Greenfield Runoff Rate
The Greenfield Runoff Rate is the rate at which rainfall would runoff from an undeveloped, naturally permeable catchment. Review drainage modelling services to ensure your post-development discharge meets LLFA requirements. The national SuDS standards set out exactly how greenfield runoff rates must be calculated and applied.
Case Example
To prevent flooding neighbours, a new housing estate is usually restricted to the “Greenfield Rate,” meaning pipes cannot discharge water faster than the original field did.
Meet LLFA rules. Rida Reports calculates runoff rates within your FRA.