The"Rainstorm Runoff Calculation Chart"played a crucial role in flood calculation for hydraulic engineerings,roads and bridges in areas of China lacking measured rainstorm and flood data.However,commonly used methods for design flood in small and medium watersheds,such as the empirical formula method and unit hydrograph method,often lack clear physical meaning and rely heavily on subjective experience,which greatly limits the design of hydraulic projects in regions without rainstorm flood calculation manuals.Concerning those situations,we used the hillslope storage dynamics model(HSDM),using key structural characteristics of the watershed and measured rainstorm flood data in Shuangfu watershed in southwestern China to determine model parameters.The flood calculation results were compared with those obtained from flood frequency analysis,empirical formula method,and unit hydrograph method,showing reasonable agreement.The results indicate that the HSDM shows an explicit physical mechanism.The parameters are more physically reasonable,which can be determined through fewer field surveys,laboratory experiments,or engineering analogies.By combining the HSDM with watershed flood surveys,field investigations,and laboratory experiments,it is possible to achieve applicable design flood calculation results,promoting its application in practical production.
关键词
中小流域/设计洪水/山坡蓄量动力学模型/推理公式法/单位线法
Key words
small and medium watersheds/design flood calculation/HSDM/empirical formula method/unit hydrograph method
维普
万方数据