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Compare Storm Water Drainage Calculator scenarios

Three side-by-side scenarios of the same calculator. Change any input in any column and the result recomputes live.

Scenario A

Catchment Area(hectares)

Design Rainfall Intensity(mm/hr)

Runoff Coefficient

Pipe Slope(%)

Manning's Roughness Coefficient

Required Pipe Diameter

6,694 mm

Scenario B

Catchment Area(hectares)

Design Rainfall Intensity(mm/hr)

Runoff Coefficient

Pipe Slope(%)

Manning's Roughness Coefficient

Required Pipe Diameter

6,694 mm

Scenario C

Catchment Area(hectares)

Design Rainfall Intensity(mm/hr)

Runoff Coefficient

Pipe Slope(%)

Manning's Roughness Coefficient

Required Pipe Diameter

6,694 mm