Water and Sediment Control Basins
The Iowa Watershed Approach
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What are water and sediment control basins?Water and sediment control basins (WASCOBs) are designed along minor slopes or watercourses. They detain precipitation runoff during storm events and slowly discharge this water through a stable outlet, which reduces streamflow by 5%. Sediment in the runoff is deposited in the basin, removing 80% of total suspended solids in runoff, reducing the phosphorus load by 85% and improving downstream water quality. These basins eliminate gully erosion and can also remove pollutants such as nitrogen, metals, bacteria and hydrocarbons. The dry basin between storm events maintains land function and farmability and vegetation along the basin edge provides wildlife habitat.
Benning, Jamie; Craft, Kristina; and Blume, Kurt, "Water and Sediment Control Basins" (2018). Extension and Outreach Publications. 440.
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