Gradually Varied Flow (GVF) Profile

Compute backwater and drawdown profiles using the Direct Step Method for open channels.

📘 View Methodology Notes

Parameters

Δx = (E₂ - E₁) / (S_0 - S_f)

Discharge ($Q$ in m³/s)

Bed Width ($b$ in m)

Side Slope ($z$)

Manning's $n$

Bed Slope ($S_0$)

Upstream Control Depth ($y_1$ in m)

Target Downstream Depth ($y_2$ in m)

Step	Depth ($y$)	Energy ($E$)	$S_f$	Δx (m)