(appendix d is divided into 4 parts) part 4 · 2018. 4. 5. · appendix d . water quality program...
TRANSCRIPT
Appendix D
Water Quality Program
(Appendix D is divided into 4 parts)
Part 4 Long Lake, McDonald Lake, Lake Olson, Rest Area Pond, Silver Lake,
Sunfish Lake, Sunnybrook Lake (Lake graphs and map of survey results)
Part 1 2012 VBWD Water Quality Data Collection Program
(Narration, Tables D-1 through D-6, Figure D-1 [Avg. water clarity depths], and Figures D-2 and D-3 [Biotic Index Values])
Part 2
Bay Lake, Cloverdale Lake, Lake DeMontreville, Downs Lake, Eagle Point Lake, Echo Lake, Lake Edith
(Lake graphs and map of survey results)
Part 3
Lake Elmo, Goose Lake (North), Goose Lake (South), Horseshoe Lake, Lake Jane, Klawitter Pond, Kramer Pond
(Lake graphs and map of survey results)
Part 4 Long Lake, McDonald Lake, Lake Olson, Rest Area Pond, Silver Lake,
Sunfish Lake, Sunnybrook Lake
(Lake graphs and map of survey results)
LONG LAKESUMMER AVERAGE WATER CLARITY
Valley Branch Watershed District
0
2
4
6
8
10
12
14
16
18
0
1
2
3
4
5
6
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
LONG LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
LONG LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period – 2003 to 2012)
Confidence
Level Test Statistic = 16
Test Significance 99% 16 < 25 Not Significant 95% 16 < 20 Not Significant 90% 16 < 17 Not Significant 80% 16 > 14 Significant (Increasing)
Sen’s Slope 0.279 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
LONG LAKE
MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District
MC DONALD LAKESUMMER AVERAGE WATER CLARITY
Valley Branch Watershed District
0
1
2
3
4
5
6
7
8
9
0
1
2
3
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
MC DONALD LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
MC DONALD LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period – 2003 to 2012)
Confidence
Level Test Statistic = -8
Test Significance 99% -8 > -25 Not Significant 95% -8 > -20 Not Significant 90% -8 > -17 Not Significant 80% -8 > -14 Not Significant
Sen’s Slope -0.032 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
LAKE MCDONALD MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District
LAKE OLSONSUMMER AVERAGE WATER CLARITY
Valley Branch Watershed District
0
2
4
6
8
10
12
0
1
2
3
4
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
LAKE OLSON HISTORIC WATER QUALITY DATA Valley Branch Watershed District
LAKE OLSON
HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period = 2004 to 2012)
Confidence
Level Test Statistic = 3
Test Significance 99% 3 < 21 Not Significant 95% 3 < 17 Not Significant90% 3 < 15 Not Significant80% 3 < 12 Not Significant
Sen’s Slope 0.013 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
LAKE OLSON
MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District
REST AREA PONDSUMMER AVERAGE WATER CLARITY
Valley Branch Watershed District
0
1
2
3
4
5
6
7
8
9
0
1
2
3
1985
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
REST AREA POND HISTORIC WATER QUALITY DATA Valley Branch Watershed District
REST AREA POND HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period – 2003 to 2012)
Confidence
Level Test Statistic = -9
Test Significance 99% -9 > -21 Not Significant 95% -9 > -17 Not Significant 90% -9 > -15 Not Significant 80% -9 > -12 Not Significant
Sen’s Slope -0.039 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
REST AREA POND
MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District
SILVER LAKESUMMER AVERAGE WATER CLARITY
Valley Branch Watershed District
0
2
4
6
8
10
12
0
1
2
3
4
1970
1975
1980
1985
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
Significant Trend 2003-2012 -0.191 meters (-0.63 feet) / year
SILVER LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
SILVER LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period – 2003 to 2012)
Confidence
Level Test Statistic = -31
Test Significance 99% -31 < -30 Significant (Declining) 95% -31 < -23 Significant (Declining) 90% -31 < -20 Significant (Declining) 80% -31 < -16 Significant (Declining)
Sen’s Slope -0.191 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
SILVER LAKE
MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District
SUNFISH LAKESUMMER AVERAGE WATER CLARITY
Valley Branch Watershed District
0
1
2
3
4
5
6
7
8
9
0
1
2
3
1975
1980
1985
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
SUNFISH LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
SUNFISH LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period – 2005 to 2012)
Confidence
Level Test Statistic = 9
Test Significance 99% 9 < 18 Not Significant 95% 9 < 15 Not Significant 90% 9 < 13 Not Significant 80% 9 < 10 Not Significant
Sen’s Slope 0.01 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
SUNFISH LAKE
MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District
!?
!?
Typha sp.
Sagittaria sp.
Nymphaea odorata
Nymphaea odorata
Phragmites australis
Carex sp.
Sagittaria sp.
Sagittaria sp.
Schoenoplectus tabernaemontani
Schoenoplectus fluviatilis
Typha sp.
Chara sp. - 3+
Ceratophyllum demersum - 1
Stuckenia pectinatus - 1-3
Potamogeton zosteriformis - 1-2
Potamogeton crispus - 1
Potamogeton sp. - 2-3
Chara sp. - 2+
Potamogeton zosteriformis - 3+
Stuckenia pectinatus - 1-2
Ceratophyllum demersum - 1
Myriophyllum sibiricum - 1-2
Najas sp. - 1
Eriocaulon sp. - 1
Sagittaria sp. - 1-2
Stuckenia pectinatus - 1-3
Potamogeton zosteriformis - 3+
Ceratophyllum demersum - 1
Myriophyllum sibiricum - 1-2
Chara sp. - 2-3+
Potamogeton sp. - 2-3
Potamogeton crispus - 1-2
Elodea canadensis - 1
Potamogeton crispus - 1-2
Chara sp. - 1-2
Ceratophyllum demersum - 1
Stuckenia pectinatus - 1
Potamogeton zosteriformis - 2-3+
Myriophyllum sibiricum - 1-3
Potamogeton sp. - 2-3
Potamogeton crispus - 1
Chara sp. - 3+
Stuckenia pectinatus - 2-3
Potamogeton zosteriformis - 2-3
Myriophyllum sibiricum - 1
Potamogeton sp. - 2-3
Potamogeton zosteriformis - 3+
Potamogeton crispus - 2-3+
Elodea canadensis - 1
Potamogeton sp. - 3+
Potamogeton
zosteriformis - 3
Typha sp.
Scirpus sp.
South Basin
North Basin
Water QualityMonitoring Location
Typha sp.
Chara sp. - 2-3+
Schoenoplectus tabernaemontani
Schoenoplectus
tabernaemontani
Typha sp.
Potamogeton crispus - 1-2
Schoenoplectus tabernaemontani
Potamogeton crispus - 1-2Chara sp. - 3+
Potamogeton zosteriformis - 2-3
Water QualityMonitoring Location
Potamogeton crispus - 1-3
Elodea canadensis - 1
Chara sp. - 3+
Potamogeton zosteriformis - 2-3
Potamogeton sp. - 1-2
Scirpus sp.
Nymphaea odorata
Ranunculus
longirostris - 1
Phragmites australis
Potamogeton crispus - 2-3+
Elodea canadensis
Scirpus sp.
Potamogeton crispus - 1-3
Potamogeton crispus - 2-3
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Imagery Source: 2009 AE
SUNFISH LAKE MACROPHYTESURVEY RESULTS
June 4, 2012Valley Branch Watershed District
FIELD NOTES:- Macrophyte densities estimated as follows: 1=light; 2=moderate; 3=heavy- Densities generally not noted for emergent and floating leaf plants- No macrophytes found in water >6-7’ - Sporadic areas of Sagitarria sp. growing around entire lake perimeter. Dense in small areas.- Northwest lobe dry. No aquatic vegetation.- Most growth observed in 0-4’ depth- High water level
Emergent Plants
Floating Leaf Plants
Submerged Aquatic Plants
No Aquatic Vegetation
!? Water Quality Monitoring Location
Ke
vin
Av
e
Hwy 5
!;N
0 200 400
Meters
0 500 1,000
Feet
*Note: Bold red name indicates extremely aggressive/invasive introduced species.
Common Name Scientific Name
Canada w aterw eed Elodea canadensis
Coontail Ceratophyllum demersum
Curlyleaf pondweed Potamogeton crispus
Flatstem pondw eed Potamogeton zosteriformis
Muskgrass Chara sp.
Northern w atermilfoil Myriophyllum sibiricum
Pipew ort Eriocaulon sp.
Pondw eed Potamogeton sp.
Sago pondw eed Stuckenia pectinatus
Slender naiad Najas sp.
White w ater crow foot Ranunculus longirostris
Common Name Scientific Name
White w aterlily Nymphaea tuberosa
Common Name Scientific Name
Sedge Carex sp.
Giant reed grass Phragmites australis
Water knotw eed Polygonum amphibium
Arrow head Sagittaria sp.
River bulrush Schoenoplectus fluviatilis
Softstem bulrush Schoenoplectus tabernaemontani
Cattail Typha sp.
Bulrush Scirpus sp.
Submerged Aquatic Plants
Floating Leaf Plants
Emergent Plants
SUNNYBROOK LAKESUMMER AVERAGE WATER CLARITY AND TREND
Valley Branch Watershed District
0
1
2
3
4
5
6
7
8
9
0
1
2
3
1985
1990
1995
2000
2005
2010
2015
Secc
hi D
isc
Tran
spar
ency
Dep
th (f
eet)
Secc
hi D
isc
Tran
spar
ency
Dep
th (m
eter
s)
Year
POOR
EXCELLENT
FAIR
GOOD
SUNNYBROOK LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
SUNNYBROOK LAKE HISTORIC WATER QUALITY DATA Valley Branch Watershed District
Mann-Kendall/Sen’s Slope Trend Test (Test Period – 2003 to 2012)
Confidence
Level Test Statistic = 22
Test Significance 99% 22 < 30 Not Significant 95% 22 < 23 Not Significant 90% 22 > 20 Significant (Increasing) 80% 22 > 16 Significant (Increasing)
Sen’s Slope 0.057 meters/year
Notes: 1. Points shown in the graph are the summer average (June-August) Secchi disc transparency depths. Only years with a calculated summer average based on at least 4 measured values are plotted. At least 5 data points were required to complete the trend test.
SUNNYBROOK LAKE
MANN-KENDALL TREND ANALYSIS OF SECCHI DISC TRANSPARENCY Valley Branch Watershed District