Rainfall-Storage-Pump-Discharge (RSPD) Model for Sustainable and Resilient Flood Mitigation

摘要

Urban flooding is becoming an increasingly important issue in the 21~(st) century, due to climate change and urbanization. Traditional methods of extensive flood-control infrastructure are challenged. Micro-scale rainwater management which stores some of rainfall from building rooftops can reduce flooding of nearby sewer systems. And the reduction of peak runoff can then calculated using the rainfall-storage-discharge (R-S-D) model. By controlling drain pump, flooding can be further mitigated without costly changing the existing systems, working toward resilient and sustainable flood mitigation approach. The reduction of peak runoff can be calculated using the rainfall-storage-pump-discharge (R-S-P-D) model. From the R-S-P-D model, TPP curves and TPD curves are developed to determine the reduced peak flow and increased design return period for a combination of tank volume and pumping rate. These curves will be used in the design and operation of rainwater systems in areas of limited sewer capacity or for climate change adaptation.