monthly visits included streamflow, specific conductance, water temperature, ph, and dissolved oxygen. Monthly samples were analyzed for concentrations of nitrogen and phosphorus.
2. Ou_tf_lpw_.sj._te sampled at the same frequency as at the inflow site, except no biweekly samples were collected. Onsice determinations were the same as those made at the inflow site, plus alkalinity. Samples were analyzed to determine concentrations of selected nitrogen and phosphorus species, organic carbon, major ions, and dissolved solids.
3» Fj-ve_Lake_sites sampled monthly from April to September 1985, and February, May, and July 1986. Onsite determinations included specific conductance, water temperature, pH, dissolved oxygen, and measurement of concentrations of nitrogen and phosphorus species, chlorophyll a and b, phytoplankton identification, and turbidity.
LOCATION AND ENVIBOMMEMTAL SETTING
Orwell Reservoir is in Otter Tail County in west-central Minnesota, about 180 miles northwest of the Minneapolis - St. Paul metropolitan area and about 6 miles southwest of Fergus Falls. The reservoir and the sampling sites are shown in figure 1. The reservoir is on the Otter Tail River, 38.6 river miles upstream of the point where the Otter Tail and Bois de Sioux Rivers combine to form the Red River of the North. It has a gross storage capacity of 14,100 acre-feet and a useful capacity of 13*100 acre-feet, which is approximately the volume of a 10-year flood (U.S. Army Corps of Engineers, 1963J.
96Q 11'30 J 10'30" 9'30" 8'30' 7'30' 96°6'30"
46°14
46°H'
Dayton Hollow Oam
Inflow
Base from U. S. Geological Survey Dayton Hollow Dam 1:24,000, 1973 and Orwell Lake 1:24,000, 1973
V2 1/2 MILE
.5 .5 KILOMETER
EXPLANATION
1V SAMPLING SITE
Figure 1.--Location of the sample sites on Orwell Reservoir and Otter Tail River
The drainage area above Orwell Dam is approximately 1,830 square miles. The headwaters are in the morainic hiLls of southwestern Clearwater County approximately 90 miles northeast of the reservoir. From the headwaters to Orwell Reservoir, the river flows through an extensive network of lakes and depressions. Above river mile 40, the river runs through rolling hills; whereas, below river mile 22, the topography is nearly flat. Between these two distinct areas lies a transition zone in which the dam and most of the reservoir is located. This transition zone is composed of a series of beach ridges that were formed by Glacial Lake Agassiz.
The basin is underlain by as much as 500 feet of glacial drift composed of a heterogeneous mixture of clay, sand, gravel, and boulders. Along the Otter Tail River and its tributaries, the channel slope and flow are sufficient to permit development of hydroelectric power.
The climate in the area consists of cold winters and warm summers. Average temperatures at the Fergus Falls weather station in January and July are 5.9 and 80.0°F, respectively. Average annual precipitation is 23.5 inches per year (National Oceanic and Atmospheric Administration, 1985).
Grain farming is the dominant agricultural activity, although diversified farming, including dairying, is becoming more prevalent. About 1,870 acres around and including Orwell Reservoir are leased to the Minnesota Department of Natural Resources for wildlife management. Numerous waterfowl species use the reservoir during migration. Non-game bird species of interest that may occur at the reservoir include the bald eagle, osprey, white pelican, sandhill crane, and common loon.
PREVIOUS INVESTIGATIONS
A limnological survey of Orwell Reservoir was done in 1978-79 by personnel from the University of Minnesota (Megard, 1980). The survey included several reservoirs, most of which were sampled eight times and analyzed for concentrations of major ions and nutrients. Secchi-disk transparency was measured during each sampling visit.
Water-quality data were collected from the outflow site by the U.S. Geological Survey in the 1960's. These data are included in this report for comparison.
METHODS OF COLLECTION AND ANALYSIS
Water at the inflow and outflow sites was well mixed; therefore, samples were collected at one vertical located near the center of the channel. Samples were depth integrated and bottles were filled in the stream directly or, if a suspended-sediment sampler was used, the water was transferred to a splitter and the bottles were filled from the splitter. Specific conductance, temperature, pH, and dissolved oxygen were measured with a Hydrolab 1 model 4041 portable four-parameter instrument. Streamflow during monthly sampling visits was determined with a current meter at the inflow site and determined from the
stage-discharge rating at the outflow site according to the methods of Carter and Davidian (1968). Mean-daily streamflow at the inflow site was calculated from the mean-daily outflow discharge and changes in reservoir storage.
At the reservoir sites, a white, 20-centimeter Secchi disk was used to determine transparency. Specific conductance, temperature, pii, and dissolved oxygen were measured with the portable four-parameter instrument. A peristaltic pump was used to collect depth-integrated water samples by moving the orifice of the tube through the euphotic zone, which was determined by doubling the Secchi-disk reading.
The portable four-parameter instrument was calibrated at the beginning of each sampling day and checked at the end of the day. Reservoir sites 2 and 5 were not sampled as often as the other reservoir sites because they were riverine or dry during periods of low water levels in the reservoir. All field and laboratory determinations were made using standard U.S. Geological Survey methods. References detailing the various methods include Greeson and others, 1979a and 1979&; Fishman and Friedman, 1985; Rantz and others, 1982; and Wershaw and others, 1983. Phytoplankton taxa were determined using the membrane filter method (McNabb, 1960) on samples preserved with Lugol's solution (Greeson and others, 1979a) by Aquatic Analysts of Portland, Oregon.
use of a trade name in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey.
BEFEBEMGES
Carter, R. W., and Davidian, Jacob, 1968, General procedures for gaging streams: U.S. Geological Survey Techniques of Water-Resources Investi gations, Book 3,Chapter A6, 13 P*
Fishman, M. J. and Friedman, L. C., 1985, Methods for determination of inorganic substances in water and fluvial sediments: U.S. Geological Survey Open-File Report 85-495, 709 p.
Greeson, P. £., Ehlke, T. A., Irwin, G. A., Lium, B. W., and Slack, K. V., 1979a, Methods for the collection and analysis of aquatic biological and microbiological samples: US. Geological Survey Techniques of Water-Re sources Investigations, book 5, chap. A4, 332 p.
Greeson, P. £., Ehlke, T. A., Lium, B. W., Shoaf, W. T., Radtke, D. B., and Sohn, I. a, 1979b, A supplement to methods for collection and analysis of aquatic biological and microbiological samples (U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, chap. A4): U.S. Geological Survey Open-File Report 79-1279, 92 p.
McNabb, C. D., 1960, Enumeration of fresh-water phytoplankton concentrated on the membrane filter: Limnology and Oceanography, v. 5, P* 57-61.
Megard, R. 0., 1980, Limnological survey of reservoirs in Minnesota, North Dakota and Wisconsin operated by the St. Paul District U.S. Army Corps of Engineers - Part I: U.S. Army Corps of Engineers, 81 p.
National Oceanic and Atmospheric Administration, 1985, Climatological data, annual summary: Minnesota, 1984, v. 90, no. 13, 38 p.
Rantz, S. E. and others, 1982, Measurement and computation of streamflow: vol. 1 measurement of stage and discharge and vol. 2 computation of discharge: US. Geological Survey Water-Supply Paper 2175, 631 p.
U.S. Army Corps of Engineers, 1963, Flood control and water conservation Otter Tail River, Minnesota Red River of the North watershed Orwell Dam and Reservoir - Reservoir regulation manual: 91 P«
US. Army Corps of Engineers, 1985, Orwell Reservoir operation plan evaluation, draft, 154 p.
Wershaw, R. L., Fishman, M. J., Grabbe, R. R., and Lowe, L. E., 1983, Methods for the determination of organic substances in water and fluvial sediments: U.S. Geological Survey Open-File Report 82-1004, 173 P*
APPENDIX
Water-Quality Data
Table 1. Vertical-profile water-quality data for Orwell Reservoir
[uS/cm, microsiemens per centimeter at 25° Celsius; mg/L, milligrams per liter]
Date
April18...18...18...
May15...15...15...
June18...18...18...18...18...
July24...24...24...24...24...
August29...29...29...29...29...29...
September24...24...24...24...
Time
15:2015:2115:23
15:4115:4215:43
17:0117:0217:0317:0417:05
16:1116:1216:1316:1416:15
15:2015:2115:2215:2315:2415:25
16:3516:3616:3716:38
Samplingdepth
(feet)
2.04.05.0
1.03.06.5
1.05.0
10.015.020.0
1.03.09.0
15.017.0
1.03.06.09.0
12.015.0
1.05.0
10.016.0
Specificconductance
(uS/cm)
Site
198
386386386
390390390
378378378379379
356356356356356
360359359358358359
360358358360
PH(stand
ardunits)
1
5
8.38.28.2
8.18.18.1
8.28.28.28.28.2
8.28.28.28.28.2
7.97.97.97.97.97.8
8.08.08.08.0
Temperature
(degreeCelsius)
12.512.012.0
16.016.016.0
19.519.519.519.519.0
23.023.023.023.023.0
20.019.519.519.519.519.5
13.013.013.013.0
Oxygen,dis
solved(mg/L)
9.69.09.0
8.08.18.0
9.19.08.88.88.3
8.27.97.87.77.7
8.88.28.07.97.87.7
9.89.89.79.5
Oxygen, dissolved(percentsaturation)
928585
838483
10099979790
9894939292
989088878685
94949391
Table 1. Vertical-profile data for Orwell Reservoir Continued
Date Time
Samplingdepth
(feet)
Spe cificcon phduct- (stand-ance
(uS/cm)ard
units)
Temperature
(degreeCelsius)
Oxygen,dis
solved(mg/L)
Oxygen, dis
solved(percentsaturation)
Site 1 Continued
February26...26...26...
May01...01...01...01...
July22...22...22...22...22...22...
13:4513:4813:50
13:4513:4613:4713:48
13:0013:0113:0213:0313:0413:05
4.06.06.5
2.010.015.019.5
1.03.06.0
10.015.017.0
1986
414414414
395395395396
380380383384384384
8.08.07.9
8.38.38.38.3
8.78.68.48.48.28.2
0.00.00.0
10.010.010.010.0
27.026.026.025.525.025.0
11.711.711.7
10.810.610.610.6
10.910.59.18.67.57.3
818181
95939393
138130113106
9189
Site 2
June18...18...18...18...18...
July24...24...24...24...24...
16:3016:3116:3216:3316:34
15:3615:3715:3815:3915:40
1.03.06.09.0
13.5
1.03.06.09.0
12.0
1985
376376377377377
356357358358362
8.18.18.28.28.2
8.28.28.28.28.1
19.519.519.519.519.5
23.023.023.023.023.0
9.59.19.09.09.0
7.67.67.87.57.3
105100
999999
9191938987
Table 1. Vertical-profile data for Orwell Reservoir Continued
Date
August29...29...29...29...29...
September24...24...24...
May01...01...01...01...01...
July22...22...22...22...22...
Time
14:5014:5114:5214:5414:55
16:1016:1116:12
13:2013:2513:3013:3113:32
12:1512:1612:1712:1812:19
Samplingdepth
(feet)
1.03.06.09.0
11.0
1.04.07.0
2.05.0
10.015.017.0
1.03.05.08.0
10.0
Specificconductance
(uS/cm
Site_2_
360360361362363
348352355
392393394394394
383384384383383
PH(stand
ard) units)
rrCojntinuea
1985
7.97.97.98.07.9
8.08.08.0
1986
8.48.48.48.48.4
8.08.08.07.97.9
Temperature
(degreecelsius)
20.019.519.519.519.5
13.013.013.0
10.510.510.510.510.5
26.526.025.025.025.0
Oxygen ,dis
solved(mg/L)
8.48.07.77.77.3
10.210.110.1
10.810.710.610.610.6
8.68.37.77.26.9
Oxygen, dissolved(percentsaturation)
9388858580
989797
9695949494
108103
948884
10
Table 1. Vertical-profile data for Orwell Reservoir Continued
Date
April18...18...18...18...18...
May15...15...15...15...15...
June18...18...18...18...18...18...
July24...24...24...24...24...24...
Time
14:4514:4614:4714:4814:49
16:1116:1216:1316:1416:15
17:3117:3217:3317:3417:3517:36
17:2917:3017:3117:3217:3317:34
Samplingaeptn
(feet)
2.04.06.08.0
10.0
1.03.06.09.0
10.5
1.05.0
10.015.020.025.0
1.03.06.0
12.018.023.0
Specificcon PHduct- (stana-ance ard
luS/cm) units)
Srte_3
1985
397397397397398
390390390390390
378381380381381360
360362362363363364
8.28.28.28.28.2
8.18.18.18.18.1
8.38.38.38.38.38.3
6.38.38.38.38.28.0
Temperature
(degreeCelsius)
11.011.011.011.010.5
16.016.016.016.016.0
19.019.019.019.019.019.0
23.523.523.523.523.523.5
Oxygen,dis
solved(mg/L)
10.310.310.39.37.9
8.67.77.67.37.6
9.29.09.19.09.19.0
6.28.07.87.77.55.7
Oxygen, dissolved(percentsaturation)
9595956672
8960797679
1009899989998
999694939069
11
Table 1. Vertical-profile data for Orwell Reservoir Continued
Date
Sampling
Time depth(feet)
Specificconductance(uS/cm)
PH(stand
ardunits)
Temperature(degreeCelsius)
Oxygen ,dis
solved(mg/U
Oxygen, dissolvedI percentsaturation)
1985
August29...29...29...29...29...29...29...
September24...24...24...24...24...
16:2616:2716:2816:2916:3016:3116:32
17:3017:3117:3217:3317:34
1.03.06.09.0
12.015.018.0
1.04.0
10.015.016.0
362363364366366366369
360360360362362
8.07.97.97.97.97.97.9
8.18.18.18.18.1
20.020.020.019.519.519.519.5
13.513.513.513.513.5
8.98.68.18.18.18.17.7
10.110.19.99.79.7
99959089898985
9898969494
1986
February26...26...26...
May01...01...01...01...
July22...22...22...22...22...22...
14:4514:4614:47
15:0315:0415:0515:06
14:3014:3114:3214:3314:3414:35
3.06.0
10.0
2.010.020.026.0
1.03.06.0
10.014.016.0
411412418
398396398398
376378379382384384
8.08.07.9
8.38.38.38.3
8.78.78.78.58.58.5
0.00.00.5
9.59.59.59.5
28.028.026.026.025.525.5
11.311.311.3
11.611.311.110.9
12.212.311.89.68.88.9
797980
101989795
157158146119108109
12
Table 1. Vertical-profile data for Orwell Reservoir Continued
Date
April18...18...18...18...
May15...15...15...15...
June18...18...18...18...18...
July24...24...24...24...24...24...24...24...
August29...29...29...29...29...29...29...
Time
14:0014:0214:0314:04
16:3616:3716:3816:39
18:0018:0118:0218:0318:04
18:0018:0118:0218:0318:0418:0518:0618:07
16:5716:5816:5917:0017:0117:0217:03
Samplingdepth
(feet)
2.04.06.07.0
1.06.0
15.018.5
1.05.0
10.015.026.0
1.03.06.0
12.018.024.028.032.0
1.03.06.09.0
15.021.027.0
Specificconduct- (ance
(uS/cm)
Site
1985
394395395397
387367388388
380380380381381
361362365364365365369378
368369369369369369368
pHstandard
units)
4
8.38.48.48.4
8.16.18.18.1
8.38.38.38.38.3
8.48.48.48.48.48.48.26.0
8.08.08.07.97.97.97.9
Temperature
(degreecelsius)
11.511.511.511.5
16.016.016.016.0
19.019.019.019.019.0
23.523.523.523.523.523.523.523.0
20.020.019.519.519.519.519.5
Oxygen,dis
solvedCmg/L)
10.910.910.910.9
7.67.57.67.4
9.19.19.19.09.0
8.98.78.58.58.48.36.42.3
9.69.38.38.16.18.07.4
Oxygen, dissolved(percentsaturation)
102102102102
79787977
9999999698
1071051021021011007727
106103
9189698881
13
Table 1. Vertical-profile data for Orwell Reservoir Continued
Sampling
Date Time depth(feet)
Specificconductance(uS/cm)
pH(standard
units)
Temperature(degreeCelsius)
Oxygen,dis
solved(mg/L)
Oxygen, dissolved(percentsaturation)
Site 4 Continued
1985
September24...24...24...24...24...24...24...
17:5017:5117:5217:5317:5417:5517:56
1.05.0
10.015.020.025.027.0
354356360360360361361
8.18.18.18.18.18.18.1
14.014.014.014.014.014.014.0
9.49.89.69.79.69.69.5
92969495949493
1986
February26...26...26...26...26...
May01...01...01...01...
July22...22...22...22...22...22...22...
15:4515:4615:4715:4815:49
15:2115:2315:2515:26
14:5014:5114:5214:5314:5414:5514:56
3.06.09.0
12.016.0
2.05.0
20.025.0
1.03.06.0
10.015.019.021.7
416418419419424
398398398399
379378379383383382384
7.87.87.87.87.8
8.38.38.38.3
8.68.78.78.58.58.58.5
0.00.00.00.00.0
9.59.59.59.5
27.527.526.025.525.525.525.5
11.611.211.211.210.8
11.111.011.011.0
10.610.611.48.88.68.58.4
8178787875
97969696
135135141108106104103
14
Table 1. Vertical-profile data for Orwell Reservoir Continued
Date
June19...19...
July24...24...24...24...
August29...29...29...
September24...
May01...01...01...
July22...22...22...
Time
08:2808:29
16:4516:4616:4716:48
15:5415:5515:56
17:05
14:1514:1614:17
13:4513:4613:47
Samplingdeptn
(feet)
1.03.0
1.03.06.08.0
1.03.04.5
1.5
2.05.09.0
1.03.05.6
Specificcon pHduct- (stana-ance ara
(pS/cia) units)
Si_te_5
1985
520521
496496496497
725732734
567
1986
502503503
610637650
8.18.0
8.08.08.08.0
8.18.18.0
8.2
8.38.38.4
9.38.98.7
Temperature
(degreecelsius)
18.017.5
23.023.023.023.0
19.519.019.0
11.5
9.09.09.0
28.525.525.0
Oxygen,dis
solved(mg/L)
7.87.8
4.54.24.03.8
10.17.95.3
12.5
12.411.811.6
22.18.34.5
Oxygen, dissolved(percentsaturation)
8483
54504845
1118658
116
107102100
28710255
15
Tabl
e 2.
Tur
bidi
ty,
tran
spar
ency
, alkalinity,
nutr
ient
, and
cnloropnyll
data f
or O
rwel
l Be
aerv
olr
[NTU
, ne
phel
ooet
ric
turbidity
unit
s; m,
me
ters
; mg/L,
mill
igra
ms p
er l
iter
; ug/L,
micr
ogra
ms p
er l
iter
; , no d
ata]
Dis
solv
ed
Nit
roge
n
Dat
e
Apr
198
51
8...
May 15...
Jun 18...
Jul
24
...
Aug 29
...
Sep 24
...
Feb
1986 26
...
May 01
...
Jul
22
...
Tim
e
15:1
5
15:4
0
17:0
0
16:2
0
15:3
0
16:3
0
14:0
0
13:4
4
13:0
6
Res
er-
Tur
- voir
bid
- de
pth
ity
(feet)
(N
TU)
3.5
5.1
2.5
2.9
2.5
1.7
7.1
1.9
20.0
5.2
18.1
1.
6
Tra
ns
par
en
cy
Car
- B
icar
- (S
ecch
i bo
nate
bo
nate
dis
k)
(mg/
L
(mg/
L a
s (m
) as
C03
) HC
03)
0.8 .7 .9 1 .2
1 .2 1.2
__
.8 1.1
6.0
207
Alk
a
linit
y
(mg/
L a
s C
aC03
)
Sit
e_1
188
187
188
190
190
181
214
187
180
Nit
rite
pl
us
nit
rate
(m
g/L
as
N)
<0.
10 .24
< .1
0
< .1
0
.13
< .1
0
.13
.10
< .1
0
Am
mon
ia
(mg/
L
as N
)
0.0
5
.25
.04
.03
< .0
1
.17
.12
.06
.04
Am
mon
ia
plu
s org
anic
(m
g/L
as
N)
0.6
1.0 .9 .2 .4 .6 .7 .6 .6
Pho
spho
rus
Tota
l (m
g/L
as
P)
0.0
8
.06
.07
.04
.06
.05
.03
.03
.06
Dis
so
lved
ort
bo
(mg/
L
as P
)
0.03 .0
5
.03
.02
< .0
1
.05
< .0
1
< .0
1
.02
Chl
oro
p
hy
ll a
(u
g/L
)
3.20
3.10
1.70
9.80
2.30
84.0 1.30
6.40
39.0
Chl
oro
phyll
b
(pg/
L)
<0.
10
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
.40
5.1
0
Tab
le 2
. T
urb
idit
y,
tran
spar
ency
, alk
ali
nit
y,
nu
trie
nt,
an
d ch
loro
ph
yll
dat
a fo
r O
rwel
l fi
eaer
voir
Con
tin
ued
Dis
solv
ed
Nit
rogen
Dat
e
Jun
1985 18...
Jui
24...
Aug 29
...
Sep 24
...
May
19
86 01
...
Jul
22...
Tun
e
16:2
5
15:4
5
15:0
0
16:0
0
13:1
9
12:2
0
Res
er-
Tu
r-volr
b
id-
dep
th
ity
(feet)
(N
TH)
1.5
4.5
2.0 1.5
17.5
4.7
11.0
2.2
Tra
ns
par
en
cy(S
ecch
id
isk
)(m
) 1.1
1.2 1.0
1.5 .8 .8
Car
- B
icar
- A
lka-
bo
nat
e bonat
e ii
nit
y(m
g/L
(m
g/L
as
(m
g/L
as
as
C03
) H
C03
) C
aC03
)
Sit
e 2
191
190
190
185
193
0 22
6 1 8
5
Nit
rite
plu
sn
itra
te(m
g/L
as
N)
<0.
10
< .1
0
.11
< .1
0
.11
.15
Am
mon
ia(m
g/L
as
N)
0.0
2
.05
< .0
1
.20
.06
.05
Am
mon
iaplu
sorg
anic
(mg/
Las
N
)
1.1 .3 .5 .5 .6 .9
Pho
spho
rus
Tota
l(m
g/L
as
P)
0.0
7
.04
.06
.08
.04
.07
Dis
so
lved
ort
ho
(mg/
Las
P)
0.0
3
.03
< .0
1
.04
< .0
1
.03
Ch
loro
phyll
a
(pg/
L)
1.80
4.30 .9
0
2.9
0
5.90
16.0
Ch
loro
p
hy
ll
b(p
g/L
)
<0.
10
< .1
0
< .1
0
< .1
0
.40
2.6
0
Tabl
e 2.
Tur
bidi
ty,
tran
spar
ency
, alkalinity,
nutr
ient
, and
chlorophyll
data
for O
rwel
l Be
serv
oir
Cont
inue
d
CO
Dis
solv
ed
Nit
roge
n
Dat
e
Apr
198
518...
May 15
...
Jun 18
...
Jul
24...
Aug 29
...
Sep 24...
Feb
1986 26...
May 01
...
Jul
22...
Res
er
voir
Tim
e de
pth
(fee
t)
14:4
0
16:1
0
17:3
0
17:4
0
16:4
0
17:2
5
15:0
0 10
.9
15:0
2 27
.0
14:3
6 17
.2
Tur
bi
dit
y(N
TU)
1.6
1.1
4.3
2.5
1.5
1.5
1.4
7.4 1.5
Tra
ns
par
en
cy(S
ecch
idis
k)
(m)
0.5 .6 .9 1.0
1.2
1.0 .8 1.0
Car
- B
icar
- A
lka-
bona
te
bona
te
Un
ity
(mg/
L
(mg/
L a
s (m
g/L
as
as
C03
) HC
03)
CaC
03)
.to
192
184
1 94
1 90
190
1 90
0 27
1 22
2
190
12
204
187
Nit
rite
plu
snit
rate
(mg/
Las
N
)
<0.
10 .17
< .1
0
< .1
0
< .1
0
< .1
0
.13
< .1
0
< .1
0
Am
mon
ia(m
g/L
as
N)
0.07 .1
3
.02
.05
< .0
1
.20
.12
.04
.06
Am
mon
iaplu
sor
gani
c(m
g/L
as N
)
0.6
3.0 .6 .4 .4 .6 .6 .5 .9
Pho
spho
rus
Tota
l(m
g/L
as
P)
0.07 .0
7
.06
.05
.07
.07
.02
.05
.06
Dis
so
lved
ort
ho
(mg/
Las
P)
0.0
2
.04
.02
.04
.04
.04
< .0
1
< .0
1
.02
Chl
oro
ph
yll
a((
Jg/L
)
5.20
4.80
1.10
8.50
8.00
7.90 .6
0
19.0
15.0
Chl
oro
phyll
b
(pg/
L)
<0.
10
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
.60
1.30
Table 2. Turbidity, transparency,
alka
lini
ty,
nutr
ient
, and
chlo
roph
yll
data for O
rwell
Rese
rvoi
r Co
ntin
ued
Dis
solv
ed
Nit
rogen
Dat
e
Apr
19
85 18...
May 15...
Jun 18...
Jul
24
...
Aug 29..
.S
ep 24
...
Feb
1986 26
...
May 01
...
Jul
22
...
Res
er
vo
irT
ime
dep
th(f
eet)
13:5
5
16:3
5
17:5
5
18:1
5
17:1
0
17:4
5
16:0
0 17
.0
15:2
0 26
.0
14:5
7 2
2.7
Tu
rbid
it
y(N
TU)
7.3
7.1
2.7
2.0
2.0
2.0 1.5
6.9
2.0
Tra
ns
par
en
cy(S
ecch
id
isk
)(m
)
0.5 .6 1.0
1.0
1.2 1.1 .8 1.5
Car
- B
icar
- A
lka-
bonat
e bonat
e U
nit
y(m
g/L
(m
g/L
as
(mg/
L a
sas
C0
3)
HC0
3)
CaC
03)
Sit
e_4
1 90
185
1 92
200
1 80
1 88
0 27
6 22
6
1 89
1.0
223
185
Nit
rite
plu
sn
itra
te(m
g/L
as
N)
<0.
10 .13
< .1
0
.17
.11
.13
< .1
0
< .1
0
Am
mon
ia(m
g/L
as
N)
0.0
4
.15
< .0
1
.05
< .0
1
.13
.04
.05
Am
mon
ia
plu
sorg
anic
(mg/
Las
N
)
1.1 .7 .6 .3 .7 .7 .5 .7
Pho
spho
rus
To
tal
(mg/
Las
P)
0.0
5
.07
.06
.04
.07
.07
.02
.05
.06
Dis
so
lved
ort
ho
(mg/
Las
P)
0.0
2
.05
.01
.04
< .0
1
< .0
1
< .0
1
.02
Chl
oro
-phyli
a
(fjg
/L]
6.5
0
6.0
0
6.2
0
21.0 8.90
11.0 .8
0
25
.0
35
.0
Chlo
ro
ph
yll
b
(pg/L
)
<0.
10
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
1.00
3.1
0
Table 2. Turbidity,
tran
anar
onoy
, al
kali
nity
, nutrient,
and
onloropnyll
data for O
rwel
l Be
aerv
olr
Cont
inue
d
Dis
solv
ed
Nit
roge
n
Dat
e
Jun
1985 19
...
Jul
24
...
Aug 29
...
Sep 24
...
May
19
86 01
...
Jul
22
...
Res
er
voir
Tim
e de
pth
(feet)
08:2
7
16:5
0
16:0
0
17:0
0
14:1
4 9.
8
13:4
8 6.6
Tur
bid
it
y(N
TU)
3.5
3.0
3.7
2.0
6.3 3.0
Tra
ns
par
en
cy(S
eccb
idis
k)
(m)
0.9 .8 .5 1.5 .7 .4
Car
- B
lear
- A
lka-
bona
te
bona
te
Unit
y(m
g/L
(m
g/L
as
(mg/
L a
sas
C0
3)
HC03
) C
aC03
)
Slt
e-5
210
220
270
240
174
26
206
213
Nit
rite
plu
snit
rate
(mg/
Las
N
)
<0.
10
< .1
0
< .1
0
< .1
0
< .1
0
< .1
0
Am
mon
ia(m
g/L
as
N)
<0.0
1
.07
< .0
1
.15
.04
.04
Am
mon
iaplu
so
rgan
ic(m
g/L
as
N)
1.1 .7 .9 1.9 .6 1.0
Pho
spho
rus
Tota
l(m
g/L
as
P)
0.1
8
.13
.27
.21
.06
.37
Dis
so
lved
ort
ho
(mg/
Las
P)
0.11 .0
3
.15
.10
< .0
1
.06
Chl
oro
phyll
a(p
g/L
3
8.20
35.0
83.0
5.70
74.0
690
Chl
oro
ph
yll
b(p
g/L
)
<0.
10
< .1
0
< .1
0
< .1
0
1.50
6.40
Table 3. Quality of runoff fro* fields to Orwell Keaervoir at site 5
[Sample taken April 18, 1985 at 12:45 p.m.]
Specific conductance(microsiemens per centimeter at 25° Celsius) 1,100
pH (standard units) 8.4
Temperature (degrees Celsius) 15.0
Oxygen, dissolved (milligrams per liter) 11.2
Oxygen, dissolved (percent saturation) 114
Turbidity (nephelometric turbidity unit?) 6.0
Alkalinity (milligrams per liter as CaCOo) 200
Nitrite plus nitrate nitrogen, dissolved(milligrams per liter as N) < .01
Ammonia nitrogen, dissolved(milligrams per liter as N) <.01
Ammonia plus organic nitrogen, dissolved(milligrams per liter as N) .9
Phosphorus, dissolved (milligrams per liter as P) .09
Phosphorus, ortho, dissolved(milligrams per liter as P) .01
21
Table 4. Phytoplankton data for Orwell Reservoir
[4, dominant organism; mL, milliliter; , not found; <, less than]
Date:
Time:
Total Cells per mL:
April 18, 1985
1515
2800
May 15, 1985
1540
2600
June 18, 1985
1700
1300
July 24, 1985
1620
1400
August 29, 1985
1530
1400
Organism Cells Per- per mL cent
Cells Per- Cells Per- Cells Per- Cells Per- per mL cent per mL cent per mL cent per mL cent
Site_l
BAC1LLARIOPHXTA (DIATOMS).BACILLARIOPHXCEAE..ACHNANTHALES...ACHNANTHACEAE....ACHNANTHES..... A.CLEVE1..... A.EXIGUA..... A.LANCEOLATA.....A.MINUTISSIMA.... COCCONEIS.....C.PEDICULUS.....C.PLACENTULA..BACILLARIALES...NITZSCHIACEAE....NI1ZSCH1A.....N.AC1CULARIS.....N.AMPHIBIA.....N.DISSIPATA.....N.FONTICOLA.....N.FRUSTULUM.....N.PALEA..EPITHEMIALES...EPITHEMIACEAE....EPITHEMIA.....E. SOREX..EUPOD1SGALES...COSCINODISCACEAE....CYCLOTELLA.....C.KUTZIMGIANA..... C. MENEGHINIANA.....C.OCELLATA.....C.PSEUDOSTELLIGERA....MELOSIRA.....M.AMBIGUA.....M.GRANULATA.....M. VARIANS....STEPHANODISCUS.....S.ASTREA V.MINUTULA.....S.HANTZSCHII..FRAGILARIALES...FRAGILARIACEAE....ASTERIONELLA..... A.FORMOSA.... DIATOMA.....D.TENUE V. ELONGATUM.....D.VULGARE....FRAGILARIA.....F.CAPUCINA.....F.CAPUCINA V.MESOLEPTA......F.CONSTRUEMS..... F. CONSTRUENS V.VENTER.....F.CROTONENSIS.....F.PINNATA.....F.VAUCHERIAE....SYNEDRA.....S.PARASITICA.....S.RADIANS..... S.RUMPENS.....S.ULNA..NAVICULALES...CYMBELLACEAE.... AMPHORA..... A.OVALIS..... A.PERPUSILLA....CYMBELLA.....C.MINUTA..... C.TUMIDA... GOMPHONEMACEAE....GOMPHONEMA.....G.ANGUSTATUM.....G.OLIVACEUM..... G.SUBCLAVATUM
27 153 2
27 1
27 1
80 327 1
27 127 1
110 4
27 1
27 1
27 1
& 770 29
53 2
27 127 1
130 5
26 1
26 1150 6
51 226 1
150 626 126 177 3
51 2
51 226 1
515151
26 1& 210 8
26 1
51 2150 6
26 1
51 2
26 1
51 2
26 1
26 1130 526 1
12 <1
23 2
12
12
12
70 535 3
12 <1 23 2
82 6
23 2
23 2
12 <1
35 3
23 2
23 2
12 <1 23 2
11 <1 45 3
11
11
23 2
120 9
120 9
34 2
11
23 2
23 2
23 2 11 <1
28 2
14 156 4
14 156 4
14 1
42 356 4
84 6
56 428 2
84 614 1
14 1
28 214 1
42 3
14 1
14 1
42 3
14 1
56 414 1
22
Table 4. Phytoplankton data for Orwell Reserroir Continued
Date:
Time :
Total Cells per mL:
Organism
BACILLARIOPHYTA (DIATOMS). BACILLARIOPHYCEAE..NAVICULALES. . . NAVICULACEAE....NAVICULA.....N.ANGILICA (5) RALFS. . . . . N. CAPITATA (5) EHR.-1..... N. CRYPTOCEPHALA... ..N. CRYPTOCEPHALA V.VENETA. . . . . H. DECUSSIS (5) OSTR.....N.GREGARIA..... N. LANCEOLATA, , . , , N.MENISCULUS V.UPSALIEN...... N. MINIMA. .. . .N.MIHUSCULA. . . . . N. TRIPUNCTATA (5) (D.CHLOROPHYTA (GREEN ALGAE). CHLOROPHYCEAE. . CHLOROCOCCALES. . . HYDRODICTYACEAE.... PEDIASTRUM. . . OOCYSTACEAE.... ANKISTRODESMUS.... OOCYSTIS....SELENASTRUM.... TETRAEDRON. . . SCENEDESMACEAE.... CRUCIGENIA....SCENEDESMUS. . TETRASPORALES. . . PALMELLACEAE.... SPHAEROCYSTISCHRYSOPHYTA (YELLOW-GREEN ALGAE).BACILLARIOPHYCEAE..CENTRALES. . . COSCINODISCACEAE.... CYCLOTELLA. . PENNALES...ACHNANTHACEAE.... RHOICOSPHENIA.....R. CURVATA...FRAGILARIACEAE.... SYNEDRA...GOMPHONEMATACEAE.... GOMPHONEMA...NAVICULACEAE.... CALONEIS....NAVICULA. . . NITZSCHIACEAE.... NITZSCHIA. CHRYSOPHYCEAE..CHROMULINALES. . . CHROMULINACEAE.... CHRYSOCOCCUS....KEPHYRION...OCHROMONADACEAE.... OCHROMONASCYANOPHYTA (BLUE-GREEN ALGAE). CYANOPHYCEAE. . OSCILLATORIALES. . . NOSTOCACEAE.... ANABAENAEUGLENOPHYTA (EUGLENOIDS). CRYPTOPHYCEAE..CRYPTOMONIDALES. . . CRYPTOCHRYSIDACEAE.... CHROOMOHAS.... RHODOMONAS. . . CRYPTOMONODACEAE.... CRYPTOMONAS. EUGLENOPHYCEAE. . EUGLENALES. . . EUGLENACEAE.... TRACHELOMONASPYRRHOPHYTA (FIRE ALGAE)
April 18, May 15, June 18, July 24, August 29,1985 1985 1985 1985 1985
1515 1540 1700 1620 1530
2800 2600 1300 1400 1400
Ceils Per- Cells Per- Cells Per- Cells Per- Cells Per-per fflL cent per mL cent per uL cent per mL cent per nL cent
Site_ 1 -- Con t j.nued
12 <1 -- 14 127 1 -- 23 2 11 <1
& 210 8 23 2 34 2 42 327 1 150 6 47 4 ~ 42 3
26 1 ~ 23 2 28 212 <1
27 1 26 151 2
23 2 -- 70 512 <1
51 2
m 112 <1 79 6 28 2
11 <114 1
26 1 12 <1 11 <1
23 2 11 <135 3 45 3
12 <1 11 <1
5! 2
100 4 35 3 11 <1 28 2
11 o
12 <1 14 1
11 <127 1 47 4 11 <1 14 1
52 2 35 3 -- 2« 2
160 6 -- 2b 2720 27 -- 23 2
~ ~ 12 <1
79 6
53 2 -- -- 79 6 98 7130 5 77 3 « 390 30 190 14 & 110 «
150 6 23 2 & 240 17 i>6 4
53 2
23
Table 4. Phytoplankton data for Orwell Reservoirs-Continued
Date:
Time:
Total Cells per mL:
September 24, 1985
1635
2800
February 26, 1986
1400
400
May 01, 1986
1344
2500
July 22, 1986
1306
6700
Organism Cells Per- Cells Per- Cells Per- per mL cent per mL cent per mL cent
Cells Per- per mL cent
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHYCEAE..ACHNANTHALKS...ACHNANTHACEAE....ACHNANTUKS..... A. CLEVEI.....A.EXIGUA..... A.LANCEOLATA.....A.MIMJTISSIMA....COCCONE1S.....C.PED1CULUS.....C.PLACENTULA..BAC1LLAR1ALES...NITZSCHIACEAE....N1TZSCH1A.....N.AC1CULAR1S.....N. AMPHIBIA.....N.CAPITELLATA.....N.DISSIPATA.....N.MICROCEPHALA.....N.PALEA.....N.SIGMOIDEA..EUPOD1SCALES...COSCINOD1SCACEAE....CYCLOTELLA.....C.KUTZING1ANA.....C.MENEGHINIANA.....C.PSEUDOSTELLIGERA.....C.STELLIGERA....MELOSIRA.....M.GRANULATA.....M.VARIANS....STEPHANODISCUS.....S.ASTREA V.M1NUTULA.....S.HANTZSCHII..FRAG1LARIALES...FRAGILAR1ACEAE....DIATOMA.....U.TENUE V. ELONGATUM.....D.VULGARE....FRAG1LARIA.....F.BREUISTRIATA.....F.CONSTRUENS.....F.CONSTHUENS V.VENTER.....F.PINNATA.....F.VAUCHERIAE....SYNEDRA.....S.RADIANS.....S.ULNA..NAVICULALES...CYMBELLACEAE.... AMPHORA..... A.OVALIS.....A.PERPUSILLA....CYMBELLA.....C.AFFINIS.....C.M1NUTA...GOMPHONEMACEAE....GOMPHONEMA.....G.ANGUSTATUM..... G. OLIVACEUM...NAVICULACEAE....NAVICULA.....N.CAPITATA.....N.CRYPTOCEPHALA..... N.CRYPTOCEPHALA V.VENETA.....N.GRACILOIDES.....N.GREGARIA.....N.MEN1SCULUS V.UPSALIEN......N.MINIMA..... N.RADIOSA.....N.RHYNCHOCEPHALA.....N.SEMINULUM.....N.TRIPUNCTATA
25
51 2
51 2
100 4510 19
25 <1 51 2
150 651 2
25 <1 25 <1
25 <1
76 3
25
25
252525
25
25
10 35 15 1
10 3
5 129 7
5 115 4
5 110 3
5 1
5 1
5 110 3
5 124 6
5 15 15 15 1
15 4
5 1
10 3
15 4
10 3 & 44 11
29 75 1
10 35 1
5 15 1
27 1
55 2
4 330 13
55 227 1
27 1
27 1
110 4270 11
55 227 1
27 155 227 1
220 927 1
27 127 1
110 4
27 1
160 6
27 127 1
27 1
190 3
140 2
48 <148 <1
& 1,900 29
48 <1
1,100 17
48
95 1
48
Table 4. Pbytoplankton data for Orwell Reservoir Continued
Date: September 24, February 26, May 01, July 22,1985 1986 1986 1986
Time: 1635 1400 1344 1306
Total Cells per mL: 2800 MOO 2500 6700
Organism Cells Per- Cells Per- Cells Per- Cells Per-per mL cent per mL cent per mL cent per mL cent
ChLOROPHYTA (GREEN ALGAE). CHLOROPHXCEAE. . CHLOROCOCCALES. . . OOCXSTACEAE. . . . ANKISTRODESMUS 25 <1 82 3 110 2. . . . CLOSTERIOPSIS 48 <1....SELENASTRUM 27 1 48 <1...SCENEDESMACEAE. . . . CRUCIGEN1A 27 1 95 1. . . . SCENEDESMUS 27 1 190 3. . . . TETRASTRUM 48 <1..VOLVOCALES. . . CHLAHXDOMONADACEAE. . . . CHLAMYW)MONAS 240 4CHRYSOPHYTA (YELLOW-GREEN ALGAE). BACILLARIOPHICEAE. . CENTRALES. . . COSCINODISCACEAE. . . . CYCLOTELLA ~ 27 1....MELOSIRA ~ 51 ..PENNALES 10 3. . . ACHNANTHACEAE.... RHOICOSPHENIA. . . . . R. CURVATA 51 55 2 «...FRAGILARIACEAE. ...SYNEDRA 55 2...NAVICULACEAE. ...NAVICULA 25 <1 15 4 48 <1....P1NNULARIA ~ 27 1. . . NITZSCHIACEAE. . . . NITZSCH1A 25 <1 20 5 54 2 140 2.CHRXSOPHXCEAE. . CHROMULINALES. . . CHROMULINACEAE....CHRYSOCOCCUS 51 55 2....KEPHYRION. 100 4 27 1 CYANOPHYTA (BLUE-GREEN ALGAE). CXANOPHXCEAE. . OSC1LLATORIALES. . . NOSTOCACEAE....ANABAENA 95 1. . . OSCILLATORIACEAE. . . . OSCILLATORIA 27 1EUGLENOPHYTA (KUGLENOIDS). CRYPTOPHYCEAE. . CRYPTOHONIDALES. . . CRXPTOCURYSIDACEAE. . . . CHROOMONAS 25 <1 48 <1. . . . RHODOMONAS & 1,100 41 82 3 1,000 15. . . CRYPTOHONODACEAE. . . . CRYPTOHONAS 76 3 27 1 620 9. EUGLENOPHYCEAE. . EUGLEMALES. . . EUGLENACEAE....PHACUS -- 95 1. . . . TRACHELOMOJJAS 55 2 48 <1PYRRHOPHYTA (FIRE ALGAE). DINOPHYCEAE..DINOKONTAE. . . CERATIACEAE. . . . CERATIUM 25 <1
Table 4. Phytopiankton data for Orvell Reaerroin Continued
Date:
Time:
Total Cells per mL:
June 18, 1985
1630
1400
July 24, 1985
1515
1400
August 29, 1985
1500
2000
Organism Cells Per- per mL cent
Cells Per- per mL cent
Cells Per- per mL cent
Site 2
BACILLARIOPHXTA (DIATOMS).BACILLARIOPHXCEAE..ACHNANTHALES...ACHNANTHACEAE....ACHNANTHES... . . A. CLEVEI..... A.EXIUUA..... A.HUNGARICA.....A.LANCEOLATA.....A.LINEARIS.....A.MINUTISSIMA....COCCONEIS.....C.PEDICULUS.....C.PLACENTULA..BACILLARIALES...N1TZSCH1ACEAE....NITZSCHIA.....N.ACICULARIS.....N.AMPHIBIA.....N.COMMUNIS.....N.DISSIPATA.....N.FRUSTULUM.....N.LINEARIS.....N.PALEA.....N.TRYBLIONELLA..EPITHEMIALES...EPITHEMIACEAE....EPITHEMIA.....E.SOREX..EUPODISCALES...COSCINODISCACEAE....CXCLOTELLA.....C.KUTZ1NGIANA.....C.MENEGHINIANA.....C.PSEUDOSTELLIGERA....MELOSIRA.....M. AMBIGUA.....M.GRANULATA....STEPHAJiODISCUS..... S. ASTREA V.MINUTULA.....S.HANTZSCHII..FRAGILARIALES...FRAGILARIACEAE....ASTERIONELLA..... A.FORMOSA....FRAGILAR1A.....F.CAPUCINA.....F.CONSTRUENS.....F.CROTONENS1S.....F.PINNATA.....F.VAUCUERIAE....SYNEDRA.....S.PARASITICA.....S.RADIANS..... S. RUMPEUS.....S.ULNA..NAVICULALES...CXMBELLACEAE.... AMPHORA..... A.OVALIS..... A. PERPUSILLA....CXMBELLA.....C.AFFINIS.....C.MINUTA... GOMPUONEMACEAE....GOMPUONEMA..... G.ANGUSTATUM.....G.OLIVACEUM.....G.PARVULUM
24 2 12 <1 12 <1
12
66 6
12 <1
12 <1 24 2 24 2 12 <1
49 3
37 349 3
1237
37 312 <137 312 <1
24 2
1273
49
12
12
37 3
12121212
12
160 11
150 11
62 4
37 3
37 349 3
12
12 <1 61 4
37 3
25 2
12 <1
1919
19 <1 130 7
56 3
56 3
19 <1
19 <1130 7150 8
37 237 2
19 <1
19
56 3
19 <1 37 2
19 <1
37 2
4 170 9
19
Tabla 4. Pbytoplanktoa data for Onfall Beaerrolr Continued
Date: June 18, July 24, August 29,1985 1985 1985
Tine: 1630 1545 1500
Total Cells per mL: 1400 1400 2000
Organism Cells Per- Cells Per- Cells Per-per mL cent per mL cent per mL cent
Site 2 -- CooUaued
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHXCEAE.. NAVICULALES... NAVICULACEAE....NAVICULA.....N.ANGILICA (5) RALFS 12 <1..... N.CAPITATA (5) EHR.-1 24 2 12 <1.....N.CRYPTOCEFHALA 73 5 56 3. ....N.CRmOCEPHALA V.VENETA 37 3.....N.DECUSSIS (5) OSTR 12 <1 12 <1..... N. GRHJAHIA 12 <1..... N. MINIMA 37 3 25 2 37 2.....N.MOURNEI 19 <1..... N. PUPULA 19 <1.....N.TRIPUNCTATA (5) (D. 37 3....NEIDIUM.....N.AFFINE 12 <1CHLOROPHXTA (GREEN ALGAE).CHLOROPHXCEAE..CHLOROCOCCALES...OOcrsTACEAE....ANKISTRODESMUS 74 5 37 2....OOCYSTIS 12 <1 25 2...SCENEDESMACEAE....CRUCIGENIA 12 <1 74 4....SCENEDESMUS 24 2 12 <1 37 2..TETRASPORALES... PALMELLACEAE....SPHAEROCYSTIS 12 <1.. VOLVOCALES...CULAMXDOMONADACEAE....CHLAMYDOMONAS 12 <1 19 <1..ZYGNEhATALES... DESMIDIACEAE....STAURASTRUM 12 <1CHRXSOPHXTA (YELLOW-GREEN ALGAE).BACILLARIOPHYCEAE..CENTRALES...COSCINODISCACEAE....CYCLOTELLA 12 <1.. PENNALES... ACHNAMTHACEAE....RHOICOSPHENIA..... R. CURVATA 24 2 12 <1 37 2.,.C1MBELLACEAE....CYMBELLA 12 <1... FRAGILARI1CEAE....SXNEDRA 38 2...GOMPHONEMATACEAE....GOMPHONEMA 12 <1 ~ 37 2...NAVICULACEAE....NAVICULA 12 <1 37 2...NIT2SCH1ACEAE.... NITZSCHIA 12 <1 12 <1 37 2.CHRISOPHICEAE..CHROMULIKALES...CHROMULIKACEAE....CHRYSOCOCCUS ~ 19 <1....KEPHYRION 37 3... OCHROMONADACEAE.... OCHROMONAS 12 <1CXANOPH1TA (BLUE-GREEN ALGAE).CXANOPHICEAE..OSCILLATORIALES...NOSTOCACEAE....ANABAENA 19 <1EUGLENOPHXTA (EUGLENOIDS).CRXPTOPH1CEAE..CRIPTOMQNIDALES...CRXPTOCHRXSIDACEAE....CHROOMONAS 86 6 130 7.... RHODOMONAS & 230 16 160 11 130 7... CRXPTOMONODACEAE....CRYPTOMONAS & 200 14 110 6
Table 4. Ptqrtoplankton data for Orwell Reaerroir Continued
Date: September 24, May 01, July 22,1985 1966 1986
Time: 1630 1515 1500
Total Cells per mL: 1400 1400 2000
Organism Cells Per- Cells Per- Cells Per-per mL cent per mL cent per nL cent
Si t e_2_ rr£pnjtinuea
BACILLARIOPHYTA (D1ATOHS).BACILLARIOPHYCEAE..ACHNANTHALES...ACHNANTHACEAE....ACHNANTHES.....A.CLEVEI -- 16 1 22 <1.....A. LANCEOLATA 57 4 16 1 22 <1.....A.MINUTISSIMA 64 4....COCCONEIS... .. C. PEDICULUS 16 1..... C. PLACEHTULA 57 4 32 2 66 3..BACILLARIALES...NITZSCHIACEAE....NITZSCHIA.....N.ACICULARIS 14 <1 180 11 66 3.....N.AMPHIBIA -- 22 <1.....N.DISSIPATA 32 2 22 < 1..... N. FONTICOLA 16 1..... N. FRUSTOLOM 14 <1 16 1 22 <1.....N.LINEARIS 16 1 22 <1.....N. PALEA 22 <1..EUNOTIALES...EUNOTIACEAE....EUNOTIA..... E. LLEGANS 22 < 1..EUPODISCALES...COSCINODISCACEAE....CYCLOTELLA.....C.KUTZINGIANA 16 1,....C.MENEGHINIANA 32 2 22 <1..... C. PSEUDOSTELLIGERA 260 17 200 9....MELOSIRA.....M.AHBIGUA 43 3.....M.GRANULATA 14 <1 44 2.....M. GRANULATA V.AUGUSTISS. 16 1....STEPHANODISCUS.....S.ASTREA V.MINUTULA 00 5 22 <1.....S.HANTZSCHII 80 5..FRAGILARIALES... FRAGILARIACEAE....ASTERIONELLA.....A.FORMOSA -- 32 2....DIATOM!..... D. VULOARE 32 2.... FRAGILARIA.....F.CONSTRUENS 14 <1..... F. CONSTRUENS V. VENTER 29 2 22 <1.....F.PINNATA 14 <1 22 <1....SYNEDRA.....S. RADIANS -- t 210 13.....S. ULNA 14 <1 80 5..NAVICULALES...CYMBELLACEAE.... AMPHORA.....A. COEFFEIFORMIS 14 <1..... A. OVALIS ~ 22 <1.....A. PERPUSILLA 14 <1 64 4....CYMBELLA..... C. TUMIDA 14 <1...GOMPHONEMACEAE....GOMPHONEMA..... G. ANGOSTATUM 16 1 44 2.....G.OLIVACEUH 14 <1 64 4.....G.TENELLUH -- -- 22 <1
28
Table 4. Pbytoplankton data for Orwell Reservoir Continued
Date:
Time :
Total Cells per mL:
September 24, 1985
1630
1400
May 01, 1986
1545
1400
July 22, 1986
1500
2000
Organism Cells Per- Cells Per- per mL cent per mL cent
Cells Per- per mL cent
Site 2 Continued
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHYCEAE. .NAVICULALES... NAVICULACEAE....NAVICULA..... N. CRYPTOCEPHALA..... N. CRYPTOCEPHALA V. VENETA.....N.DECUSS1S (5) OSTR.....N.GREGARIA.....N. MINIMA.....N.RHYNCHOCEPHALA.....N.TRIPUNCTATA (5) (0.CHLOROPHYTA (GREEN ALGAE).CHLOROPHYCEAE..CHLOROCOCCALES...HYDRODICTYACEAE....PEDIASTRUM...OOCYSTACEAE....ANKISTRODESMUS....OOCYSTIS....SELENASTRUM....TETRAEDRON...SCENEDESMACEAE....CRUCIQENIA....SCENEDESMUS..VOLVOCALES...CHLAMYDOMONADACEAE....CHLAMYDOHONAS..ZYGNEMATALES...DESMIDIACEAE....COSMARIUMCHRYSOPHYTA (YELLOW-GREEN ALGAE).BACILLARIOPHYCEAE.. CENTRALES...COSCINODISCACEAE....CYCLOTELLA.. PENNALES...ACHNANTUACEAE. ...RHOICOSPHENIA.....R.CURVATA...FRAGILARIACEAE....SYNEDRA...GOMPHONEMATACEAE....GOHPHONEMA...NAVICULACEAE....NAVICULA...NITZSCHIACEAB....NITZSCHIA.CHRYSOPHYCEAE..CHROMULINALES...CHROMULINACEAE.... OIRYSOCOCCUS....KEPHYRIONCYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE..CHROOCOCCALES...CHROOCOCCACEAECYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE..OSCILLATORIALES... NOSTOCACEAE....ANABAENAEUGLENOPHYTA (EUGLENOIDS).CRYPTOPHYCEAE..CRYPTOMONIDALES...CRYPTOCHRYSIDACEIE....CHROOHONAS....RHODOMONAS...CRYPTOMONODACEAE....CRYPTOMONAS.EUGLENOPHYCEAB.. BUG LEN ALES...EOGLENACEAE....TRACHELOHONAS
29 2 14 <1 29 2 14 <1
14
71 5 14 <1 29 2
43 3 14 <1
14
29 2
26 2
43 3
42 3
14 <1
ft 330 22
100 7
96 6
16 116 116 1
16 1
32 2
16 1
16 1
16 1
16 1
32 2
32 248 3
96 6
32 2
2222
22
22 <1
88 4
66 3 22 <1
22 <1 66 3
66 3
22
22
160 7420 18
490 21
22
29
Table 4. Ptqrtoplankton data for Orwell Beaerrolr--Continued
Date:
Time:
Total Cells per mL:
April 18, 1985
1115
3600
May 15, 1985
1610
2900
June 18, 1985
1730
2700
July 21, 1985
1710
2000
August 29, 1985
1640
2600
Organism Cells Per- Cells Per- Cells Per- Cells Per- Cells Per- per mL cent per mL cent per mL cent per mL cent per mL cent
BAC1LLAR10PHYTA (DIATOMS).BACILLARIOPHYCEAE..ACHNANTHALES...ACHNANTHACEAE.... ACHNANTHES.....A.CLEVEI..... A. EX1GUA..... A. LANCEOLATA..... A.M1NUT1SSIMA....COCCONEIS.....C.PEDICULUS.....C.PLACENTULA..BACILLAR1ALES...NITZSCHIACEAEv .. N1TZSCHIA.....N.ACICULARIS.....N.AMPHIBIA.....N.D1SS1PATA.....N.FRUSTULUM.....N. PALEA..EUPODISCALB5...COSCINODISCACEAE....CYCLOTELLA.....C.KUTZ INDIANA..... C. MENEGH1NIANA.....C.PSEUDOSTELLIGERA....MELOSIRA.....M.AMB1GUA.....M.GRANULATA....STEPHANODISCUS.....S.ASTREA V. MINUTULA.....S.HANTZSCHII.....S.SUBSALSUS..FRAGILAR1ALES...FRAG1LARIACEAE....D1ATOMA.....D.VULGARE....FRAGILAR1A.....F.BREUISTR1ATA.....F.CAPUCINA.....F.CONSTRUEMS.....F.CONSTRUEMS V.VENTER.....F.PINNATA.....F.VAUCHER1AE....SYNEDHA.....S.DELICATISSIMA.....S.PARAS1TICA.....S.RADIANS..... S.ULNA..NAV1CULALES...CYMBELLACEAE.... AMPHORA..... A. OVALLS..... A.PERPUS1LLA....CYMBELLA.....C.AFF1NIS.....C.S1NUATA...GOMPHONEMACEAE....GOMPHONEMA.....G.ANGUSTATUM.....G.OLIVACEUH...NAVICULACEAE....NAVICULA.....N.CAP1TATA.....N.CRYPTOCEPUALA.....N.CRYPTOCEPUALA V. VENETA.....N.DECUSSIS.....N.GREGARIA.....N.LANCEOLATA.....N.MENISCULUS V.UPSALIEN.
29
2929
2929
29
86 2130 12
57 2
29 <1
29 <1
& 770 21 29 <1
29 <1140 4
110 3
2929
29
2929
29 <1 87 3
29 <1
120 429 <158 2
29 <1180 629 <1
290 8 200 7230 6 180 6
29 <1 350 12
29
29 <1
58 258 2
58 2 29 <1
58 2
29 <1
29 <1 87 3
120 4120 4
23
140
23
370 1469 392 3
140 5120 4
23 <1 * 410 15
23 <1
69 3 23 <1
23
23
23 <1 46 2
232323
23
16
16
130 733 2
280 14
49 299 5
33 2 16 <1
16 <1 33 2
16
16
1616
16
21
21
21
21
86 3130 5
43 2
21
21
21
43 2
43 2
43 221 <1
30
Table 4. Pnytoplankton data for Orwell Beaerrolr Continued
Date: April 18, May 15, June 18, July 24, August 29,1985 1985 1985 1985 1985
Time: 1445 1610 1730 1740 1640
Total Cells per mL: 3600 2900 2700 2000 2600
Organlw Cells Per- Cells Per- Cells Per- Cells Per- Cells Per-per BL cent per mL cent per mL cent per mL cent per mL cent
Site 3 Continued
BACILLARIOPHITA (DIATOMS). BACILLARIOPHXCEAE.. NAVI CULALES...NAVICULACEAE....NAVICULA.....N.MINIMA -- 29 <1..... M. PUPULA -- 16 <1 ..... N. RHXNCHOCEPHALA 58 2.....N.SBMINULUM 29 <1..... N. TRIPUNCTATA (5) (D. 29 <1 46 2CHLOHOPHITA (GREEN ALGAE).CHLOROPHICEAE.. CHLOHOCOCCALES... HYDHODICmCEAB.... PEDIASTRUM 23 <1...OOCXSTACEAE.... ANK1STRODESMUS -- 29 <1 120 4 130 7 43 2....CHODATELLA 23 <1.... SELEMASTRUM 16 <1...SCEHEDESMACEAE.... ACTINASTRUM 23 <1 .... CRUCIGEMIA 21 <1.... SCENEDESMOS 29 <1 92 3 81 4 63 3.. TETRASPOHALES...PALMELLACEAE.... GLOEOCXSTIS 29 <1 ..VOLVOCALES...CHLAMXDOMOMADACEAE.... CHLAMXDOMONAS 29 <1 16 <1 CHRXSOPHXTA (XELLOH-GREEM ALGAE).BACILLARIOPHXCBAB.. CENTRALES... COSCINODISCACEAE....CYCLOTELLA 57 2 120 4..PENNALES 29 <1 ...ACUNANTHACEAE.... RHOICCSPHEHIA.....R.CURVATA 29 <1 58 2 46 2 16 <1 43 2...NAVICULACEAE....NAVICULA 29 <1 29 <1 23 <1 16 <1 ...MITZSCHIACEAE....HITZSCHIA 58 2 69 3 21 <1.CHRYSOPHYCEAE..CHROMULDIALKS... CHROMULIHACBAE.... CHRXSOCOCCUS 170 5 29 <1 ~....KEPHXRION 710 19 29 <1 23 <1 33 2 21 <1... OCHROMONADACEAE.... OCHHOMONAS 16 <1CXANOPHXTA (BLUE-GREEN ALGAE).CXANOPHXCEAE.. OSCILLATORIALBS...MOSTOCACBAE....ANABAENA * 380 19 ...OSCILLATOHIACEAE.... OSCILLATOHIA 21 <1EUGLENOPHYTA (EUGLEMOIDS).CRXPTOPHXCEAB.. CRXPTOMONIDALES...CHYPTOCHRYSIDACEAB.... CHROOMOMAS 87 3 130 7 220 9.... RHODOMONAS 110 3 150 5 370 14 130 7 * 1,100 44...CRYPTOHOHODACBAE.... C8YPTOMOHAS 29 <1 69 3 66 3 260 10. EUGLEHOPHYCEAE.. EUQLENALES...EUOLWACBAE....EDGLEMA 16 <1 21 <1.... TRACHELOMOHAS 29 <1 49 2 43 2PYRRHOPHITA (FIRE ALGAE). DUOPHXCEAE..DINOKONTAE...CERATIACBAE....CERATIUM 33 2 110 4... PERIDUIACEAE.... PER1DIHIUM 16 <1
31
Table 4. Pbytoplankton data for Orwell Reservoir Continued
Date:
Time :
Total Cells per mL:
September 24, 1985
1730
4100
February 26, 1986
1500
230
May 01, 1986
1602
1700
July 22, 1986
1436
9300
Organism Cells Per- per mL cent
Cells Per- per mL cent
Cells Per- per mL cent
Cells Per- per mL cent
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHXCEAE..ACHNANTHALES...ACUNANTUACEAE....ACHNANTHES..... A.CLEVEI.....A.HUNGAHICA..... A.LANCEOLATA..... A.MINUTISS1MA....COCCONEIS.....C.D1SCUIUS.....C.PEDICULUS.....C.PLACENTULA..BACILLAHIALES... NITZSCHIACEAE....N1TZSCHIA.....N.ACICULAR1S.....N. DISSIPATA.....N.FRUSTULUM.....N.LINEARIS.....N.PALEA..EP1THEMIALES...EPITHEMIACEAE....EPITHEMIA.....E.H1NDMANII.....E.SOHEX..EUPODISCALES...CQSCINODISCACEAE....CXCLOTELLA.....C.KUTZINGIANA..... C. MENEGHINIANA.....C.PSEUDOSTELL1GERA....MELOSIAA.....M. AMBIGUA.....M.GRANULATA.....M.VARIANS....STEPHANODISCUS.....S.ASTHEA V.MINUTULA.....S.HAMTZSCHII..FRAGILARIALES...FRAGILARIACEAB....DIATOMA.....D.TENUE V. EtONGATUM.....D.VULGARE.... FRAGILARIA.....F.COMSTRUEMS.....F.CQNSTRUEMS V.TENTER.....F.PIMNATA.....F.VAUCHERIAE....SYNEDRA.....S.PARASITICA.....S.RADIANS.....S.RUHPBNS.....S.ULNA..NAVICULALES...C1MBELLACCAE.... AMPHORA..... A.PERPUSILLA....CXMBELLA.....C.MINUTA...GOHPHONEMACEAE....GOHPHOMEMA.....G.OLIVACEUM.....G.TENELLUM
38
38 <1
38 <1 77 2
77 21,200 29
120 338 <1
310 8270 7
38
3 1
5 216 6
3 13 1
13 5
3 116 63 13 15 2
5 2
3 1
3 1
3 18 3
5 23 13 13 1
3 13 15 28 3
13 5
3 1
27 113 1
14
14
1414
120 7
14
14
120 7 27 2 14 <1
300 18570 34
14 <1
14 <1
14 0
41 2
27 2
27 2
27 2
71
71
140 2
2,400 26
1,100 12
71
71
32
Table 4. Phjrtoplankton data for Orwell Reservoir Continued
Date: September 24, February 26, May 01, July 22,1985 1986 1966 1906
Time: 1730 1500 1602 1436
Total Cells per mL: 4100 230 1700 9300
Organism Cells Per- Cells Per- Cells Per- Cells Per-per mL cent per mL cent per mL cent per mL cent
Site 3-- Continued
BAC1LLARIOPHITA (DIATOMS).BACILLARIOPHICEAE..NAVICULALES...NAV1CULACEAE....NAVICULA.....N.COCCONEIFORHIS 31 .....N.CRYPTOCEPHALA 77 2 52.....N.CRIPTOCEPHALA V.VENETA 19 8 14 <1 71 <1.....N.DECUSSIS (5) OSTR -- -- 14 <1.....N.RHYNCHOCEPHALA ~ 31--..... N.TRIPUNCTATA ~ 31 CHLOROPHITA (GREEN ALGAE).CHLOROPHYCEAE..CHLOROCOCCALES...OOCYSTACEAE.... ANKISTRODESMUS 150 4 41 2 140 2. ...SBLENASTRUM -- 71 <1...SCENEDESMACEAE....SCENEDESMUS 38 <1 27 2 71 <1..TETRASPORALES...PALMELLACEAE....SPHAEROCYSTIS 71 <1..VOLVOCALES...CHLAMYDOMONADACEAE.... CHLAMYDOMONAS 430 5CHRYSOPHYTA (YELLOW-GREEN ALGAE).BACILLARIOPHYCEAE.. CENTRALES...COSCINODISCACEAE....CYCLOTELLA -- -- 27 2..PENNALES -- 31"...ACHNANTHACEAE....RHOICOSPHENIA.....R.CURVATA ~ 31 55 3...NAVICULACEAE....NAVICULA 76 2 63...NITZSCHIACEAE....NITZSCHIA 83 .CHRYSOPHYCEAE..CUROMULINALES...CHROMULINACEAB....CHRYSOCOCCUS 68 4....KEPHYRION 52 CYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE..OSCILLATORIALES...NOSTOCACEAE....ANABAENA 140 2....APHANIZOMENON 31 EUGLENOPHYTA (EUGLEHOIDS).CRYPTOPHYCEAE..CRYPTOMONIDALES... CRYPTOCHRYSIDACEAE....RHODOMONAS 4 1,300 32 14 <1 4 3,000 32... CRYPTOMOMODACEAE.... CRYPTOMONAS 190 5 1,400 15.EUGLENOPHYCEAE.. EUGLENALES... EUGLENACEAB.... THACHELOMONAS 55 3PYRRHOPHYTA (FIRE ALGAE).DINOPHYCEAE..DINOKONTAE...PERIDINIACEAE....PERIDINIUM 3» <1
33
Table 4. Pbytoplankton data for Orwell ReaerToir Continued
Date:
Time:
Total Cells/mL:
April 18, 1985
1400
3400
May 15,1985
1635
3400
June 18, 1985
1800
3000
July 24, ' A' 1985
1815
3200
Organism Cells Per- Cells Per- Cells Per- Cells Per- Cells P per mL cent per mL cent per mL cent per mL cent per mL c<
Site 4
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHYCEAE..ACHNANTHALES...ACHNANTHACEAE....ACHNANTHES..... A.LANCEOLATA.....A.LINEARIS.....A.MINUTISSIMA.... COCCONEIS.....C.PEDICULUS.....C.PLACENTULA..BACILLARIALES...NITZSCHIACEAE....NITZSCHIA.....N.ACICULARIS.....N.AMPHIBIA.....N.COMMUNIS.....N.DISS1PATA.....N.FRUSTULUM.....N.LINEARIS.....N.PALEA..EUPODISCALES...COSCINODISCACEAE....CYCLOTELLA.....C.GLOMERATA.....C.KUTZINGIANA.....C.MENEGHINIANA.....C.OCELLATA.....C.PSEUDOSTELLIGERA....MELOSIRA.....M.AMBIGUA.....M.GRANULATA.....M.VARIANS....STEPHANODISCUS.....S.ASTHEA V.MINUTULA.....S.HANTZSCHII..FRAGILARIALES...FRAGILARIACEAE....ASTERIONELLA..... A.FORMOSA....DIATOMA.....D.VULGARE....FRAGILARIA.....F.CONSTRUENS V.VENTER.....F.VAUCHEHIAE....SYNEDRA.....S.DELICATISSIMA.....S.RADIANS.. . . .S. ULNA..NAVICULALES...CYMBELLACEAE....AMPHORA.....A.OVALIS.....A.PERPUSILLA....CYMBELLA.....C.MINUTA...GOMPHONEMACEAE....GOMPHONEMA.....G.ANGUSTATUM.....G.OLIVACEUM...NAVICULACEAE....DIPLONEIS.....D.OCULATA....NAVICULA.....N.CAPITATA (5) EHR.-1.....N.CRYPTOCEPHALA.....N.CHYPTOCEPHALA V.VENETA.....N.DECUSSIS (5) OSTR.....N.GREGARIA.....N.MINIMA.....N.MUTICA.....N.PUPULA.....N.RHYNCHOCEPHALA. . . . . N. TRIPUJJCTATA (5) (D.
29
29
29
29
200200
29
290 9
29 <1
29 <1
& 800 24 57 2
29
57
29
29
32 <1
32 <1
96 3
326432
130
96 3130 4
4 390 11
190 6130 4
96 3350 10
32
64
3232
3264
96 3
32 <1
64 2
32 <1
34
2929
329664
3232
32
32
19
2626
26 38 2
2 BO 9
51 2
180 6210 7
ft 670 22
77 319 <1
150 7
19 <1
19
19
39
1939
77
230
3939
58120
26
26 19
19
19
19
19
26
26
Table 4. Pnjrtoplankton data for Orwell ReaerToir Continued
Total
Date:
Time :
Cells/mL:
April 18, 1985
1515
2800
May 15, 1985
1540
2600
June 18, 1985
1700
1300
July 24, 1985
1620
1400
Auj1
1
1
Organism Cells Per- Cells Per- Cells Per- Cells Per- Cells I per mL cent per mL cent per mL cent per mL cent per mL c
S i.t e_ 4_ - T_ Co n.t i n u e d
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHYCEAE..NAVICULALES...NAVICULACEAE....NEIDIUM.....N.AFFINECHLOROPHYTA (GREEN ALGAE).CHLOROPHYCEAE..CHLOROCOCCALES...OOCYSTACEAE....ANKISTRODESMUS....OOCYSTIS....SELENASTRUM....TETRAEDRON...SCENEDESMACEAE....CRUCIGENIA....SCENEDESMUS..TETRASPORALES...COCCOMYXACEAE....ELAKATOTHRIX...PALMELLACEAE....GLOEOCYSTISCHRYSOPHYTA (YELLOW-GREEN ALGAE).BAC1LLARIOPHYCEAE..CENTRALES...COSCINODISCACEAE....CYCLOTELLA..PENNALES...ACHNANTHACEAE....RHOICOSPHENIA.....R.CURVATA...FRAGILARIACEAE....SYNEDRA...NAVICULACEAE....NAVICULA...NITZSCHIACEAE....NITZSCHIA.CHRYSOPHYCEAE.. CHROMULINALES...CHROMULINACEAE... .CHRYSOCOCCUS....KEPHYRION...OCHROMONADACEAE....DINOBRYON....OCHROMONASCYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE. . OSCILLATORIALES...NOSTOCACEAE....ANABAENAEUGLENOPHYTA (EUGLENOIDS).CRYPTOPHYCEAE. . CRXPTOMONIDALES. . . CRYPTOCHRYSIDACEAE.... CHROOMONAS.... RHODOMONAS...CRYPTOMONODACEAE.... CRXPTOMONAS.EUGLENOPHYCEAE. . EUGLENALES...EUGLENACEAE.... TRACHELOMONASPYRRHOPHYTA (FIRE ALGAE).DINOPHYCEAE..DINOKONTAE...CERATIACEAE....CERATIUM
32100 3
26 <1 26 <1
29
130 4 150 5
32
96 3
32
120 5
19 <1 38 2
19
58
19
29
290 9710 21
32
32
64 2
26
26
26
19
19
19
19
38
38
19
& 1 ,200 55
290 9
66 3
57 2
64 2160 5
96 3
130 4620 21
330 11
38 2 130 210 10 & 680
19
38 2
77 3
250
19
77
35
Table 4. Pbytoplankton data for Orwell Reservoir Continued
Date:
Time:
Total Cells/mL:
September 21, 1985
1750
5000
February 26, 1986
1600
1 DO
May 01 1986
1520
2300
JuJ 1
1
Organism Cells Per- per mL cent
Cells Per- per mL cent
Cells Per- per mL oent
Cells per mL
S11 e_ 4 _ == _ C o n t i n ji e d
BACILLARIOPHYTA (DIATOMS).BACILLAR10PHYCEAE..ACHNANTHALES...ACHNAKTHACEAE....ACHNANTHES... . . A.CLEVEI.....A.HAUCKIANA.....A.LANCEOLATA.....A.LINEARIS.....A.MINUTISSIMA....COCCONEIS.....C.PLACENTULA..BACILLARIALES...KITZSCHIACEAE....NITZSCHIA.....N. ACICULAAIS.....N.AMPHIBIA.....N.DISSIPATA.....N.FRUSTULUM.....N.LINEARIS.....N.PALEA..EUPODISCALES...COSCINODISCACEAE....CYCLOTELLA.....C.COMTA.....C.KUTZINQIANA.....C.MENEQHINIANA.....C.PSEUDOSTELLIQERA....MELOSIRA. . . . .M. AMBIQUA.....M.QRANULATA.....M.GRANULATA V.AUQUSTISS......M.VARIANS....STEPHANODISCUS.....S.ASTREA V.MINUTULA.....S.HANTZSCHII..FRAQILARIALES...FRAGILARIACEAE....DIATOMA.....D.TENUE V. ELONQATUM.....D.VULGARE....FRAQILARIA.....F.CONSTRUENS V.VENTER.....F.PINNATA.. . ..F'. VAUCHERIAE. . ..SYNEDRA.....S.PARASITICA.....S.RUMPENS.....S.ULNA..NAVICULALES...CYMBELLACEAE....AMPHORA..... A.PERPUSILLA...GOMPHONEMACEAE....QOMPHONEMA.....G.OLIVACEUM...NAVICULACEAE....NAVICULA.....N.CRJPTOCEPHALA.....N.CRYPTOCEPHALA V.VENETA.....N.DECUSSIS (5) OSTR.....N.GRBGAHIA.....N.MENISCULUS V.UPSALIEN......N.MINIMA. . . . .N. PUPULA.....N.REINHARDTII (5) (QRU.....N.TRIPUNCTATA (5) (D......N.VIRIDULA
87 2 414 <1
130 3
44
310 6 & 1 ,500 30
MO 9 220 1
44 <1 87 2
44
11
2 22 27 52 2
22
2 25 32 22 2
5 3
2 2
3 2
10 6
5 3
13 8
5 38 52 2
21
21
230 1011 2
21
832121
150 71 ,100 48
21 <1 83 1
6f 200
6666
3302,900
1 ,900270
21
21
21
21
36
Table 4. Pbytoplaakton data for Orwell Reserrolr Continued
Date: September 24, 1985
Time: 1750
Total Cells/mL: 5000
Organism Cells Per-per mL cent
February 1986
1600
140
Cells Per-per mL cent
26, May 01 , 1986
1520
2300
Cells Per-per mL cent
Jul1
1
«
Cellsper mL
CHLOROPHYTA (GREEN ALGAE).CHLOROPHYCEAE..CHLOROCOCCALES...OOCYSTACEAE....ANKISTRODESMUS....CHODATELLA....OOCYSTIS....TETRAEDRON...SCENEDESMACEAE....CRUCIGENIA....SCENEDESMUS..ULOTRICHALES...ULOTRICHACEAE....ULOTHRIX..VOLVOCALES...CHLAMYDOMONADACEAE....CHLAMYDOMONASCHHYSOPHYTA (YELLOW-GREEN ALGAE).BACILLARIOPHYCEAE..CENTRALES...COSCINODISCACEAE....CYCLOTELLA..PENNALES...ACHNANTHACEAE....RHOICOSPHENIA.....R.CURVATA...GOMPHONEMATACEAE....GOMPHONEMA...NAVXCULACEAE....NAVICULA...NITZSCHIACEAK....NITZSCHIA.CHRYSOPHYCEAE..CHROMULINALES...CHROMULINACEAE....CHRYSOCOCCUS....KEPHYRIONCYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE..OSCILLATORIALES...NOSTOCACEAE....ANABAENA....APHANIZOMENON...OSCILLATORIACEAE....OSCILLATOR1AEUGLENOPHYTA (EUGLENOIDS).CRYPTOPHYCEAE..CRYPTOMONIDALES...CRYPTOCHRYSIDACEAE....RHODOMONAS...CRYPTOMONODACEAE....CRYPTOMONAS.EUGLENOPHYCEAE..EUGLENALES...EUGLENACEAE....TRACHELOMONASPYRRHOPHYTA (FIRE ALGAE).DINOPHYCEAE..PERIDINIALES...CERATIACEAE....CERATIUM
Site_4_ ==_Continued
130 3 44 <1
44 <1 87 2
44
44 <1
88 2
44
960 19
440 9
2 2
2 2
2 2
2 2
5 3
2 2
3 2
2 2
21
42 2
21
21
210 9 21 <1
62 3
21 <1
21 <1
130
66200
66200
66
130
66
66
270
1 ,400
130
66
13t
37
Table 4. Phytoplankton data for Orwell Reservoir--Continued
Date:
Time:
Total Cells/nL:
June 19, 1985
0827
1500
July 21, 1985
1650
5000
August 29, 1985
1600
7000
Organism Cells Per- Cells Per- per mL cent per mL cent
Cells Per- per nL cent
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHYCEAE..BACILLARIALES...NITZSCHIACEAE....NITZSCHIA.....N.AMPHIBIA.....N.LINEARIS.....N.PALEA..EUPODISCALES...COSCINODISCACEAE....CYCLOTELLA.....C.KUTZING1ANA.....C.MENEQHINIANA.....C.PSEUDOSTELLIQERA....MELOSIRA.....M.QRANULATA....STEPHANODISCUS.....S.ASTREA V.MINUTULA.....S.HANTZSCHII..FRAGILARIALES...FRAQILARIACEAE....DIATOMA.....D.TENUE V. ELONQATUM....FRAGILARIA.....F.CAPUCINA..NAVICULALES...NAVICULACEAE....NAVICULA.....N.CRYPTOCEPHALA..SURIRELLALES...SURIRELLALCEAE....SURIRELLA.....S.ANGUSTACHLOROPHYTA (GREEN ALGAE).CHLOROPHYCEAE..CHLOROCOCCALES...OOCYSTACEAE....ANKISTRODESMUS....CHODATELLA....SELENASTRUM...SCENEDESMACEAE....ACTINASTRUM....CRUCIGENIA....SCENEDESMUS....TETRASTROM..TETRASPORALES...PALMELLACEAE....SPHAEROCYSTIS..VOLVOCALES...CHLAMYDOMONADACEAE....CHLAMYDOMONAS..ZYGNEMATALES...DESMIDIACEAE....STAURASTRUMCHRYSOPHYTA (YELLOW-GREEN ALGAE).BACILLARIOPHYCEAE..PENNALES...NAVICULACEAE....NAVICULA....PINNULARIA...NITZSCHIACEAE....NITZSCHIA.CHRYSOPHYCEAE..CHROMUHNALES...CHROMULINACEAE....KEPHYRION
42 3
14 <1
190 13
130 9
14 <1
28 2
4 950 19370 7120 2
120 2250 5
180 3
60 <1
120 2640 12180 3
1,300 19360 5
150 10
150 10
69 5 & 290 19
69 5
28 2
141 4
460 9170 3210 4
41 <1
540 11
60 <1
60 <1
120 2
60 <1
360 5 60 <1
250 5
41
60 <1
240 3
38
Table 4. Pnytoplankton data for Orvell Reservoir Continued
Date:
Time:
Total Cells/mL:
June 19i 1985
0827
1500
July 24, 1985
1650
5000
August 29, 1985
1600
7000
Organism Cells Per- Cells Per- Cells Per- per mL cent per mL cent per mL cent
S i£ e_ g _ ==_ £ on.t 1 n u e d
CYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE..OSCILLATORIALES...NOSTOCACEAE....ANABAENA....APHANIZOMENONEUGLENOPHITA (EUGLEN01DS).CRYPTOPHYCEAE..CRIPTOMON1DALES...CBYPTOCHRYS1DACEAE....CHROOMONAS....RHODOMONAS...CRXPTOMONODACEAE....CRYPTOMONAS.EUGLENOPHICEAE..EUGLENALES...EUGLENACEAE....EUGLENA....PHACUS.. ..TRACHELOMONASPYRRHOPHYTA (FIRE ALGAE).DINOPHYCEAE..D1NOKONTAE...CERATIACEAE....CERATIUM...PERIDINIACEAE....PER1DINIUM
55 4
14 <1 97 6
42 3
28 2
83 2 120 2 41 <1
370 7
170 3
120 2
120 2120 2
60 <1360 5120 2
620 12 & 2,000 29
41 <1
39
Table 4. Phytoplankton data for Orwell Reservoir Continued
Date:
Time :
Total Cells/mL:
September 24, 1965
1705
7300
Hay 01, 1986
1414
3000
July 22, 1986
1348
1700
Organism Cells Per- Cells Per- per mL cent per mL cent
Cells Per- per niL cent
S i.t e_ 5 _ = - _ C p n_t i n u e d
BACILLARIOPHYTA (DIATOMS).BACILLARIOPHXCEAE..BACILLARIALES. . . NITZSCHIACEAE....NITZSCHIA.....N.AC1CULAR1S.....N.AMPHIBIA.....N.FRUSTULUM.....N.PALEA. . EUPODISCALES. . . COSCINODISCACEAE....CYCLOTELLA..... C.KUTZ1NG1ANA..... C.MENEGHIN1ANA..... C. PSEUDOSTELLIGERA....MELOS1RA... . .M.AMBIGOA.....M.GRANULATA.. . .STEPHANODISCUS. . ...S.ASTREA V.M1NUTULA..... S.HANTZSCHII. .FRAG1LARIALES. . .FRAGILARIACEAE... . DIATOMA.....D.TENUE V. ELONGATUM. ...FRAGILAR1A... ..F.CAPUCINA V.MESOLEPTA.. . . ..F.VAUCHERIAE....SYNEDRA..... S. ULNA..NAVICULALES...CIMBELLACEAE. ...AMPHORA..... A.OVAL1S. ..NAVICULACEAE....NAV1CULA..... N. CRYPTOCEPHALA. . . . . N.CRYPTOCEPHALA V.VENETACHLOROPHYTA (GREEN ALGAE).CHLOROPHYCEAE..CHLOROCOCCALES...MICRACT1N1ACEAE....MICRACTINIUM...OOCYSTACEAE.... ANK1STRODESMUS. . ..CHODATELLA.... OOCYSTIS. . . .SELENASTRUM.. . SCENEDESMACEAE.... CRUC1GEN1A. . ..SCENEDESMUS.. VOLVOCALES. . . CHLAMYDOMONADACEAE.... CHLAMYDOMONASCHRYSOPHYTA I YELLOW-GREEN ALGAE).BACILLAR10PHYCEAE. . CENTRALES. . . COSCINODISCACEAE.... COSCINODISCUS.. PENNALES. . . ACHNANTHACEAE....ACHNANTHES. . .NAVICULACEAE... .NAVICULA
67 <1
330 5
670 9670 9
49 2 25 <1 25 <1
49 2
49 2
15
15 <1250 1530 2
15 <1
4 1 ,500 21 A 1 ,100 37 A 930 55 270 4 890 30 130 8
67
49 2
74 2
25
30 2
30 2
67
1 ,000 14 320 11 25 <1
67 <1
130 2540 7 220 7
67
130 2
15
15
151515
89 5
15 <1
30 2
40
Table 4. Phytoplankton data for Orwell Reservoir Continued
Date: September 24, May 01, July 22,1985 1986 1986
Time: 1705 1414 1348
Total Cells/mL: 7300 3000 1700
Organism Cells Per- Cells Per- Cells Per-per mL cent per mL cent per mL cent
Site_5_==_Continued
CHRYSOPHYTA (YELLOW-GREEN ALGAE).CHRYSOPHYCEAE..CHROMULINALES...CHROMULINACEAE....CHRYSOCOCCUS 25 <1....KEPHYRION 67 <1CYANOPHYTA (BLUE-GREEN ALGAE).CYANOPHYCEAE..OSCILLATORIALES...OSCILLATORIACEAE....OSCILLATORIA -- 25 <1EUGLENOPHYTA (EUGLENOIDS).CRYPTOPHYCEAE..CRYPTOMONIDALES...CRYPTOCHRYSIDACEAE....RHODOMONAS 130 2...CRYPTOMONODACEAE....CRYPTOMONAS 270 4.EUGLENOPHYCEAE..EUGLENALES...EUGLENACEAE....EUGLENA 67 <1....TRACHELOMONAS 67 <1 25 <1 15 <1PYRRHOPHYTA (FIRE ALGAE).DINOPHYCEAE..DINOKONTAE...CERATIACEAE....CERATIUM 1,100 15
41
Tab
le 5
. W
ate
r-q
uali
ty d
ata
for
the
infl
ow s
ite t
o O
rvel
l R
eser
voir
[ft3
/s,
cubic
fee
t pe
r se
cond
; uS
/cm
. m
icro
selm
ens
per
centi
met
er;
mg/
L,
mil
ligra
ms
per
lite
r; ,
no dat
a]
Dis
solv
ed
Nit
roge
n
Dat
e
Ap
ril
18
...
May 0
1...
16..
.2
0...
.21...
22...
June 0
5...
18...
July 05
...
19
...
24
...
Aug
ust
08...
29...
Sep
tem
ber
11
...
24...
Feb
ruar
y2
6..
.A
pri
l02...
May 0
2...
Tim
e
16:0
0
13:0
009
:25
13:0
013
:00
14:3
0
14:3
016
:00
13:0
013
:00
15:1
0
09:3
014
:30
10:0
015
:45
17:0
0
13:1
5
08:3
0
Str
eam
-fl
ow,
inst
an
tane
ous
(ft3
/8)
_- 1,
190
1,13
0 ~ 946 874
496
959
1280
Spe
cif
icco
ndu
ct
ance
(uS/
cm)
388 __ 390 373 355 356 354
411
414
382
pH(s
tand
ard
unit
s)
8.4 __ 8.0 __ __ 8
.2 8.2 7
.9 8.2 8.0
7.9
8.2
Tem
per
ature
(deg
rees
Cel
siu
s)
11.0 __
15.0 -_ __
19.0
23.5
19.5
13.5
0.0 4.5
9.5
Oxy
gen,
dis
so
lved
(mg/
L) 1985
10.0 __ 8.7 __
10.1 -- 8.4 8
.8 10
.3
1986
10.3
11.8
10.5
Oxy
gen,
dis
so
lved
(per
cen
tsa
tur
atio
n)
93 __ 88 __ ._ 110 101 97 -- 100 72 92 91
Nit
rite
plu
snit
rate
(mg/
Las
N)
<0.
10 __ .14 __
< .1
0
<
.10
__ .11 <
.10
0.13 .4
1
< .1
0
Am
mon
ia(m
g/L
as N
)
0.0
5
__ .14
-- -_ .. .03
__ .05
..<
.01
.15
0.1
2
.12
.06
Am
mon
iap
lus
org
anic
(mg/
Las
N)
0.6 __ 3.6 .6 .3 .. .4 -- .5
0.6 .8 .5
Pho
spho
rus
Tota
l(m
g/L
as
P)
0.03 .0
2.0
3.0
4.0
4.0
5
.04
.06
.05
.05
.04
.08
.07
.05
.06
0.0
2
.05
.03
Dis
so
lved
ort
ho
(mg/
Las
P)
0.0
2
.. .03 __ __ .0
3
.. .04
__<
.01
-. .03
<0.
01 .01
< .0
1
Table 6. Mater-quality data for the
outflow alt* fro« Orwell Beaervoir
[ft3/a,
cubic feet per
second; uS
/c«,
Icroselaens per
oentlaeter;
g/L
, llligraaa per
liter]
Date
Oct
I960
12
...
Ma
r 1961
19
...
"K...
Ap
r 1
96
2
10
...
Mar
1963
11
.. .
A
ug
19
65
21
...
O
ct
29...
June
1966
21
...
Apr
19
85
18...
May 16
...
Ju
ne
19
...
July
25
...
Au
g3
0..
.S
ep
25
...
Feb
19
86
26
...
Apr
02
...
May 01
...
Str
eaa-
11 O
H,
ina
tan
- T
l»e
taneoua
(ft3
/a)
85
23
3
307
382
527
1,0
10
09
:15
08
:00
07:5
0
07:1
5
07
:30
09
:35
16:3
5
11:1
5
16:0
0
Sp
e
cific
con
duct
ance
(uS
/ca
)
126
16
6
15
5
105
505
38
7
398
389
10
0
39
5
383
368
370
36
7
12
1
118
39
9
PH
(sta
nd
ard
units)
7.5
7.5
7.7
7.2
8.1
7.1
8.2
7.6
8.2
8.1
8.2
8.2
8.1
8.2
7.9
7.9
8.3
Tem
per
atu
re
(de
gre
e
ce
lalu
a)
18
.5
10
.5
10.0
15
.0
18.5
23.5
19
.5
13
.5
0.0
1.0
9.5
Oxyg
en
, dis
so
lve
d
_.
12
.2
9.5
11 .
0
8.8
9.3
10
.7
12.2
13
.8
11.5
Oxygen,
dis
so
lve
d
(pe
r
ce
nt
aatu
r-
atJ
on)
--
11
0
96
119
105
10
2
101 85
106
Ca
lclu
a
dis
so
lve
d
(»g
/L
as
Ca
)
39
13
13
35
17
31
31
35 37 39
-- 35
31
__
15 12 39
Ma
gn
e
siu
m,
dis
solv
ed
( g
/L
as
Mg)
29
31
30
28
35
26
28
27 27 27 -- 25
26 __ 31 27 26
Table b.--Mater-quality data for the
outflow site fro* Orwell i«ser»oir--Continueo
Got
Har
Apr
Har
Aug
J une
Apr
Feb
Date
1960 12.
. .
1961 19...
Hay 11..
.1962 10..
.1963 11...
1965
21..
.Oct 29...
1966
21 ...
1985 18...
May 16..
.June
19..
.July
25...
Aug 30...
Sep 25...
1986 26...
Apr
02..
.Ha
y 01...
SodluB,
dis
solved
( g/L
as Na
)
8.2
8.6
7.9
7.2
9.6
6.9
7.1
6.5
9.0
8.1 --
7.8
7.8 --
9.2
7.9
7.1
Potas-
SiUB,
dis
solved
( g/L
88 K)
1.2
1.6
1.1
1.5
1.2
3-3
1.1
3.1
1.1
< .1 --
3.1
3.3 -- 3.1
1.6
1.1
Alka
linity
( g/
L as
CaC03
)
-- -- 191
196
192
191
186
191
192
190
195 --
201 --
Sulfate
dis-
sol ve
d( g/L as
S04
)
20 19 32 27 23 13 21 11 19 27 11 9.1
11 9.3
15 26 17
Cblo-
rlde,
dis
solved
( g/L
as Cl)
3.7
1.1
2.7
3-3
1.3
3.7
1.2
3.1
8.1
7.1
6.8
6.9
6.8
7,5
8.8
8.0
7.2
Fluo-
rlde,
dis
solved
( g/L
as F)
0.2 .2 .3 .2 .3 .2 .2 .2 . 1
. 1
.2 .2 .2 .1 .1 . 1
. 1
Silica,
dis
solved
( g/L
asS102
)
9.8
16 10 15 17 13 13 9.5
10 11 __ 15 15 __ 19 15 10
Solids,
residue
at 180°C
dis
solved
( g/L) 218
275
267
216
299
226
239
250
225
281 __
213
229
211
266
265
216
Soli
ds,
dis
solved
(ton
spe
r da
y)
57 173
221
287
185
233
310
702 _- -- __ __ __ __ __ -- --
Nitrite
plus
nl tra
tedi
ssolved
( g/L
aa N)
-- -- -_ -- --
<0.10
.15
< .10
< .10
< .10
< .10
.13
.58
< .10
Table 6. Hater-quality data fo
r tn
e outflow alta fro* Orvall Beaervolr--Continuea
Got
Mar
Apr
Nar
Aug
Jun<
Apr
Feb
Dat
a
196
01
2..
.19
61 19
...
Nay 14
...
19
62
10
...
19
63
14
...
1965
21 ...
Got
29
...
9 19
6621
...
19
85
18.. .
Nay 16
...
Jun
e1
9..
.Ju
ly25...
Aug 30
...
Sap 2
5..
.19
862
6..
.A
pr
02...
Na> 01
...
Nit
rogen
i«A
MO
Qla
plu
aA
aaonia
org
anic
to
tal
tota
l
-_ --
-
__ __ --
0.0
9
1.0
.11
1.7
< .0
1
0.9
.05
1.0
< .0
1
.6
< .0
1
.6
.14
.8
.15
.8
.03
.8
BtL
a.
MJ
AM
oo
ia
plu
a
Phosp
horu
sorg
anic
dis
solv
ed
Tota
l
__ __ _
__ __
--
__ 0.8
0.0
6
1.6
.0
7
.8
.06
.3
.06
.5
.06
.5
.06
.8
.03
.7
.05
.5
.05
.iar
t ! _
- P
iD
is
solv
ed
-- __ -- _
--
0.0
7
< .0
1
.03
.03
.05
.04
.02
.03
.01
Grf
aolo
C
arbo
n i«
Dis
- T
ota
l ao
lvad
__ __ ._
--
__ __ _
-
__
7.2
8.4
8.8
9.7
7.9
7.8
6.7
7.9
8.5
ILL
a.
Cj
Su
a-
pen
aed
-- -- __ -_ -- _-
-- -- 1.2 .6
1.0 .3 .5 .3 .5 .7
Table ? Hean-daily streaaflow for the inflow site to Orwell Heservoir, April 2, 1985, to September 30, 1985
[Values in cubic feet per second]
Day
12345
6789
10
1112131415
1617181920
2122232425
262728293031
April
wm
488446470470
478423423532511
540580593610622
616662557590582
606615708815776
938795774753749
May
750714715736690
652757724709720
719886
1,1001,0201,090
1,1301,1101,0901,0701,140
9681,0401,0301,0201,040
1,0301,0301,0201,0201,0401,120
June
1,3101,4601,2801,2401,140
1,2201,2301,1901,1401,120
1,2401,3401,2001,2301,190
1,2601 ,2001,2701,2201,260
1,2901,2901,2601,2401,240
1,3201,3201,3201,3301,300
July
1,2901,2801,2401,2401,150
1,1801,1401,1301,1401,110
1,0801,0601,0601,0301,020
977974
1.0301.0601.070
1,0801,0801,0701,1601,140
1,0901,1601,0301,0601,1001,110
August
1,1001,1101,0901,0901,090
1,0701,0701,0501,0401,120
9281,0701,1601,1401,120
1,0901,0701,0401,0201,000
972987
1,020974923
933937886999919947
Septeml
908916913947934
931939925941948
930937906906906
914905899892897
893875820861850
836799837820794
46
Tab
le 8.
Mean
-dril
y
strea
afl
ov
fo
r th
e in
flov sit
e
to
Orv
ell
Res
ervoir
, O
cto
ber
1,
1935,
to
Sep
tem
ber
30,
1966
[Val
ues
in
cu
bic
fe
et
per
se
'cond]
Da
y 1 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 18 19 20
21 22
23
24
25 26
27
28
29
30
31
Oct
82
37
92
808
782
787
792
780
772
786
791
829
929
881
915
878
952
86
18
82
880
86
9
88
98
96
926
90
4902
89
5879
875
88
0931
90
4
Nov
901
916
895
89
59
01
90
6908
90
9852
86
8
74
7833
863
855
772
723
789
76
1878
87
4
80
7722
792
629
592
678
641
67
76
84
673
Dec
66
67
46
62
76
62
655
682
661
691
68
4695
691
65
6646
625
68
1
644
630
625
633
628
611
549
579
604
612
651
614
56
95
99
588
611
Ja
n
58
25
57
602
57
0583
57
85
21
53
95
99
585
599
59
7567
585
579
57
9582
57
0591
603
58
8581
63
1632
60
0
559
553
587
566
554
55
4
Fe
b
554
564
566
580
585
57
7594
582
57
7569
605
58
4584
539
549
559
567
537
562
558
54
5643
639
613
590
602
59
1598
...
...
Mar
592
60
7595
541
590
605
601
643
635
602
581
629
615
646
639
656
679
614
616
682
657
661
748
805
74
1
785
88
01
,160
1,0
90
1,3
30
1,3
50
ipr
943
912
957
91
29
59
965
939
90
98
67
9«
1
86
6891
85
79
29
1,0
90
870
1,1
90
1 ,4
00
85
11
,220
,16
0,1
70
,200
,190
,180
,190
,190
,220
,230
,240
Ma
y
,320
,360
,320
,300
,280
,280
,27
0,3
00
,46
0,6
90
,46
0,5
60
,550
,500
,520
,500
,51
0,5
00
,«90
,510
,470
,460
,450
,510
,520
,520
,580
,540
,550
,550
,520
Ju
ne
,47
0,4
50
,420
,470
,400
,410
,440
,430
,420
,420
,53
0,4
50
,400
,360
,400
,390
,250
,240
,170
,410
,380
,430
,370
,34
0,2
20
,240
,160
,15
0,1
20
,060
July
1 ,0
40
93
9889
98
31
,06
0
1 ,0
00
1 ,0
20
1 ,0
20
98
09
50
959
97
79
27
930
919
95
69
15
88
38
68
90
8
869
790
752
775
74
0
72
0744
75
37
37
70
5688
Aug
Sep
651
570
681
58
3632
785
632
76
6603
64
0
62
6
66
05
47
6
45
58
4
610
597
610
65
1
615
628
625
60
3
60
07
12
5
97
628
564
62
1
595
601
63
0604
659
56
7
72
2543
69
96
21
743
587
755
66
5
803
70
7
837
62
6
814
63
3
1 ,0
60
73
6
821
44
1
790
58
4
806
55
3
808
55
5
78
15
30
Table 9. Mean-dally streaaflow for tne outflow site from Orwell Beservior,April 1, 1985 to September 30, 1985
[Values in cubic feet per second]
Day
12345
6789
10
1112131415
1617181920
2122232425
262728293031
April
527591510502496
486482441418432
446474503520532
535594640633630
624622632675717
791853843829817
May
806794781772760
726708711712712
720751877985
1,000
1,0201,0401,0401,050
998
968981992993
1,000
1,0101,0201,0201,0201,020
961
June
874709779891944
9621,0201,0801,1001,060
1,0401,1001,1201,1301,130
1,1201,1201,1201,1201,120
1,1701,1901,1901,1901,190
1,2201,2501,2601,2601,260
July
1,2501,2501,2401,2501,190
1 ,0801,0901,1301,1601,150
1,1501,1401,1401,1301,110
1,0901,0901,0801,0801,070
1,0701,0601,0601,1001,170
1,1801,1801,1801,1601,1401,140
August
1,1401,1401,1301,1401,130
1,1301,1301,1201,1201,120
1,1101,1201,1101,1101,110
1,1101,1101,1001,1001,090
1,0801,0801,0801,0701,060
1,0601,050952892892892
September
893896898899899
904905910911913
915917917917917
920921920921923
920916916912911
909880855855833
48
Table 10. Mean-dally streaaflov for
tbe
outflow site from Orvell BeoerToir,
October 1,
19
85,
to September 30,
1986
[Values In
cubic
feet per
second]
Da
y 1 2 3 4 5 6 7 8 910 11 12 13 1
415 16 17 18 19 20
21 22
23 24
25 26 27 28
29
30
31
Oct
860
850
843
84
38
45
84
48
31
81
8784
760
76
57
76
783
789
797
805
81
18
27
854
859
864
86
9884
90
19
05
912
915
915
92
0925
925
No
v
927
927
926
926
924
927
92
795
096
19
54
94
8942
937
931
920
91
09
01
89
68
96
89
4
88
58
53
81
37
73
68
5
689
69
06
94
69
6697
Dec
70
77
67
776
76
8763
80
3830
827
82
48
23
830
83
08
42
82
5816
820
83
28
42
811
804
79
07
71
79
99
70
850
76
8767
74
87
43
73
4730
Ja
n
71
87
07
703
701
715
854
88
0732
67
56
65
66
26
64
658
658
65
6
653
650
64
96
52
64
6
67
9706
70
26
55
69
3
88
2955
78
67
88
692
669
Fe
b
659
639
62
76
21
613
60
8642
83
28
78
861
81
6817
80
3784
721
618
59
96
32
683
79
0
779
626
64
0688
58
8
58
05
70
566
-__
__
_
Mar
56
0558
585
60
16
03
62
16
44
611
609
610
60
7606
608
623
64
2
642
67
1696
669
64
6
64
76
50
658
70
97
50
63
2272
58
61198
635
Ap
r
1 ,0
20
1 ,0
60
1 ,0
50
1 ,0
50
1 ,0
50
1 ,0
40
1 ,0
30
1 ,0
20
980
949
919
913
908
91
3942
78
65
47 92
1 ,2
20
1 ,2
20
1 ,2
20
1 ,2
20
1 ,2
20
1 ,2
20
1 ,2
10
1 ,2
20
1 ,2
20
1 ,2
20
1 ,2
20
1 ,2
20
May
1 ,2
20
1,2
30
1,2
30
1 ,2
40
1 ,2
40
1,2
50
1 ,2
40
1 ,2
50
1 ,2
60
1 ,4
30
1 ,5
40
1 ,5
30
1 ,4
70
1 ,4
40
1 ,4
40
1 ,4
50
1,4
50
1 ,4
50
1,4
70
1 ,4
90
1,4
90
1 ,4
90
1,4
90
1 ,5
00
1 ,5
00
1,5
00
1 ,5
60
1 ,6
00
1 ,6
00
1 ,6
00
1 ,6
00
Jun
e
,590
,590
,580
,580
,58
0
1 ,5
70
1 ,5
70
1 ,5
60
1 ,5
50
1 ,5
50
1 ,5
50
1 ,5
40
1 ,5
20
1 ,5
20
1 ,5
10
1 ,5
00
1,3
90
1 ,2
40
1,1
90
1,2
30
1,2
70
1 ,2
80
1,3
20
1,3
60
1 ,3
50
,340
,280
,240
,240
,17
0
July
1 ,0
80
96
99
19
928
931
933
954
990
1 ,0
00
1 ,0
00
999
997
997
975
954
941
928
90
8898
89
8
87
983
0767
74
5725
710
714
718
71
77
00
678
Aug
65
1631
627
627
623
62
1582
554
55
75
60
57
85
93
657
69
86
76
641
639
617
573
561
56
25
89
641
656
653
650
623
604
578
56
0560
Sep
560
56
36
19
65
06
50
65
06
50
65
06
50
65
0
65
06
50
64
76
45
625
61
0614
61
6644
66
2
669
611
570
577
809
928
933
927
924
917
