Soils affect stormwater and stormwater management in two ways.
Soil erosion and sediment runoff to waterways are significant problems in Minnesota. According to the Minnesota Pollution Control Agency (MPCA 2016), approximately 30 percent of the state’s rivers and streams are impaired by sediment. Poorly managed construction sites can be substantial sediment sources to these surface waters. Up to 100 tons of sediment per acre can be lost annually from unmanaged construction sites (EPA 1999).
The Universal Soil Loss Equation (USLE) and it's update, the Revised Universal Soil Loss Equation (RUSLE) are used to predict sheet and rill erosion. Soil loss, typically expressed on an annual basis in tons per acre, is affected by rainfall characteristics, soil erodibility, slope length and gradient, soil cover, and erosion control practices. Soil erodibility is the intrinsic susceptibility of a soil to erosion by runoff and raindrop impact. In general, the following affect soil erodibility.
For more information on soil erodibility, link here.
Managing soil loss involves erosion protection and sediment control, with erosion protection being preferred.
Erosion protection practices