An urban runoff inlet feeds a landscaped detention basin. A low orifice throttles the ordinary release; a higher emergency crest carries overflow. Watch the pond level, outlet jets and cumulative water balance during a runoff pulse.
• 3D scene parts: Street and storm inlet; landscaped storage basin; low-level outlet; emergency overflow crest; runoff and release recorder. • Controls: Basin plan area (300–3000 m²); Runoff pulse peak (0.5–8 m³/s); Pulse duration (300–1500 hydraulic s); Low outlet diameter (0.1–0.6 m); Emergency crest depth (0.5–2.5 m); Hydraulic time / playback second (10–120 ×). • Live readouts: Pond depth (m); Runoff entering (m³/s); Low outlet flow (m³/s); Emergency overflow (m³/s); Stored runoff (m³); Volume balance error (m³). • Guided experiments: Small outlet; Large basin; Low emergency crest. • Four tabs (visual laboratory, curves and measurements, experiments, learn and assess), a model-verification run, a timestamped event log and a trial report.
S=A h; dS/dt=I−Qorifice−Qoverflow Qorifice=0.62(πD²/4)√(2gh) Qoverflow=1.7×2 max(h−crest,0)^(3/2) Inflow is a triangular prescribed runoff pulse
Constant-area level-pool basin with free-discharge orifice and ideal emergency crest. No downstream submergence, infiltration, pollutant treatment, sediment accumulation or rainfall-runoff solver. Hydraulic clock is accelerated; dry storage limits withdrawals without creating negative volume. Try the preset experiments, then compare the live readouts with the equations.
Yes. Both releases are integrated.
No. The runoff hydrograph is prescribed.
Constant-area level-pool basin with free-discharge orifice and ideal emergency crest. No downstream submergence, infiltration, pollutant treatment, sediment accumulation or rainfall-runoff solver. Hydraulic clock is accelerated; dry storage limits withdrawals without creating negative volume.