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CWRE Ditch Capacity Calculator (Manning Formula) - Borst Engineering & Construction LLC
Top Width (Feet)
Bottom Width (Feet)
Depth (Feet)
Fall (Feet)
Length (Feet)
Manning Roughness Coefficient (0.015 for concrete/steel)
Gradient (%)
Area of Cross-Section (SF)
Wetted Perimeter (Feet)
Hydraulic Radius (Feet)
Maximum Velocity (FPS)
Ditch Capacity (CFS, GPM=448.8 x CFS)
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