3 backwater

River Flow Velocity & Backwater Profile Calculator

This expert-grade tool evaluates river flow velocity under backwater effects using Manning’s Equation, Continuity Equation, and GVF profile analysis. Comparison with HEC-RAS expected behavior is also provided.

Channel Type: Rectangular Trapezoidal Channel Bottom Width (b) in m: Side Slope (z:H:1V) [for trapezoidal channel]: Initial Flow Depth before Dam (m): Backwater Depth near Dam (m): Channel Bed Slope (S₀): Backwater Energy Slope near Dam (S_f): Manning's Roughness Coefficient (n):