Stormwater Pump Station Design Calculator (Metric MKS)

Enter all required inputs below to generate a detailed design report for a stormwater pump station. Calculations use standard engineering methods (e.g., Rational Method, simplified routing) in the Metric MKS system. Results are approximate—consult a professional engineer for final designs.

Input Parameters

Catchment and Rainfall

Runoff Coefficient (C, 0-1): Rainfall Intensity (i, mm/hr): Catchment Area (A, hectares): Time of Concentration (Tc, min): Storm Duration (hours):

Pump and Wet Well

Total Pump Rate (m³/s): Number of Pumps: Ground Elevation (m): Safety Freeboard (m): Wet Well Height (m, effective): Min Cycle Time (min): Max Starts per Hour:

Hydraulic Losses

Static Lift (m): Friction Losses (m): Minor Losses (m):

Pump Curve and Efficiency

Pump Curve Coefficient a (m, shutoff head): Pump Curve Coefficient b (m/(m³/s)²): System Loss Coefficient k (m/(m³/s)²): Pump Efficiency (decimal, 0-1):

Routing

Routing Time Step (seconds):

Stormwater Pump Station Design Report

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