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Flood Mitigation and Water Quality

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.

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Flood Mitigation and Water Quality

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  1. Flood Mitigation and Water Quality Iowa Department of Natural Resources

  2. Water Pollution in Iowa Sediment

  3. Water Pollution in Iowa Excess Nutrients Nitrogen & Phosphorus

  4. Water Pollution in Iowa Pathogens

  5. Let the Flood Plain be a Flood Plain • Nutrient rich soils settle out in the flood plain not in the stream Sunlight kills pathogens

  6. Let the Flood Plain be a Flood Plain • Reduce sediment loads from bank erosion

  7. Let the Flood Plain be a Flood Plain • Less Mess • Less Damage • Less Water Pollution

  8. Flood Mitigation in the Watershed Reduce: Flood Frequency Intensity

  9. Flood Mitigation in the Watershed Increase Retention Increase Infiltration • Reduce Pollution

  10. Retain Water in Watershed Storm Water Retention Basin Pond Sediment settles out Sunlight kills pathogens

  11. Retain Water in Watershed Wetlands • Sediment settles out Sunlight kills pathogens Plants capture nutrients

  12. Let The Water Soak In Terraces • Keeps sediment and phosphorus in the field

  13. Let The Water Soak In • Keeps sediment and phosphorus in the field Cover crops Nitrogen held in plants Permanent grass

  14. Let The Water Soak In Conservation Tillage Stream Buffers • Keeps sediment and phosphorus out of the stream • Nitrogen held in plants

  15. Let The Water Soak In Bioswales Rain Gardens • Water evaporated through plants • Nitrogen held in plants

  16. Let The Water Soak In Pervious Pavement Less pollution washes off pavement • Water evaporated through plants Green Roofs

  17. Conclusion • As we work to: • Reduce flood frequency & intensity • Reduce damages from flooding

  18. Conclusion • Hold more rain water in the watershed

  19. Conclusion • Let the flood plain be a flood plain

  20. Conclusion • Improve water quality

  21. Chuck Corell Allen Bonini Bill Ehm 515-281-4582 515-281-5107 515-281-4701 chuck.corell@dnr.iowa.gov allen.bonini@dnr.iowa.gov william.ehm@dnr.iowa.gov Iowa Department of Natural Resources

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