watersheds concepts and curriculum review
DESCRIPTION
WATERSHEDS Concepts and Curriculum Review. LAKE MONITORING AND ANALYSIS Tony Thorpe and Dan Obrecht Lakes of Missouri Volunteer Program – Univ. of Missouri. Talk Topics. Pollutants and Sources Lake Ecology Trends and Variability Lakes of Missouri Volunteer Program. Pollutants and Sources. - PowerPoint PPT PresentationTRANSCRIPT
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WATERSHEDS Concepts and Curriculum
Review
LAKE MONITORING AND ANALYSISTony Thorpe and Dan Obrecht
Lakes of Missouri Volunteer Program – Univ. of Missouri
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Talk Topics
• Pollutants and Sources• Lake Ecology• Trends and Variability• Lakes of Missouri Volunteer Program
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Pollutants and Sources
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Most Common Pollutants
• Nutrients (phosphorus and nitrogen)
• Metals (mercury)
• Suspended Sediment (soil materials)
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Leading Sources
• Agriculture• Municipal Point Sources• Urban Runoff
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NRCS photo
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NRCS photo
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NRCS photo
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Leading Sources
• Agriculture• Municipal Point Sources• Urban Runoff
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Photo vault
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Leading Sources
• Agriculture• Municipal Point Sources• Urban Runoff
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NRCS photo
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Lake Ecology
Nutrients phosphorus and nitrogen
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101 1023 4 5 6 7 8 2 3 4 5 6 7 8 2 3 4 5
Phosphorus (ug/L)
100
101
102
6
23457
23457
2345
Alg
al B
iom
ass
(Chl
ug/
L)
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10-1.0 100.02 3 4 5 6 7 8 2 3
Nitrogen (mg/L)
100
101
102
6
23457
23457
2345
Alg
al B
iom
ass
(Chl
ug/
L)
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Other sources of nutrients
• Fertilizers from yards, golf courses, etc.• Seepage from failing septic systems• Pet waste• Erosion
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Impacts of Excessive Algae
• Reduced aesthetics• Decreased recreational value• Increased treatment cost• Taste and odor problems• Impacts of dissolved oxygen in lake• Reduced water clarity
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Lake Ecology
Suspended Sediment
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NRCS photo
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Other sources of suspended sediments
• Erosion from construction sites• Gully and stream erosion• Shoreline erosion
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Impacts of suspended sediment
• Reduced aesthetics• Fill in lake bottom• Reduce substrate habitat• Increased treatment cost• Reduced water clarity
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Secchi Disk
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10-1.0 100.0 101.02 3 4 5 6 7 2 3 4 5 6 7 2 3 4 5
Suspended Solids (mg/L)
10-1.0
100.0
2
3
45678
2
3
456
Secc
hi (m
eter
s)
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100 101 10267 2 3 4 5 67 2 3 4 5 67 2 3 4 5
Algal Biomass (Chl ug/L)
10-1.0
100.0
2
345678
2
3456
Secc
hi (m
eter
s)
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Human activity in watershed
Nutrients Sediment
Algae
Reduced water clarity
Decreased water quality
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Trends and Variability
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Glacial Plains
Osage Plains
Ozark Border
Ozark Highlands Mississippi Lowlands
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Average values for physiographic region
Region Sediment Phosphorus (mg/L) (ug/L)
Glacial Plains 6.8 44 Osage Plains 16.5 73 Ozark Border 4.5 40 Ozark Highlands 2.1 17
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7
20
55
148
Tota
l Pho
spho
rus
(g/
L)
Medium
Amount of Row Crop in the Watershed
Low High
Missouri Lakes
Row Crop vs Phosphorus
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7
20
55
148
Tota
l Pho
spho
rus
(g/
L)
Medium
Amount of Forest in the Watershed
Low High
Missouri Lakes
Forest vs Phosphorus
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100
300
500
700
900
1100
Tota
l Nitr
ogen
(
g/L)
Phos
phor
us a
nd
Chl
orop
hyll
(
g/L)
PhosphorusChlorophyllNitrogen
0
20
40
60
JuneMay July August September
Longview Lake – Seasonal Pattern
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LAKES OF MISSOURI VOLUNTEER PROGRAM
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Program Goals
Determine current water quality of Missouri lakes.
Monitor for changes over time.
Educate the public about water quality and lake ecology.
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Parameters Monitored
• Secchi Transparency• Phosphorus and Nitrogen• Algal Chlorophyll• Suspended Sediments
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How the Program Works
• Volunteers are provided with equipment and training
• They collect 8 samples between April and September.
• Process samples at home.• LMVP staff pick-up frozen samples and
analyze at University.• Data are given to MoDNR and used to
produce annual report.