Interactive engineering model
Detention pond stage and outlet routing
Explore pedagogical basin geometry and outlet controls while a triangular inflow hydrograph fills and drains a cutaway pond.
Preparing the 3D model...
A cutaway trapezoidal detention basin holds a ponded water prism whose surface rises and falls with the routed stage, past a low circular orifice and a rectangular weir notch cut into the outlet control structure, with an emergency overflow at the maximum depth. Depth is drawn with an announced vertical exaggeration. These geometry controls teach stage-storage-discharge relationships and are not calculator-parity inputs.
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 cutaway trapezoidal detention basin holds a ponded water prism whose surface rises and falls with the routed stage, past a low circular orifice and a rectangular weir notch cut into the outlet control structure, with an emergency overflow at the maximum depth. Depth is drawn with an announced vertical exaggeration. These geometry controls teach stage-storage-discharge relationships and are not calculator-parity inputs.
Important: Pedagogical geometry controls — use the calculator and project-specific stage-storage-discharge data for design.
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.