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Protecting Water Quality: Best Management Practices · Protecting Water Quality: Best Management...
Transcript of Protecting Water Quality: Best Management Practices · Protecting Water Quality: Best Management...
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Protecting Water Quality:
Best Management Practices
Sarah SmithUNH Cooperative [email protected]‐862‐2647
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Water
• Streams• Rivers
• Lakes• Ponds• Wetlands
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BMPs• Simple, practical, cost‐effective steps• Designed to prevent or reduce non‐point source pollution
• Protect landowner’s investment
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Why Bother?
Using fish as an example
BiologicalChemicalPhysical
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When we think about BMPs we think in terms of:
•Goals•Costs•Planning•Construction•Maintenance
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Recreational Access is also a NH Tradition
HikingCross Country Skiing
Snowmobiling
Mountain BikingUniversal Access
Equestrian
Dog SleddingATVs
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BMPs for Timber Harvesting
• BMPs minimize the risk of sediment and other pollutants getting into waterbodies
• BMPs maintain the natural flow of water in streams and wetlands
• BMPs protect shoreland vegetation
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Planning• Determine area and property boundaries• Identify critical areas• Identify where you want to place BMPs• Lay out BMPs on the ground• Choose BMPs that are appropriate• Decide on maintenance plan ahead of time
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Construction
• Who is responsible• Legal requirements• Temporary or Permanent• Size and scale• Costs• Installation • Maintenance
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Water Bar
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Broad‐base Dip
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Hay Bales
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Silt Fence
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Diversion Ditches
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Culverts
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Culverts
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Open‐topped Box Culvert
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GeoTextile
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Bridge Construction
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?
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BMP Evaluation
• NH 2005 evaluation of BMP effectiveness demonstrated that BMPs are being used effectively, with soil stability:
• 77% of the time at crossings• 80% at approaches outside 50’ buffer• 76% at approaches inside the buffer• Installation and maintenance were the most common problems
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APPROACH A-OUTSIDE THE BUFFER
APPROACH A-INSIDE THE
BUFFERSTREAM CHANNEL
APPROACH B-INSIDE THE BUFFER
CROSSING STRUCTURE
APPROACHB-OUTSIDE THE BUFFER
STREAM CHANNEL
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Keep sediment out of streams!
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Protecting Water Quality:
Best Management Practices
Sarah SmithUNH Cooperative [email protected]‐862‐2647