Maximum runoff velocity (feet per second) for a berm based on soil type. These values reflect the maximum velocity of runoff that should be intercepted by a berm before erosion is likely to occur.
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Soil Type | Permissible Velocity (fps) | |||
---|---|---|---|---|
Channel Vegetation | ||||
Bare | Poor | Fair | Good | |
Sand, silt, sandy loam, and silty, loam | 1.5 | 1.5 | 2.0 | 3.0 |
Sandy clay, lam, and sandy clay, loam | 2.0 | 2.5 | 3.0 | 4.0 |
Clay | 2.5 | 3.0 | 4.0 | 5.0 |