Simulation on flood processes based on three rainfall runoff schemes:A case study of Sunshui River Basin in Southwest China
Accurate simulation of floodpeak and its hydrograph is crucial for flood control and disaster reduc-tion analysis.The selection of rainfall loss and runoff generation model is often critical for flood process simula-tion.To evaluate the applicability of different rainfall loss and runoff generation models in the Sunshui River Basin in Southwest China,this study constructed three rainfall-runoff modeling schemes(scheme 1:SCS Curve Number method+Snyder Unit Hydrograph method,scheme 2:Initial Constant Rate method+Clark U-nit Hydrograph method,scheme 3:Green-Ampt method+SCS Unit Hydrograph method).The HEC-HMS model was used to simulate 15 flood events from 2007 to 2018.The results showed that Schemes 1 and 2 dem-onstrated satisfactory performance in simulating the flood hydrographs in the study area,with Scheme 1 per-forming better for single-peak flood events and Scheme 2 performing better for double-peak flood events.In comparison,Scheme 3 exhibited inadequate simulation performance.The findings of this study can provide reference for flood simulation and prediction in similar areas.
HEC-HMSSunshui River Basinrainfall loss modelrunoff generation model
NETL
NSTL
万方数据
