GROTON
08/02/2012

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Lake and Watershed

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Assessment Report Card



Total Phosphorus FAIR
Total Nitrogen FAIR
Chlorophyll-a GOOD
Alkalinity FAIR
Dissolved Oxygen FAIR
Lakeshore Disturbance FAIR
Lakeshore Habitat POOR
Shallow Water Habitat GOOD
Physical Complexity of Habitat FAIR
Watershed Minimally Disturbed

For more information about how lakes are scored, see:
Gauging the health of Vermont Lakes: Results of the 2007 National Lake Assessment


Water Quality

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Click here to view additional profiles for GROTON | Click here to view Lake Score Card for GROTON

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NOTE: Hover mouse over chart elements to to view data values

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Condition Assessments

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Total Phosphorus: FAIR

Total Nitrogen: FAIR

Chlorophyll-a: GOOD

Alkalinity: FAIR

Dissolved Oxygen: FAIR

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Secchi Transparency

Temperature, Dissolved Oxygen, Chlorophyll-a

Total Phosphorus

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Total Nitrogen

Conductivity

Chloride

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pH

Calcium and Magnesium

Iron, Manganese and Aluminum

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Dissolved Organic Carbon

intentionally blank

intentionally blank


Habitat

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Habitat Map

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Assessments

Assessments based on habitat indexes developed by EPA’s National Lake Assessment program.

Habitat Comparisons

Comparison of the average habitat characteristics of sites around GROTON with the average habitat characteritics at undeveloped and developed sites at other lakes in the state.

Disturbances

Disturbance components that make up the Lakeshore Disturbance score. ‘1.0’ indicates disturbance occurs in the immediate shoreline plot. ‘0.5’ indicates the disturbance occurs in an area proximal to, but not within, the immediate shoreline plot.

Human Disturbance
Station Buildings Park Commercial Docks Crops Pasture Orchard Lawn Walls Landfill Roads Powerlines
A 1 1 0 0 0 0 0 1 1 0 0.0 0.0
B 1 0 0 0 0 0 0 1 0 0 0.5 0.5
C 0 0 0 1 0 0 0 1 0 0 0.0 0.0
D 0 0 0 0 0 0 0 0 0 0 0.0 0.0
E 0 0 0 0 0 0 0 0 0 0 0.0 0.0
F 0 0 0 0 0 0 0 0 0 0 0.0 0.0
G 1 0 0 1 0 0 0 1 1 0 0.5 0.5
H 1 0 0 1 0 0 0 1 1 0 0.0 0.0
I 1 0 0 1 0 0 0 1 0 0 0.0 0.0
J 0 1 0 1 0 0 0 1 0 0 0.0 0.0


Inlets

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Inlets Map

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Water Quality

Comments: Inlet 1: N. end of lake, boulders& swim area so not measured sediment depth. Inlet 2: W. side of lake. Inlet 3: NE end of lake. Inlet 4: Right by site B.

Analytical Data
InletNo TP
(ug/L) 		TN
(mg/L) 		TCl
(mg/L)
Hydrolab Data
InletNo Conductivity
uS/cm 		Turbidity
NTU 		Temp
C 		DO
mg/L 		DO
% 		pH
 Chla
(ug/L)

Physical | Macrophytes

Sediment and Algae
InletNo Sediment Depth
(cm) 		Sediment Delta
(sq meters) 		Algae
%Cover
1 NA 0 0
2 10 0 0
3 15 200 0
4 20 400 1
5 0 0 0
6 10 0 0
7 NA 0 0
8 30 200 0
9 25 0 0
Aquatic Plants
InletNo Plants %Cover Dominant
Plant 1 		Dominant
Plant 2 		Dominant
Plant 3
1 50 Nymphaea sp. NA NA
2 5 Nymphaea sp. NA NA
3 1 Nymphaea sp. NA NA
4 0 NA NA NA
5 1 Pontederia sp. NA NA
6 80 Dulichium arundinaceum Pontederia sp. Nuphar variegata
7 100 Pontederia sp. Nuphar sp. Nymphaea sp.
8 20 Pontederia sp. Nuphar sp. NA
9 70 Vallisneria americana Potamogeton epihydrus var. epihydrus Nuphar sp.

Outlet

Characteristic Comment
Type NATURAL
Flow NA
Control Height (m) 1.5
Comments There is a road to the outlet & lots of ledges down stream w/ paths to them - outlet stream is very scenic.


Protection Classification

GROTON Lake Protection Classification

Comments: NA

Category Score Feature Present
Wilderness Score 0 Beach 0
Wilderness-Like Score 0 Ledge 0
Bouldered Shore 0
Vegetation 0
Islands 0
Steep Slopes 0
Peaks 0
Scenic Bottom 0
Cliffs 0
# Total Features 0


Data

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Chemistry

Lakeshore and Littoral Habitat

Inlet Habitat