Interactive engineering model
Gradually varied flow profile classifier
Compare the actual water surface with normal- and critical-depth references as channel slope and control depth change.
Preparing the 3D model...
A long trapezoidal channel carries a swept water solid between labelled normal- and critical-depth planes, with M, S, C, H, or A profile classification. The chosen control structure decides which end governs the profile, and depths are drawn at a stated vertical exaggeration.
Focus the 3D view and use the arrow keys to orbit, plus or minus to zoom, and Home to reset the view.
Text explanation and non-WebGL fallback
A long trapezoidal channel carries a swept water solid between labelled normal- and critical-depth planes, with M, S, C, H, or A profile classification. The chosen control structure decides which end governs the profile, and depths are drawn at a stated vertical exaggeration.
The numeric controls and readouts remain usable if WebGL is unavailable. Drag or swipe the 3D view to orbit and use a wheel or pinch gesture to zoom. With the 3D view focused, use the arrow keys to orbit, plus or minus to zoom, and Home to reset. The complete numeric lesson is also keyboard-accessible in the adjacent controls and readouts. This model is an educational aid and does not replace applicable design standards or professional review.