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What is the ReFH2 tool?

The ReFH2 tool provides flow rates and volumes for greenfield and developed sites. The UKSuDS tool for storage estimation uses the ReFH2 peak flow rates for greenfield runoff along with a few other parameter values. The storage analysis in the UKSuDS tool is not based on the volumes of runoff that can be predicted by the tool for both the predevelopment and post development states. 

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