See how changing surface composition changes runoff. More metal and concrete means less soil to absorb rain, higher runoff and greater pressure on drains.
Simulation Controls
Represents rainfall over a minimum assumed urban area of 100 sq.km.
0.95
0.85
Soil/green area is automatic: 50%. Soil/green runoff coefficient is fixed at 0.20. Retained water means rainfall that does not become runoff.
Total rainfall volume
0 m³
Total runoff
0 m³
Infiltrated / retained
0 m³
Runoff rate
0%
Area Depiction
Metal 20%
Concrete 30%
Soil / Green 50%
Moderate runoff
MetalHigh runoff coefficient. Rain moves quickly to drains.