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