Interactive engineering model
French drain trench cutaway
Inspect a sloped perforated pipe carrying its solved flow depth inside an aggregate envelope, geotextile wrap, and saturated storage zone.
Preparing the 3D model...
A cutaway trench exposes the perforated pipe, its water surface, and the stone voids around it. The level in the stone follows the pipe water surface until the design flow exceeds full-pipe capacity, then rises on the surcharge the pipe cannot take away.
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 trench exposes the perforated pipe, its water surface, and the stone voids around it. The level in the stone follows the pipe water surface until the design flow exceeds full-pipe capacity, then rises on the surcharge the pipe cannot take away.
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.