WATERSHEDS Concepts and Curriculum Review LAKE MONITORING AND ANALYSIS Tony Thorpe and Dan Obrecht Lakes of Missouri Volunteer Program – Univ. of Missouri.

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Presentation transcript:

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

Most Common Pollutants Nutrients (phosphorus and nitrogen) Metals (mercury) Suspended Sediment (soil materials)

Leading Sources Agriculture Municipal Point Sources Urban Runoff

NRCS photo

Leading Sources Agriculture Municipal Point Sources Urban Runoff

Photo vault

Leading Sources Agriculture Municipal Point Sources Urban Runoff

NRCS photo

Lake Ecology Nutrients phosphorus and nitrogen

Other sources of nutrients Fertilizers from yards, golf courses, etc. Seepage from failing septic systems Pet waste Erosion

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

Lake Ecology Suspended Sediment

NRCS photo

Other sources of suspended sediments Erosion from construction sites Gully and stream erosion Shoreline erosion

Impacts of suspended sediment Reduced aesthetics Fill in lake bottom Reduce substrate habitat Increased treatment cost Reduced water clarity

Secchi Disk

Human activity in watershed Nutrients Sediment Algae Reduced water clarity Decreased water quality

Trends and Variability

Glacial Plains Osage Plains Ozark Border Ozark Highlands Mississippi Lowlands

Average values for physiographic region Region Sediment Phosphorus (mg/L) (ug/L) Glacial Plains Osage Plains Ozark Border Ozark Highlands

Missouri Lakes Row Crop vs Phosphorus

Missouri Lakes Forest vs Phosphorus

Longview Lake – Seasonal Pattern

LAKES OF MISSOURI VOLUNTEER PROGRAM

Program Goals Determine current water quality of Missouri lakes. Monitor for changes over time. Educate the public about water quality and lake ecology.

Parameters Monitored Secchi Transparency Phosphorus and Nitrogen Algal Chlorophyll Suspended Sediments

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.