SuDS Greenfield Runoff Flow Calculation
Freeflush
£120
Price read from Freeflush on 2026-10-15. Check before buying.
The Greenfield runoff calculation estimates the peak flow rate of surface water runoff that naturally flows off an undeveloped land during rainfall events. Once an application to develop the land is submitted, the Regulatory Authorities such as the Lead Local Flood Authorities, Local Planning Authorities and Water Authorities typically request the Greenfield runoff calculations which determine the flow rate for the proposed development. This will then be used to size for the surface water drainage system. Required information: Address and Postcode of development. Existing area (m2). If a SuDS
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