降雨时程变化对小流域山洪模拟的影响评估  

Evaluating flash flood simulation capability with respect to rainfall temporal variability in a small mountainous catchment

作　　者：王雪梅 翟晓燕 张永勇 郭良 WANG Xuemei;ZHAI Xiaoyan;ZHANG Yongyong;GUO Liang(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,Research Center on Flood and Drought Disaster Reduction,China Institute of Water Resources and Hydropower Research,Beijing,100038,China;Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing,100101,China)

机构地区：[1]State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,Research Center on Flood and Drought Disaster Reduction,China Institute of Water Resources and Hydropower Research,Beijing,100038,China [2]Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing,100101,China

出　　处：《Journal of Geographical Sciences》2023年第12期2530-2548,共19页地理学报（英文版）

基　　金：National Natural Science Foundation of China,No.42171047,No.42071041。

摘　　要：Rainfall temporal patterns significantly affect variability of flash flood behaviors,and further act on hydrological model performances in operational flash flood forecasting and warning.In this study,multivariate statistical analysis and hydrological simulations(XAJ and CNFF models) were combined to identify typical rainfall temporal patterns and evaluate model simulation capability for water balances,hydrographs,and flash flood behaviors under various rainfall patterns.Results showed that all the rainfall events were clustered into three types(Type 1,Type 2,and Type 3) in Anhe catchment in southeastern China.Type 1 was characterized by small total amount,high intensity,short duration,early peak moment,and concentrated hourly distribution.Type 3 was characterized by great total amount,low intensity,long duration,late peak moment,and uniform hourly distribution.Characteristics of Type 2 laid between those of Type 1 and Type 3.XAJ and CNFF better simulated water balances and hydrographs for Type 3,as well as all flash flood behavior indices and flood dynamics indices.Flood peak indices were competitively simulated for all the types by XAJ and except Type 1 by CNFF.The study is of significance for understanding relationships between rainfall and flash flood behaviors and accurately evaluating flash flood simulations.

关 键 词：rainfall characteristic indices flash flood behavior indices hydrological model mountainous catchment 

分 类 号：TV87[水利工程—水利水电工程] X43[环境科学与工程—灾害防治]