Channel Flow (Q) Calculator

Calculate the channel flow using Manning’s Equation:
\[ Q = \frac{1}{n}\,A\,R^{\frac{2}{3}}\,S^{\frac{1}{2}} \]

* Enter the cross-sectional area \(A\) (ft²), Manning’s roughness coefficient \(n\), hydraulic radius \(R\) (ft), and channel slope \(S\) (ft/ft).

Step 1: Enter Parameters

Cross-sectional Area, \( A \) (ft²):

Example: 50 ft²

Manning’s Roughness Coefficient, \( n \):

Example: 0.015

Hydraulic Radius, \( R \) (ft):

Example: 3 ft

Channel Slope, \( S \) (ft/ft):

Example: 0.01 ft/ft