INTERACTIVE TEACHING WORKSPACE
What changes when you add a pond?
Draw a catchment. Run the storm. Use the evidence to defend your design.
01 / STUDY AREA
Build your drainage scenario
Surface flooding at the pondBlue halo = flooding alert. Flood extent, depth and ground pathway are not modelled.
Peterborough · prepared exampleReplace either outline by drawing a new polygon.
Maximum depth (m)
0.02–0.10
0.10–0.20
0.20–0.40
0.40–0.60
0.60–1.00
≥1.00
Peaks at different times · 5 mCatchmentPond◎ Comparison outletFlooding alert
Use the classroom example or import a project for a keyboard-accessible alternative to map drawing.
AFTER THE POND FILLS
2-D · 5 mWhere does the excess water go?
Route surface flooding over real terrain. Explore a hypothetical pond on a prepared Peterborough domain.
Street example: Hope Close / Aldermans Drive, Peterborough. Assumed pond and storm on real terrain.
Prepared 1 km terrain domain · real LiDAR and OSM features · assumed pond and release point
Release location: place it just outside the pond, inside the terrain domain.
Start with Load overflow example, or run your own pond and load the terrain.
Maximum surface depth—
Injected from SWMM—
Still on terrain at end—
Left terrain boundary—
One-way teaching model. No sewer capture, return flow to pond or observed-flow validation.
02 / MODEL EVIDENCE
Compare the hydrographs
The same storm. The same catchment. One pond to test.
Your first hydrograph starts hereUse the prepared catchment or draw your own,
then select Run without pond.
then select Run without pond.
Ready to explore. The example geometry is loaded; results are calculated when you run it.
Peak discharge— % lowerCompare both scenarios
Peak timing— minChange in peak time
Peak pond depth— mCheck against capacity
Peak storage— m³Storage used during the storm
Water balance checked
| Evidence | Without pond | With pond |
|---|
EPA SWMM 5.2.2 · 1-minute report interval
PREDICT · TEST · EXPLAIN
Would you keep this design?
Change one pond parameter. Compare the peak, timing, storage and overflow. Explain your decision using the evidence.