Interactive engineering model
Partial-flow storm-drain cutaway
Move the water depth through a circular storm drain and compare partial-flow discharge and velocity with the full-pipe values.
Preparing the 3D model...
The cutaway highlights flow area and wetted perimeter and plots Q divided by Q-full against relative depth. Manning discharge reaches its maximum near 94 percent depth.
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
The cutaway highlights flow area and wetted perimeter and plots Q divided by Q-full against relative depth. Manning discharge reaches its maximum near 94 percent depth.
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.