Green Weeds, Brown Water
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Transcript of Green Weeds, Brown Water
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Green Weeds, Brown Green Weeds, Brown WaterWaterNutrient Loading into Nutrient Loading into
Michigan’s Inland Lakes and Michigan’s Inland Lakes and StreamsStreams
Melanie StoughtonWater Quality TechnicianSt. Joseph Conservation District
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•More than 11,000 lakes and ponds• 3,288 miles of Great Lakes Coastline •36,000 miles of rivers
and streams•12,000 miles of cold- water trout streams
Inland lakes and streams are the first indicators of water quality problems in a watershed
Michigan has…..
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Green Weeds
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Brown Water
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Lake ZonesLake Zones
PROFUNDAL ZONE
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Lake Trophic StatusLake Trophic Status
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Water Quality Changes in Lakes
Nutrient Concentration (Phosphorus ug/l)
Wat
er Q
ualit
yPo
orH
igh Oligotrophic - High Quality
Mesotrophic - Medium Quality
Eutrophic - Poor Quality
10 20 30 40 50 60 70 80
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What Causes Nutrient What Causes Nutrient Overload?Overload?
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What Does This Do To What Does This Do To Our Lakes and Streams?Our Lakes and Streams?
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Invasive SpeciesInvasive Species
Purple Loosestrife
Eurasian Watermilfoil Frogbit
Hydrilla
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How Can Nutrients Be How Can Nutrients Be Reduced?Reduced?
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BuffeBuffer r
ZoneZoness NO fertilizer, NO fertilizer,
pesticides or pesticides or compost pilescompost piles
Prevent runoff Prevent runoff and erosion and erosion along streams, along streams, lakes and lakes and storm drainsstorm drains
Native plants Native plants anchor soilanchor soil
10 foot buffer strip if little or no slope
20 feet for Medium Slope
30 feet for steep banks
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Best Management Best Management PracticesPractices
Lawn Mowing Lawn Mowing TipsTips Taller is better Taller is better
(3”)(3”) MulchMulch
Lawn IrrigationLawn Irrigation Light and oftenLight and often No Runoff!No Runoff!
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Best Management Best Management PracticesPractices
Lawn Fertilizer Lawn Fertilizer TipsTips 5-10 foot buffer 5-10 foot buffer
strip with no strip with no fertilizer and fertilizer and extra high cutextra high cut
No phosphorus No phosphorus fertilizerfertilizer
Appropriate Appropriate NitrogenNitrogen
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Roots are Roots are Stronger than Stronger than
Stone, andStone, andStone is Stone is StrongerStronger
than Steelthan Steel
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Buffer Zone
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Image courtesy of MN Dept. of Ag.
Remember, when you're fertilizing the lawn, you MAY NOT just be fertilizing the lawn!
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Questions?