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Flood Mitigation and Water Quality Iowa Department of Natural Resources.

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Presentation on theme: "Flood Mitigation and Water Quality Iowa Department of Natural Resources."— Presentation transcript:

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 Cover crops Nitrogen held in plants Permanent grass Keeps sediment and phosphorus in the field

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 Rain Gardens Bioswales Water evaporated through plants Nitrogen held in plants

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

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 CorellAllen BoniniBill Ehm Iowa Department of Natural Resources


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