134
Harvey H. Harper, Ph.D.,P.E. Gloria Eby East Crystal Chain-of-Lakes Hydrologic/Nutrient Budgets & Management Plans Project Summary October 16, 2014
Harvey H. Harper, Ph.D.,P.E. Gloria Eby
East Crystal Chain-of-Lakes Hydrologic/Nutrient Budgets
& Management Plans
Project Summary
October 16, 2014
Vicinity Map for the East Crystal Chain-of-Lakes
LakeMonroe
LakeJesup
East Crystal Chain
Scope of Work Objectives – Develop hydrologic and nutrient budgets. Prioritize pollutant
inputs, develop lake management plans and conceptual retrofit projects. 1. Attend project kick-off meeting 2. Review available data 3. Field Reconnaissance 4. Routine surface water monitoring - evaluate ambient water characteristics - monthly monitoring in each lake 5. Inflow Monitoring - Identify significant inflows into the four lakes - Collect runoff samples 6. Groundwater Seepage - Install groundwater seepage meters - Conduct 8 monitoring events over 12 month period
7. Bathymetric surveys 8. Sediment Characterization 9. Hydrologic Modeling - develop watershed models to estimate inputs from direct runoff 10. Develop Hydrologic Budgets
11. Develop nutrient budgets
12. Develop lake management plans 13. Prepare Draft Final Report
14. Review meeting with Seminole County 15. Prepare/give presentation to BLHOA
16. Prepare Final Report
Scope of Work – cont.
Probing Locations for Water and Muck Depth Contours in East Crystal Lake
Probing Locations for Water and Muck Depth Contours in Belair, Amory, and
Deforest Lakes
Bathymetric Contour Map for East Crystal Lake
(Elevations, NGVD)
Bathymetric Contour Map for Belair Lake (Elevations, NGVD)
Bathymetric Contour Map for Amory Lake (Elevations, NGVD)
Bathymetric Contour Map for Deforest Lake
(Elevations, NGVD)
Bathymetric Characteristics of East Crystal, Belair, Amory, and Deforest Lakes
Lake Area
(acres) Volume (ac-ft)
Mean Depth
(ft)
Maximum Depth
(ft)
Shoreline Length
(ft)
Shoreline Development
East Crystal 92.8 308 3.4 13 31,456 4.41
Belair 23.7 95.7 3.7 13 7,387 1.54
Amory 8.79 17.7 3.4 16 4,126 1.88
Deforest 11.8 62.2 4.6 13 2,804 1.10
Muck Depth Contours (ft) in East Crystal Lake on February 29, 2012
Muck Depth Contours (ft) in Belair Lake on February 16, 2012
Muck Depth Contours (ft) in Amory Lake on
April 4, 2012
Muck Depth Contours (ft) in Deforest Lake on
February 28, 2012
Newly formed lake - few nutrients - low productivity - little sediment
Middle aged lake - increasing nutrients - moderate prod. - increasing sediment - decreasing depth
Aging lake - high nutrients - high productivity - deep sediments - plant invasions
Excessive Nutrient Additions Can Accelerate Lake Aging
Locations of Sediment Sampling Sites in East
Crystal Lake
Locations of Sediment Sampling Sites
in Belair, Amory, and Deforest Lakes
Photographs of Typical Sediment Characteristics in East Crystal Lake
Organic muck overlying grey fine sand & peat Dark brown organic muck overlying light brown sand
Thin organic muck layer overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in East Crystal Lake
Organic muck overlying grey fine sand & peat Dark brown organic muck overlying light brown sand
Thin organic muck layer overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in East Crystal Lake
Organic muck overlying grey fine sand & peat Dark brown organic muck overlying light brown sand
Thin organic muck layer overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in East Crystal Lake
Organic muck overlying grey fine sand & peat Dark brown organic muck overlying light brown sand
Thin organic muck layer overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in East Crystal Lake
Organic muck overlying gray fine sand and peat Dark brown organic muck overlying light brown sand
Thin organic muck layer overlying deep peat layer Dark brown organic muck overlying brown peat
Photographs of Typical Sediment Characteristics in Belair Lake
Dark brown organic muck overlying gray fine sand Dark brown organic muck overlying brown peat
Light brown organic muck overlying brown peat Dark brown organic muck overlying dark brown peat
Dark brown organic muck overlying grey fine sand Dark brown organic muck overlying brown peat
Light brown organic muck overlying brown peatDark brown organic muck overlying dark brown peat
Sediment Characteristics in Bel-Air Lake
Dark brown organic muck overlying grey fine sand Dark brown organic muck overlying brown peat
Light brown organic muck overlying brown peatDark brown organic muck overlying dark brown peat
Sediment Characteristics in Bel-Air Lake
Dark brown organic muck overlying grey fine sand Dark brown organic muck overlying brown peat
Light brown organic muck overlying brown peatDark brown organic muck overlying dark brown peat
Sediment Characteristics in Bel-Air Lake
Dark brown organic muck overlying grey fine sand Dark brown organic muck overlying brown peat
Light brown organic muck overlying brown peatDark brown organic muck overlying dark brown peat
Sediment Characteristics in Bel-Air Lake
Photographs of Typical Sediment Characteristics in Amory Lake
Light gray fine sand overlying brown fine sand Brown fine sand mixed with organics
Thin organic muck layer overlying gray fine sand Brown fine sand
Light grey fine sand overlying brown fine sand Brown fine sand mixed with organics
Thin organic muck layer overlying grey fine sandBrown fine sand
Sediment Characteristics in Amory Lake
Light grey fine sand overlying brown fine sand Brown fine sand mixed with organics
Thin organic muck layer overlying grey fine sandBrown fine sand
Sediment Characteristics in Amory Lake
Light grey fine sand overlying brown fine sand Brown fine sand mixed with organics
Thin organic muck layer overlying grey fine sandBrown fine sand
Sediment Characteristics in Amory Lake
Light grey fine sand overlying brown fine sand Brown fine sand mixed with organics
Thin organic muck layer overlying grey fine sandBrown fine sand
Sediment Characteristics in Amory Lake
Photographs of Typical Sediment Characteristics in Deforest Lake
Organic muck and detritus overlying gray fine sand Dark brown organic muck overlying dark brown peat
Brown organic muck overlying deep peat layer Dark brown organic muck overlying brown peat
Organic muck & detritus overlying grey fine sand Dark brown organic muck overlying dark brown peat
Brown organic muck overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in DeForest Lake
Organic muck & detritus overlying grey fine sand Dark brown organic muck overlying dark brown peat
Brown organic muck overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in DeForest Lake
Organic muck & detritus overlying grey fine sand Dark brown organic muck overlying dark brown peat
Brown organic muck overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in DeForest Lake
Organic muck & detritus overlying grey fine sand Dark brown organic muck overlying dark brown peat
Brown organic muck overlying deep peat layerDark brown organic muck overlying brown peat
Sediment Characteristics in DeForest Lake
Historical Water Quality Monitoring Sites
in the East Crystal Chain-of-Lakes
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
BELAIR-1
BELAIR-2
BELAIR-3
DEFOREST-2
DEFOREST-3
EC-1
EC-2
EC-3
AMORY-1
AMORY-2
AMORY-3
27140
CL02
CL03
CL01
LegendWQ StationsBasin BoundaryLakes
WetlandsFreshwater MarshWet PrairiesWetlands
600 0 600 1,200 1,800 2,400300Feet
Lake Trophic State Classifications
- Low in nutrients - Few algae grow - No algal blooms - Water is very clear - Support very few plants and fish - About 12% of Florida lakes - Water clarity > 12 feet - Chlorophyll < 3 micrograms/liter - Total P < 15 micrograms/liter
- Moderate in nutrients - Moderate algal production - Periodic algal blooms - Slightly green water - Support moderate amounts of plants and fish - About 31% of Florida lakes - Water clarity 8 – 12 feet - Chlorophyll 3 - 7 micrograms/liter -Total P 15 to 25 micrograms/liter
Oligotrophic Lakes
Mesotrophic Lakes Figure 2-15c
Seepage Meter
Float
Lake Trophic State Classifications
- High in nutrients - High level of algal production - Frequent algal blooms - Green water with poor visibility - May have large amount of plants - About 41% of Florida lakes - Water clarity 3 - 8 feet - Chlorophyll 7 to 40 micrograms/liter - Total P 25 to 100 micrograms/liter
Eutrophic Lakes
- Very high in nutrients - Extremely high algal production - Virtually constant algal blooms - Most biologically productive lakes - Support large amounts of plants and fish - About 16% of Florida lakes - Water clarity < 3 feet - Chlorophyll > 40 micrograms/liter - Total P > 100 micrograms/liter
Hyper-Eutrophic Lakes
TSI Values in East Crystal Lake from 1990-2013
Trophic State Index
Date
1/90 1/92 1/94 1/96 1/98 1/00 1/02 1/04 1/06 1/08 1/10 1/12 1/14
TSI
0
20
40
60
80
100
TN/TP Ratio
Date
1/90 1/92 1/94 1/96 1/98 1/00 1/02 1/04 1/06 1/08 1/10 1/12 1/14
TN/T
P R
atio
0
100
200
300
400
500
East Crystal
Oligotrophic
Mesotrophic
Eutrophic
Hypereutrophic
Phosphorus Limited
Balanced
TSI Values in Amory and Deforest Lakes
Trophic State Index
Date
1/96 1/98 1/00 1/02 1/04 1/06 1/08 1/10 1/12 1/14
TSI
0
20
40
60
80
100
TN/TP Ratio
Date
1/96 1/98 1/00 1/02 1/04 1/06 1/08 1/10 1/12 1/14
TN/T
P R
atio
0
20
40
60
80
100
120
140
Deforest
Oligotrophic
Mesotrophic
Eutrophic
Hypereutrophic
Phophorus Limited
Balanced
Nitrogen Limited
slope = -0.0024p = 0.0038
slope = 0.0022p = 0.0951
Deforest Lake
Trophic State Index
Date
1/00 1/01 1/02 1/03 1/04 1/05 1/06 1/07 1/08 1/09 1/10 1/11 1/12 1/13 1/14
TSI
0
20
40
60
80
100
TN/TP Ratio
Date
1/00 1/01 1/02 1/03 1/04 1/05 1/06 1/07 1/08 1/09 1/10 1/11 1/12 1/13 1/14
TN/T
P R
atio
0
20
40
60
80
100
120
140
Amory
Oligotrophic
Mesotrophic
Eutrophic
Hypereutrophic
Nitrogen Limited
Balanced
Phosphorus Limited
Amory Lake
Locations of Surface Water Monitoring Sites
EastCrystalLake
Figure 2.52 a
AmoryLake
DeforestLake
BelairLake
Figure 2.52 b
Variability in Calculated Trophic State Indices (TSI) in the East Crystal Chain-of-Lakes from
November 2010-December 2011 Trophic State Index
Date
11/1/10 1/1/11 3/1/11 5/1/11 7/1/11 9/1/11 11/1/11 1/1/12
TSI
0
10
20
30
40
50
60
70
80
Amory - TopBelair - TopCrystal - TopDeforest - Top
TN/TP Ratio
Date
11/1/10 1/1/11 3/1/11 5/1/11 7/1/11 9/1/11 11/1/11 1/1/12
TN/T
P
0
50
100
150
200
250
Amory - TopAmory - Bottom
Belair - TopBelair - Bottom
Crystal - TopCrystal - Bottom
Deforest - TopDeforest - Bottom
Oligotrophic
Mesotrophic
Eutrophic
Hypereutrophic
Nitrogen LimitedBalanced
Phosphorus Limited
Recorded Water Elevations in East Crystal Lake from 1993-2013 (Source: Seminole County)
East Crystal Lake Historic Water Elevations
Year92 94 96 98 00 02 04 06 08 10 12 14
Wat
er E
leva
tion
(NA
VD
)
30
32
34
36
38
40
42
44
CWL - Belair (38.51 ft)
Hydrologically Isolated
Recorded Water Elevations in Belair Lake from 1993-2013 (Source: Seminole County) Belaire Lake Historic Water Elevations
Year94 96 98 00 02 04 06 08 10 12 14
Wat
er E
leva
tion
(NA
VD
)
32
34
36
38
40
42
44
46
CWL - East Crystal (38.51 ft)
CWL - Deforest (36.63 ft)
Hydrologically Isolated
Recorded Water Elevations in Amory Lake from 1993-2013 (Source: Seminole County)
Amory Lake Historic Water Elevations
Year92 94 96 98 00 02 04 06 08 10 12 14
Wat
er E
leva
tion
(NA
VD
)
34
36
38
40
42
44
CWL - Culvert (41.04 ft)
Hydrologically Isolated
Recorded Water Elevations in Deforest Lake from 1993-2013 (Source: Seminole County)
Deforest Lake Historic Water Elevations
Year92 94 96 98 00 02 04 06 08 10 12 14
Wat
er E
leva
tion
(NA
VD
)
32
34
36
38
40
42
44
CWL - Outfall (42.37 ft)
CWL - Belair (36.63 ft)
Hydrologically Isolated
Photographs of Water Level Conditions in East Crystal Lake from November 2010-December 2011
Bottom areas of East Crystal Lake drying out Lake bottom becoming colonized with grasses
Lake bottom converted to recreational use East Crystal Lake to Belair Lake Canal
Bottom areas of East Crystal drying out Lake bottom becoming colonized with grasses
East Crystal to Belair Lake Canal Lake bottom converted to recreactional use
Figure 2-70
Bottom areas of East Crystal drying out Lake bottom becoming colonized with grasses
East Crystal to Belair Lake Canal Lake bottom converted to recreactional use
Figure 2-70
Bottom areas of East Crystal drying out Lake bottom becoming colonized with grasses
East Crystal to Belair Lake Canal Lake bottom converted to recreactional use
Figure 2-70
Bottom areas of East Crystal drying out Lake bottom becoming colonized with grasses
East Crystal to Belair Lake Canal Lake bottom converted to recreactional use
Figure 2-70
Overall Drainage Basin Delineations for East
Crystal, Belair, Amory, and Deforest Lakes
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendPipes
BasinBoundaries
Lakes
µ
1,000 0 1,000 2,000 3,000500Feet
Overview of Sub-basin Areas for the East Crystal
Chain-of-Lakes
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01D02
D03
DeforestDirect
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09
EC10
LegendPipes
BasinBoundaries
Sub BasinBoundaries
Lakes
µ
1,000 0 1,000 2,000 3,000500Feet
Summary of Calculated Basin Area / Lake Area Ratios for East Crystal, Belair, Amory, and Deforest Lakes
Lake Lake Area1
(acres)
Drainage Basin Area
(acres)
Drainage Basin/ Lake Area Ratio
East Crystal 92.80 469.6 5.1
Belair 23.73 90.3 3.8
Amory 8.79 168.2 19.1
Deforest 11.82 77.6 6.6
1. Reflects lake areas at elevation 39.0 ft
Elevation Contours in the East Crystal, Belair,
Amory, and Deforest Lakes Drainage Basins
(Datum: NAVD 88)
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendBasin Boundaries
Contour40 - 45
46 - 50
51 - 55
56 - 60
61 - 65
66 - 70
71 - 751,000 0 1,000 2,000500Feet
µ
Governmental Jurisdictions in the East Crystal Chain-of-Lakes
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01D02
D03
DeforestDirect
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09EC10
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendPipes
Lakes
BasinBoundaries
Sub BasinBoundaries
Jurisdiction
LAKE MARY
SANFORD
µ
1,000 0 1,000 2,000 3,000500Feet
Existing Land Use Characteristics in the East Crystal, Belair, Amory, and Deforest
Lakes Drainage Basins
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01 D02
D03Deforest
Direct
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09EC10
AmoryLake
BelairLake
DeforestLake
EastCrystal
LakeLegend
Basin Boundaries
Sub Basin Boundaries
Land UseLDR
MDR
HDR
Institutional
Golf Course
Transportation
Utility
Open
Upland Forest
Wetlands
Wet Pond
Ponds
Lakes1,000 0 1,000 2,000500
Feet
µ
Hydrologic Soil Groups in the East Crystal, Belair,
Amory, and Deforest Lakes Drainage Basins
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01 D02
D03Deforest
Direct
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09EC10
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendBasin Boundaries
Sub Basin Boundaries
Hydrologic Soil GroupA
A/D
W1,000 0 1,000 2,000500Feet
µ
Stormwater Treatment in the East Crystal, Belair,
Amory, and Deforest Lakes Drainage Basins
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01D02
D03
DeforestDirect
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09EC10
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendPipes
BasinBoundaries
Sub BasinBoundaries
Lakes
Dry Pond
Wet Pond
StormwaterTreatment Areas
Dry Pond
Wet Pond
Dual Pond
µ
1,000 0 1,000 2,000 3,000500Feet
Sewage Disposal Methods in the East Crystal, Belair,
Amory, and Deforest Lakes Drainage Basins
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01D02
D03
DeforestDirect
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09EC10
AmoryLake
DeforestLake
EastCrystal
Lake
LegendLakes
BasinBoundaries
Sub BasinBoundaries
WastewaterSeptic Tanks
Sewer
µ
1,000 0 1,000 2,000 3,000500Feet
Summary of East Crystal Chain-of-Lakes Basin Parcels Using Septic Tanks and Central
Sewer Systems for Wastewater Disposal
Basin Number of
Parcels with Septic Tanks
Number of Parcels with
Central Sewers
Percent of Developed Area
Using Septic Tanks (%)
Amory 36 55 40
Belair 13 176 7
Deforest 32 0 100
East Crystal 417 240 63
Total: 498 471 51
Conceptual Schematic of Evaluated Hydrologic Inputs and Losses to the East Crystal Chain-of-Lakes
Lake JessamineHydrologic Budget Components
Δ Storage
Precipitation Evaporation
Runoff/Baseflow
GroundwaterSeepage
Lake Outflow
Deep Recharge
East Crystal Chain-of-Lakes Hydrologic Budget Components
Summary of Mean Monthly Rainfall in the Orlando Area from 1942-2005
Month Rainfall Depth
(inches) Month
Rainfall Depth (inches)
January 2.73 July 6.86
February 2.93 August 7.75
March 3.87 September 6.16
April 2.32 October 3.71
May 3.28 November 2.23
June 6.95 December 2.35
Total: 51.14
Areas in the East Crystal Chain-of-Lakes Drainage
Basin that Receive Additional Attenuation in Ponds and Depressions
A01
AmoryDirect
B01
B02
B03
BelairDirect
D01 D02
D03Deforest
Direct
EC Direct
EC01
EC02
EC03
EC04 EC05
EC06
EC07
EC08
EC09EC10
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendBasin Boundaries
Sub Basin Boundaries
Attenuation AreasDepression
Pond
Depression
Pond1,000 0 1,000 2,000500Feet
µ
Typical Seepage Meter Installation
Seepage Meters Being Prepared for Installation
Locations of Seepage Meter Monitoring Sites
in the East Crystal Chain-of-Lakes
1
2
3
12
3
4
5
1
10
2
3 4
5
6
7
8
9
1
2
34
AmoryLake
BelairLake
ClosedBasin
DeforestLake
EastCrystalLake
UnnamedLake
LegendSeepage SitesBasins
600 0 600 1,200 1,800 2,400300Feet
Photographs of Damaged and Exposed Seepage Meters in the East Crystal Chain-of-Lakes
Seepage meter uprooted and placed near shore Seepage meter exposed in Belair Lake
Seepage meter on dry land in East Crystal Lake Seepage meter exposed in Amory Lake
Seepage meter uprooted and placed near shore
Seepage meter on dry land in East Crystal Lake
Seepage meter exposed in Bel-Air Lake
Seepage meter exposed in Amory Lake
Figure 4-4
Seepage meter uprooted and placed near shore
Seepage meter on dry land in East Crystal Lake
Seepage meter exposed in Bel-Air Lake
Seepage meter exposed in Amory Lake
Figure 4-4
Seepage meter uprooted and placed near shore
Seepage meter on dry land in East Crystal Lake
Seepage meter exposed in Bel-Air Lake
Seepage meter exposed in Amory Lake
Figure 4-4
Seepage meter uprooted and placed near shore
Seepage meter on dry land in East Crystal Lake
Seepage meter exposed in Bel-Air Lake
Seepage meter exposed in Amory Lake
Figure 4-4
Estimated Seepage Inflow to the East Crystal Chain-of-Lakes from September 2010-March 2012
Parameter Units
East
Crystal
Lake
Belair
Lake
Amory
Lake
Deforest
Lake
Lake Area acres 92.8 23.7 8.79 11.8
Mean Seepage Inflow liters/m2-day 0.22 0.57 0.52 0.51
ac-ft/year 24.5 16.2 5.50 7.21
Seepage/Surface Area
Ratio ft/yr 0.26 0.68 0.62 0.61
Isopleths of Mean Seepage Inflow into the East Crystal Chain-of-Lakes from September
2010-March 2012 0.3
0.2
0.7
0.3
0.2
0.2
0.4
0.6
0.3
0.5
0.3
0.4
0.6
0.4
0.5
0.3
0.5
0.5
0.3
0.3
0.2
0.1
600 0 600 1,200 1,800 2,400300Feet
LegendSeepage Sites
Seepage Contour
Seepage (liters/m^2-day)High : 0.8
Low : 0
Estimated Annual Aquifer Recharge Rates in the East
Crystal Chain-of-Lakes (Source: SJRWMD)
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendBasin Boundaries
Recharge 2005
0 - 4 In/Yr
4 - 8 In/Yr1,000 0 1,000 2,000500Feet
µ
Estimated Annual Deep Recharge Losses from the East Crystal Chain-of-Lakes
Lake Estimated Deep Recharge Loss
inches/year ac-ft/yr
East Crystal Lake 2.7 20.6
Belair Lake 3.8 7.5
Amory Lake 4.4 3.9
Deforest Lake 4.7 4.6
Wetland Areas Contiguous with the East Crystal Chain-of-Lakes
Summary of Estimated Annual Evapotranspiration Losses from Contiguous Wetland and Marsh
Areas in the East Crystal Chain-of-Lakes
Lake Wetland / Marsh Area
(acres) ET Losses1
(ac-ft/yr)
Amory 0.23 0.9
Belair 14.59 55.6
Deforest 1.52 5.8
East Crystal 52.77 201.0
1. Based on an annual ET loss of 45.7 inches/yr
Calculated Hydrologic Inputs for the East Crystal Chain-of-Lakes
Lake Source Annual Inflow
(ac-ft/yr) Percent of Total
(%)
East Crystal
Precipitation 396 65 Runoff 40.6 7
Overland Flow 140 23 Belair Inflow 7.2 1
Groundwater Seepage 24.5 4 Total: 608 100
Belair
Precipitation 101 50 Runoff 38.8 19
Overland Flow 44.4 22 Groundwater Seepage 16.2 9
Total: 201 100
Amory
Precipitation 37.5 44 Runoff 10.7 13
Overland Flow 31.2 37 Groundwater Seepage 5.5 6
Total: 84.8 100
Deforest
Precipitation 50.4 26 Runoff 47.0 24
Overland Flow 13.5 7 Groundwater Seepage 7.2 4
Belair Inflow 31.4 16 Amory Inflow 43.5 23
Total: 193 100
Summary of Mean Annual Hydrologic Inputs to East Crystal and Belair Lakes
Summary of Mean Annual Hydrologic Inputs to East Crystal and Belair Lakes
Calculated Hydrologic Losses for the East Crystal Chain-of-Lakes
Lake Source Annual Inflow
(ac-ft/yr) Percent of Total
(%)
East Crystal
Evaporation 387 64 Wetland Evapotranspiration 201 33
Deep Recharge 20.6 3 Total: 608 100
Belair
Evaporation 98.8 49 Wetland Evapotranspiration 55.6 28
Deep Recharge 7.5 4 Outflow to East Crystal Lake 7.2 3
Outflow to Deforest Lake 31.4 16 Total: 201 100
Amory
Evaporation 36.6 43 Wetland Evapotranspiration 0.9 1
Deep Recharge 3.9 5 Outflow to Deforest Lake 43.5 51
Total: 84.8 100
Deforest
Evaporation 49.2 26 Wetland Evapotranspiration 5.8 3
Deep Recharge 4.6 2 Outflow to Lockhart-Smith
Canal 133 69
Total: 193 100
Summary of Mean Annual Hydrologic Losses to East Crystal and Belair Lakes
Summary of Mean Annual Hydrologic Losses to Amory and Deforest Lakes
Calculated Mean Annual Residence Times in the East Crystal Chain-of-Lakes
Lake Lake
Volume1 (ac-ft)
Annual Inflow
(ac-ft/yr)
Mean Detention Time
(days)
East Crystal 308 608 185
Belair 95.7 201 174
Amory 17.7 84.9 76
Deforest 62.2 193 118
1. Lake volumes at elevation 39.0 ft (NGVD)
Conceptual Schematic of Evaluated Nutrient Inputs and Losses for the East Crystal Chain-of-Lakes East Crystal Chain-of-Lakes
Nutrient Budget Components
Δ Storage
BulkPrecipitation
Runoff/Baseflow
GroundwaterSeepage
Outflow to Downstream Waterbodies
Deep Groundwater
Sedimentation
Interconnected Lake Inflow
Figure 5-1
East Crystal Chain-of-Lakes Nutrient Budget Components
Estimated Mean Annual Loadings to the East Crystal Chain-of-Lakes from Bulk Precipitation
Parameter Mass Loadings (kg/yr)
East Crystal Lake
Belair Lake
Amory Lake
Deforest Lake
Total N 376 96.0 35.6 47.8
Total P 29.8 7.6 2.8 3.8
TSS 8,438 2,158 799 1,075
Locations of Inflow Monitoring Sites for the East Crystal Chain-of-Lakes
Brightview
Pinelake Dr.
W. Crystal Dr.(East)
Lakeview Dr.(East)
W. Crystal Dr.(West)
Lakeview Dr.(West)
Figure 5-2
Overview of the Brightview Drive Monitoring Site
MonitoringSite
Brightview Drive Basin Overview
Figure 5-3
Photograph of the Brightview Drive Monitoring Site
Brightview Drive Site
PondOutfall
DeforestLake
MonitoringSite
Figure 5-4
Overview of the Lakeview Drive, Pinelake Drive, and West Crystal Drive Monitoring Sites
Pinelake Dr.
Lakeview Dr.(East)
W. Crystal Dr.(East)
W. Crystal Dr.(West)
Lakeview Dr.(West)
Figure 5-5
EastCrystal
Lake
Overview of the Lakeview Drive-East Monitoring Site
Lake View Dr. (East) Site
MonitoringSite
a. Overview of drainage basin characteristics
Figure 5-6
b. Lake View Dr. (East) monitoring site
Lake View Dr. (East) Site
MonitoringSite
a. Overview of drainage basin characteristics
Figure 5-6
b. Lake View Dr. (East) monitoring site
Overview of drainage basin characteristics
Lakeview Drive-East monitoring site
Overview of the Lakeview Drive-West Monitoring Site
Lakeview Drive looking west
Lakeview Drive-West monitoring site
Lake View Dr. (West) Site
MonitoringSite
Figure 5-7
a. Lake View Dr. looking west
b. Lake View Dr. (West) monitoring site
Lake View Dr. (West) Site
MonitoringSite
Figure 5-7
a. Lake View Dr. looking west
b. Lake View Dr. (West) monitoring site
Overview of Drainage Patterns at the Pinelake Drive Monitoring Site
Pinelake Drive looking north
Pinelake Drive looking south toward monitoring site
a. Pinelake Dr. looking north
b. Pinelake Dr. looking south toward monitoring site
W. Crystal Dr.
PinelakeDrive Site
Figure 5-8
a. Pinelake Dr. looking north
b. Pinelake Dr. looking south toward monitoring site
W. Crystal Dr.
PinelakeDrive Site
Figure 5-8
Overview of the Pinelake Drive Monitoring Site
MonitoringSite
Pinelake Drive Site
Figure 5-9
Overview of the West Crystal Drive-East Monitoring Site
Drainage basin characteristics
Runoff monitoring site
W. Crystal Dr. (East) Site
MonitoringSite
Figure 5-10
a. Drainage basin characteristics
b. Runoff monitoring site
W. Crystal Dr. (East) Site
MonitoringSite
Figure 5-10
a. Drainage basin characteristics
b. Runoff monitoring site
Overview of the West Crystal Drive-West Monitoring Site
Drainage basin characteristics
Runoff monitoring site
a. Drainage basin characteristics
b. Runoff monitoring site
W. Crystal Dr. (West) Site
MonitoringSite
Figure 5-11
a. Drainage basin characteristics
b. Runoff monitoring site
W. Crystal Dr. (West) Site
MonitoringSite
Figure 5-11
Number of Samples Collected at Each Monitoring Site
Brightview(2)
Pinelake Dr.(3)
W. Crystal Dr. -East (2)
Lakeview Dr. -East (3)
W. Crystal Dr. -West (3)
Lakeview Dr. -West (2)
Figure 5-12
Number of Samples Collected at Each Monitoring Site
Parameter Units Site
Brightview Drive
Lakeview Drive-E
Lakeview Drive-W
Pinelake West Crystal
Drive-E West Crystal
Drive-W
pH s.u. 6.66 6.25 5.67 5.80 5.65 5.90
Alkalinity mg/l 53.8 38.4 5.8 13.2 7.4 12.2
Spec. Conductivity mmho/cm 194 274 25 38 22 40
NH3-N mg/l 136 212 52 94 68 65
NOx-N mg/l 24 43 96 133 123 104
Diss. Organic N mg/l 113 433 125 167 114 134
Particulate N mg/l 739 367 125 265 562 372
Total N mg/l 1,046 1,147 403 692 872 774
SRP mg/l 10 25 44 66 72 78
Diss. Organic P mg/l 4 10 9 5 8 10
Particulate P mg/l 113 57 18 73 114 42
Total P mg/l 133 106 72 150 194 180
Turbidity NTU 17.8 2.9 4.3 9.1 11.5 6.0
Color Pt-Co 23 75 20 30 29 37
TSS mg/l 22.0 16.9 10.0 25.3 76.6 36.3
Isopleths of Mean Total Nitrogen Values in
Groundwater Seepage Entering the East
Crystal Chain-of-Lakes from September 2010-
March 2012
800
1000
600
1200
1400
800
1400
800
1400
600
16001400
1800
600
1600
1000
1800
1400
600
800
1000
1200
600
1200
400
1200
1000
600
800
600
800
1800
400
800
1000
8001000
800
1000
1200
1000
1000800
12001600 1400
600 0 600 1,200 1,800 2,400300Feet
LegendSeepage Sites
Total N Contours
Total N (µg/l)High : 2000
Low : 300
Isopleths of Mean Total Phosphorus Values in Groundwater Seepage
Entering the East Crystal Chain-of-Lakes from September 2010-
March 2012
10
10
40
10
10
40
6050
6050
0
90
10
20
80
30
20
70
0
50
10
20
30
70
10
20
30
20
20
60
10
4030
600 0 600 1,200 1,800 2,400300Feet
LegendSeepage Sites
Total P Contours
Total P (µg/l)High : 100
Low : 0
Isopleths of Mean Nitrogen Influx from
Groundwater Seepage Entering the East
Crystal Chain-of-Lakes from September 2010-
March 2012
200
100
200
500
300
400
200
200
400600
500
200 200
400
300
400
800
200
500
900800
400
200
700
300
600
500
400300
700
900
500
600
200
400
800
1000
100
600
900
100
500
300200
600 0 600 1,200 1,800 2,400300Feet
LegendSeepage Sites
Total N Flux Contours
TN Flux (µg/m^2-day)High : 1100
Low : 0
Isopleths of Mean Phosphorus Influx from Groundwater Seepage
Entering the East Crystal Chain-of-Lakes from September 2010-
March 2012
25
1015 15
15
10
20
5
20
0
1015
20
10
15
20
0
10
10
25
40
3035
15
5
600 0 600 1,200 1,800 2,400300Feet
LegendSeepage Sites
Total P Flux Contours
TP Flux (µg/m^2-day)High : 50
Low : 0
- Large diameter core samples collected in each of the 4 lakes - Core samples incubated under aerobic and anoxic conditions - Samples collected periodically and analyzed for P
Internal P Recycling
Locations for Collection of Large Diameter
Sediment Core Samples in East Crystal Lake
Locations for Collection of Large Diameter
Sediment Core Samples in Belair, Amory, and
Deforest Lakes
Schematic of Sediment Incubation
Apparatus
Estimated Mean Annual Mass Loadings and Losses of Total Nitrogen, Total Phosphorus, and TSS to East Crystal Lake
Parameter Source Total N Total P TSS
kg/yr % kg/yr % kg/yr %
Inputs
Bulk Precipitation 376 14 29.8 37 8,438 81
Runoff 31.3 1 4.4 5 636 6
Overland Flow 84.1 3 11.3 14 1,317 13
Groundwater Seepage 29.1 1 0.5 1 0 0
Belair Inflow 7.1 < 1 0.1 < 1 22 < 1
Internal Recycling 2,188 81 34.7 43 0 0
Total: 2,715 100 80.8 100 10,413 100
Losses Sediments 2,715 100 80.8 100 10,413 100
Total: 2,715 100 80.8 100 10,413 100
Estimated Mean Annual Mass Loadings and Losses of Total Nitrogen, Total Phosphorus, and TSS to Belair Lake
Parameter Source Total N Total P TSS
kg/yr % kg/yr % kg/yr %
Inputs
Bulk Precipitation 96.0 15 7.6 15 2,158 50
Runoff 49.2 8 7.3 14 933 22
Overland Flow 57.0 9 7.3 14 1,205 28
Groundwater Seepage 15.7 2 0.4 1 0 0
Internal Recycling 425 66 28.9 56 0 0
Total: 643 100 51.5 100 4,296 50
Losses
Outflow to East Crystal 7.1 1 0.1 < 1 22 1
Outflow to Deforest 30.9 5 0.6 1 97 2
Sediments 605 94 50.8 99 4,177 97
Total: 643 100 51.5 100 4,296 100
Estimated Mean Annual Mass Loadings and Losses of Total Nitrogen, Total Phosphorus, and TSS to Amory Lake
Parameter Source Total N Total P TSS
kg/yr % kg/yr % kg/yr %
Inputs
Bulk Precipitation 35.6 8 2.8 6 799 19
Runoff 9.8 2 10.6 23 2,179 51
Overland Flow 28.7 7 6.2 13 1,263 30
Groundwater Seepage 7.7 2 0.2 < 1 0 0
Internal Recycling 359 81 27.0 58 0 0
Total: 440 100 46.9 100 4,242 100
Losses
Outflow to Deforest 71.0 12 2.1 4 104 2
Sediments 369 88 44.8 96 4,138 98
Total: 440 100 46.9 100 4,242 100
Estimated Mean Annual Mass Loadings and Losses of Total Nitrogen, Total Phosphorus, and TSS to Deforest Lake
Parameter Source Total N Total P TSS
kg/yr % kg/yr % kg/yr %
Inputs
Bulk Precipitation 47.8 13 3.8 10 1,075 41
Runoff 41.4 11 5.1 14 904 34
Overland Flow 12.5 4 2.1 6 437 17
Belair Inflow 30.9 8 0.6 2 97 4
Amory Inflow 71.0 20 2.1 6 104 4
Groundwater Seepage 15.2 4 0.6 2 0 0
Internal Recycling 148 40 22.0 60 0 0
Total: 367 100 36.3 100 2,617 100
Losses
Canal Outflow 140 38 4.1 11 481 18
Sediments 227 62 32.2 89 2,136 82
Total: 367 100 36.3 100 2,617 100
Comparison of Areal Nutrient Loadings to the East Crystal Chain-of-Lakes
Lake Area
(acres)
Mass Loading (kg/yr)
Areal Loading (g/m2-yr)
Total N Total P Total N Total P
East Crystal 92.8 2,715 80.8 7.2 0.22
Belair 23.73 643 51.5 6.7 0.54
Amory 8.79 440 46.9 12.4 1.32
Deforest 11.82 367 36.3 7.7 0.76
Permissible loading levels (Vollenweider, 1968) for lakes up to 15 m deep: 1. Phosphorus: a. Permissible: 0.2 g/m2-yr 2. Nitrogen: a. Permissible: 3.0 g/m2-yr
Summary of Mean Annual Percentages of Phosphorus Loadings to the East Crystal Chain-of-Lakes
Source
Percentage of Annual Total Phosphorus Loadings (%)
East Crystal Lake
Belair Lake
Amory Lake
Deforest Lake
Bulk Precipitation 37 15 6 11
Runoff 5 14 23 14
Overland Flow 14 14 13 6
Groundwater Seepage 1 1 < 1 2
Interconnected Lake Inflow < 1 -- -- 6
Internal Recycling 43 56 58 61
TOTAL: 100 100 100 100
Management Philosophy
The East Crystal Chain-of-Lakes are primarily P limited lakes and P loadings must be controlled to improve water quality Management of P loadings should emphasize significant inputs Smaller inputs should be managed as opportunities arise
Stormwater runoff contributions of Total P to the East Crystal Chain-of-Lakes: With the exception of Amory, runoff contributes a relatively small percentage of the annual TP loadings to the Chain Stormwater management projects would be most appropriate for Amory Stormwater management for the remaining lakes may be feasible if the cost is low
1. Stormwater Management
Lake Total P Load (kg/yr) Percent of Total
Loading (%) East Crystal 4.4 5
Belair 7.3 14 Amory 10.6 23
Deforest 5.1 14
Overview of Existing Stormwater Treatment
Systems and Right-of-Way in the East Crystal
Chain-of-Lakes Basin
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendBasinBoundaries
Lakes
Dry Pond
Wet Pond
StormwaterTreatment Areas
Dry Pond
Wet Pond
Dual Pond
Right of Way
µ
1,000 0 1,000 2,000 3,000500Feet
Typical Drainage Patterns on the East Side of the East Crystal Chain-of-Lakes
Roadway drainage conditions in the Amory Basin Roadway drainage conditions in the Amory Basin
Roadway drainage conditions in the East Crystal Basin Roadway drainage conditions in the East Crystal Basin
Roadway drainage conditions in the Amory basin Roadway drainage conditions in the Amory basin
Roadway drainage conditions in the East Crystal basin
Roadway drainage conditions in the East Crystal basin
Roadway drainage conditions in the Amory basin Roadway drainage conditions in the Amory basin
Roadway drainage conditions in the East Crystal basin
Roadway drainage conditions in the East Crystal basin
Overview of Right-of-Way Areas in the East Crystal
Chain-of-Lakes Basin with No Current
Drainage Systems
AmoryLake
DeforestLake
BelairLake
EastLake
Crystal
LegendBasin Boundaries
Lakes
Potential Swale RW1,000 0 1,000 2,000500
Feet
µ
Roadway Areas Without Stormwater
Conveyance Systems
Lake / Basin Street Name Roadway Length (ft)
Amory Crystal Drive 432 Amory – Total: 432
Belair
Caspian Court Crystal Drive Crystal View
41 830 280
Belair – Total: 1,152
Deforest
Crystal Drive Forrest Drive
Homewood Drive Lake Blvd.
Orange Drive Sunset Drive
Vinewood Drive
134 912 730 663 614
1,362 1,135
Deforest – Total: 5,550
East Crystal
First Street Second Street Abbott Avenue Alma Avenue
Country Club Road Crystal Drive Crystal View Floyd Avenue
Frederick Avenue Goodheart Avenue
Grand Bend Avenue Linda Lane
956 1,487 885
1,123 726 923
2,198 1,257 1,074 992 634
1,610 East Crystal – Total: 13,866
TOTAL: 21,000
Schematic of Proposed Swale
System for a 50-ft Right-of-Way Section
Estimated Construction Costs for Recommended Roadside Swale Systems in the East Crystal Chain-of-Lakes Basin
Lake
Length of Roadway
Without Swales (ft)
Assumed Construction
Cost ($/ft)
Total Construction
Cost ($)
Amory 432 15 6,480
Belair 1,152 15 17,280
Deforest 5,550 15 83,250
East Crystal 13,866 15 207,990
Total: 21,000 $ 315,000
Schematic of Proposed
Swale Blocks
Estimated Loadings of Total Phosphorus to the East Crystal Chain-of-Lakes from Direct Overland Flow
2. Direct Overland Flow
Lake Total P Load (kg/yr) Percent of Total
Loading (%)
East Crystal 11.3 14
Belair 7.3 14
Amory 6.2 13
Deforest 2.1 6
Schematic of Recommended Rear Yard Swale and Berm Design
Recommended Berm and Swale Section
Residentialbackyard
SHGT
Swale
Berm
Lake
Storage volume should meet WMD design criteria
Overflowto lake
2. Rear Yard Swales and Berms
Alternative Seawall Design Used as Rear Yard Berm
Overview of Parcels Which Could Be
Retrofitted with Berm and Swale Systems
AmoryLake
BelairLake
DeforestLake
EastCrystal
Lake
LegendBasin Boundaries
Lakes
Berm Length
Berm Parcels1,000 0 1,000 2,000500Feet
µ
Estimated Construction Costs for Berm and Swale Systems on Parcels Adjacent to the
East Crystal Chain-of-Lakes
Item East Crystal Lake Belair Lake
Amory Lake
Deforest Lake
Number of Parcels 110 21 33 20
Length 18,271 ft 3,561 ft 4,126 ft 2,804 ft
Construction Cost $ 20/ft $ 20/ft $ 20/ft $ 20/ft
Total Cost $ 365,420 $ 71,220 $ 82,520 $ 56,080 Percent of Total Shoreline
Treated 58% 48% 100% 98%
Estimated Phosphorus Removal Costs for the Proposed Berm and Swale Systems
Item East Crystal Lake Belair Lake
Amory Lake
Deforest Lake
20-year Present Worth Cost $ 365,420 $ 71,220 $ 82,520 $ 56,080
Phosphorus Removal
5.2 kg/yr
104 kg over 20 years
2.8 kg/yr
56 kg over 20 years
5.0 kg/yr
100 kg over 20 years
1.7 kg/yr
34 kg over 20 years
Phosphorus Removal Cost
($/kg TP removed) $ 3,514/kg $ 1,272/kg $ 825/kg $ 1,649/kg
3. Internal Recycling of Total P
Vertical Zonation in a Lake
Internal recycling contributes significant TP loadings to the Chain-of-Lakes
Control of internal recycling can be achieved by dredging or chemical inactivation using alum Dredging is generally prohibitively expensive
Internal Recycling
Lake Total P Load (kg/yr) Percent of Total
Loading (%)
East Crystal 34.7 43
Belair 28.9 56
Amory 27.0 58
Deforest 22.0 60
Typical Equipment Used for Alum Surface Applications
Summary of Mean Areal and Water Column Doses of Alum for Sediment Inactivation and Control of Groundwater
Seepage Inflows to the East Crystal Chain-of-Lakes
Item Units Belair Lake Amory Lake
Deforest Lake
Sediment Inactivation gallons alum 17,560 6,563 4,031
Seepage Control1 gallons alum 360 176 541
Total Alum Required gallons alum 17,920 6,739 4,572
Mean Areal Dose g Al/m2 41.4 42.0 21.2
Mean Water Column Dose mg Al/liter 34 68 13.2
Estimated Cost $ 51,000 33,000 29,000
1. Seepage contributes ~ 1-2% of the annual P loadings
4. Vegetated Shorelines A wide range of shoreline characteristics are present in the East Crystal Chain-of-Lakes: – Natural vegetated shoreline – Planted vegetation – Cleared and bare shorelines
Monitoring conducted by ERD has indicated that non-vegetated shorelines are susceptible to erosion and re-suspension of sediments, contributing to water quality degradation Shoreline vegetation provides many important functions, including: – Erosion control – Diverse habitats which can improve water quality
Overland flow from rear yards contributes a large portion of the runoff generated loadings to the lake
Dedicated Conservation Areas on the West Sides of Deforest and Belair Lakes
AmoryLake
DeforestLake
BelairLake
East LakeCrystal
East LakeCrystal
LegendBasin Boundaries
Lakes
Conservation Area 300 0 300 600150Feet
µ
Shoreline Conditions in Southern Portions of East Crystal Lake
BufferAreas
Shoreline Conditions in Northern Portions of East Crystal Lake
BufferAreas
BareShorelines
Shoreline Conditions in Northern Portions of Belair Lake
BufferAreas
BareShorelines
Shoreline Conditions in Southern Portions of Belair Lake
ConservationEasement
Figure 7-13
Shoreline Conditions in Amory Lake
BareShorelines
Shoreline Conditions on the West and South Sides of Amory Lake Figure 7-16
BareShorelines
Shoreline Conditions in Deforest Lake
ConservationEasement
BareShorelines
Figure 7-16
Examples of Desirable Vegetated Shorelines
Vegetated Shorelines – cont.
Current Seminole County code requires a permit before shoreline vegetation can be removed Regulations are outlined in Chapter 70 – Dredge and Filling of County Municipal Code However, several exemptions apply: – Non-mechanical removal of undesirable aquatic or shoreline
vegetation, provided that such removal does not affect the shoreline stability
– Clearing of vegetation to create an access area or beach less than 25 feet in width
Recommend that vegetation be established in all non- exempt areas over a 5 year period
5. Vegetation Management Vegetation control in the East Crystal Chain-of-Lakes has been conducted using mechanical, chemical, and biological means Vegetation management has been an on-going problem in Amory Lake – Lake has been stocked with grass carp on several occasions
However, too many fish will remove all vegetation which will cause changes in lake clarity and chemistry Lakes will convert from a macrophyte dominated system to an algae dominated system
– Chlorophyll-a will increase, clarity will decrease, and muck accumulation will increase
Lake Area (acres) Target Control
Stocking Rate (fish/acre)
4/15/85 270 Hydrilla 31
1/22/99 30 Hydrilla 3.4
Photographs of the Amory Lake Vegetation Removal
Project
Growth of dense vegetation in Amory Lake Mechanical removal equipment
Conditions following vegetation removal
Vegetation Management
6. Landscape Activities Improper landscape maintenance activities have a potential for significant impacts to adjacent waterbodies: – Blowing grass clippings, leaves and other vegetation onto roadways – Improper application of fertilizers/pesticides
Instances of improper landscaping activities were observed by ERD during this project
Discharge of grass clippings and other landscaping wastes onto roadway surfaces or into stormsewers is a senseless and irresponsible practice
Landscape Activities Recommendations
A strict ordinance should be developed which prohibits discharge of landscaping wastes onto paved surfaces and imposes fines – Repeat violations of this ordinance would result in loss of license
to perform landscaping in Seminole County
Seminole County in currently in the process of adopting a fertilizer ordinance that will address this issue
7. Public Education - Many homeowners are unaware of the relationship between their day to day
activities and water pollution - Educational programs can be effective in reducing Pointless Personal Pollution 1. Relationship between land use, runoff, and pollutants 2. Typical stormwater treatment systems 3. How to reduce stormwater runoff volume 4. Impacts of waterfowl and pets on runoff characteristics and surface water quality 5. Stormwater program goals and regulations 6. Responsible use of fertilizer, pesticides, and herbicides 7. Elimination of illicit connections to stormwater system 8. Controlling erosion and turbidity 9. Proper operation and maintenance of stormwater systems
- Educational materials can be distributed in utility bills or mass mailouts - Conduct educational seminars around the community
Recommended Management Options for East Crystal Lake
Issue Recommendation
Treatment of Stormwater Inputs
Construct swale drainage systems in areas without existing stormwater conveyance systems
Install swale blocks where possible to retain runoff in the watershed
Rear Yard Berms and Swales
Construct berms and swales along all developed shoreline areas of East Crystal Lake
Vegetated Shorelines Require establishment of natural shoreline vegetation in all non-exempt shoreline areas within 3-5 years
Lawn Maintenance Activities Enforce guidelines in new Fertilizer Rule
Public Education Continue the existing comprehensive public education program to inform residents of link between watershed activities and water quality
Vegetation Management
Manage growth of aquatic vegetation in the lake by removing exotic and nuisance vegetation on a periodic basis
Recommended Management Options for Belair Lake Issue Recommendation
Treatment of Stormwater Inputs
Construct swale drainage systems in areas without existing stormwater conveyance systems Install swale blocks where possible to retain runoff in the watershed
Rear Yard Berms and Swales Construct berms and swales along all developed shoreline areas
Vegetated Shorelines
Require establishment of natural shoreline vegetation in all non-exempt shoreline areas within 3-5 years
Re-establish the permitted conservation areas along the west shoreline, where missing
Internal Recycling/ Groundwater
Seepage Inputs
Conduct a whole-lake alum treatment to control internal recycling and remove phosphorus from seepage inflows
Lawn Maintenance Activities Enforce guidelines in new Fertilizer Rule
Public Education Continue the existing comprehensive public education program regarding link between watershed activities and water quality
Vegetation Management
Manage growth of aquatic vegetation in the lake by removing exotic and nuisance vegetation on a periodic basis
Recommended Management Options for Amory Lake
Issue Recommendation
Treatment of Stormwater Inputs
Construct swale drainage systems in areas without existing stormwater conveyance systems Install swale blocks where possible to retain runoff in the watershed
Rear Yard Berms and Swales
Construct berms and swales along all developed shoreline areas of Amory Lake
Vegetated Shorelines Require establishment of natural shoreline vegetation in all non-exempt shoreline areas within 3-5 years
Establish buffer area between golf course and lake Internal Recycling/
Groundwater Seepage Inputs
Conduct a whole-lake alum treatment to control internal recycling and remove phosphorus from seepage inflows
Lawn Maintenance Activities Enforce guidelines in new Fertilizer Rule
Public Education Continue the existing comprehensive public education program to inform residents of link between watershed activities and water quality
Vegetation Management
Manage growth of aquatic vegetation in the lake by removing exotic and nuisance vegetation on a periodic basis
Recommended Management Options for Deforest Lake Issue Recommendation
Treatment of Stormwater Inputs
Construct swale drainage systems in areas without existing stormwater conveyance systems Install swale blocks where possible to retain runoff in the watershed
Rear Yard Berms and Swales
Construct berms and swales along all developed shoreline areas of Deforest Lake
Vegetated Shorelines
Require establishment of natural shoreline vegetation in all non-exempt shoreline areas within 3-5 years Re-establish the permitted conservation areas along the west shoreline, where missing
Internal Recycling / Groundwater
Seepage Inputs
Conduct a whole-lake alum treatment to control internal recycling and remove phosphorus from seepage inflows
Lawn Maintenance Activities Enforce guidelines in new Fertilizer Rule
Vegetation Management
Manage growth of aquatic vegetation in the lake by removing exotic and nuisance vegetation on a periodic basis
Outfall Monitoring Conduct continuous monitoring of flow and water quality characteristics during outfall discharge events to quantify mass loadings to Lockhart-Smith Canal
Questions?
Summary of Available Historical Water Quality Data for the East Crystal Chain-of-Lakes
Lake Agency Station
I.D. Collection
Dates Monitoring Frequency
Number of
Events
Amory LAKEWATCH
Amory-1 Amory-2 Amory-3 Amory
6/05-11/08 6/05-11/08 6/05-3/10 6/07-1/10
2-11 events/year 2-11 events/year 2-11 events/year 1-3 events/year
23 23 38 7
Seminole County AMO 2/00-7/13 2-5 events/year 34 FDEP 27140 7/19/05 1 event 1
Belair LAKEWATCH Belair-1 Belair-2 Belair-3
2/00-11/05 2/00-11/05 2/00-11/05
Variable Variable Variable
6 6 6
Deforest LAKEWATCH
Deforest-1 Deforest-2 Deforest-3
10/96-1/03 10/96-1/03 10/96-1/03
Variable Variable Variable
9 9 9
Seminole County CL02 9/97-7/13 9/97-9/98: monthly 2/99-7/13: quarterly
67
East Crystal
LAKEWATCH EC-1 EC-2 EC-3
8/91-8/05 8/91-8/05 8/91-8/05
Mostly monthly Mostly monthly Mostly monthly
107 107 107
Seminole County CL03 9/97-7/13 9/97-9/98: monthly 2/99-7/13: quarterly
67
FDEP 20010240 3/07 1 event 1 Lockhart-Smith Canal Seminole County CL01 9/97-3/07 3 41
