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Flood Mitigation and Water Quality Iowa Department of Natural Resources
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Water Pollution in Iowa Sediment
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Water Pollution in Iowa Excess Nutrients Nitrogen & Phosphorus
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Water Pollution in Iowa Pathogens
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Let the Flood Plain be a Flood Plain Nutrient rich soils settle out in the flood plain not in the stream Sunlight kills pathogens
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Let the Flood Plain be a Flood Plain Reduce sediment loads from bank erosion
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Let the Flood Plain be a Flood Plain Less Mess Less Damage Less Water Pollution
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Flood Mitigation in the Watershed Reduce: Flood Frequency Intensity
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Flood Mitigation in the Watershed Increase Retention Increase Infiltration Reduce Pollution
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Retain Water in Watershed Storm Water Retention Basin Pond Sediment settles out Sunlight kills pathogens
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Retain Water in Watershed Wetlands Sediment settles out Sunlight kills pathogens Plants capture nutrients
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Let The Water Soak In Terraces Keeps sediment and phosphorus in the field
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Let The Water Soak In Cover crops Nitrogen held in plants Permanent grass Keeps sediment and phosphorus in the field
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Let The Water Soak In Conservation Tillage Stream Buffers Keeps sediment and phosphorus out of the stream Nitrogen held in plants
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Let The Water Soak In Rain Gardens Bioswales Water evaporated through plants Nitrogen held in plants
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Let The Water Soak In Pervious Pavement Less pollution washes off pavement Green Roofs Water evaporated through plants
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Conclusion As we work to: Reduce flood frequency & intensity Reduce damages from flooding
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Conclusion Hold more rain water in the watershed
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Conclusion Let the flood plain be a flood plain
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Conclusion Improve water quality
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Chuck CorellAllen BoniniBill Ehm 515-281-4582515-281-5107515-281-4701 chuck.corell@dnr.iowa.govallen.bonini@dnr.iowa.govwilliam.ehm@dnr.iowa.gov Iowa Department of Natural Resources
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