Storm Water Drain Design

Calculate hydrological runoff and hydraulic channel capacity per CPHEEO and IRC SP 42.

Catchment & Runoff

Rainfall Int. i (mm/hr)

Manning's Roughness (n)

Shape

Rectangular Trapezoidal

Base Width (m)

Design Depth (m)

Bed Slope (m/m)

Hydraulic Length L (m)

Elevation Fall ΔH (m)

Future Growth (1.x)

Return Pd Mod. (1.x)

Maint. Penalty (0.x)

Enter the area-weighted catchment data, Kirpich topography, and channel geometry to simulate storm capacity and velocity limits.