Flood risk assessment of check dams in the Wangmaogou watershed on the Loess Plateau of China

作     者：GAO Ze-chao SHI Peng LI Zhan-bin LI Peng BAI Lu-lu JIA Yi-li CUI Lin-zhou GAO Ze-chao;SHI Peng;LI Zhan-bin;LI Peng;BAI Lu-lu;JIA Yi-li;CUI Lin-zhou

作者机构：State Key Laboratory of Eco-hydraulics in Northwest Arid Region of ChinaXi'an University of TechnologyXi'an 710048China Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid RegionsXi'an University of TechnologyXi'an 710048China Northwest Institute of Forest InventoryPlanning and DesignNational Forestry and Grassland AdministrationXi’anShaanxi 710041China College of Life and Environmental ScienceWenzhou UniversityWenzhou 325035China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2023年第20卷第12期

页      面：3631-3647页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081504[工学-水利水电工程] 08[工学] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China (Grant 42077073, 42373063, 42307447) Natural Science Basic Research Plan in Shaanxi Province of China (2022KJXX-62) 

主　　题：Check dam Return period Flood control risk Dam failure Inundation loss 

摘      要：Check dams have been widely used in China’s Loess Plateau region due to their effectiveness in erosion and flood ***,the safety and stability of the check dam decrease with the operation process,which increases the probability of dam failure during flood events and threatens local residents’ life and ***,this study simulated flood process of the check dam failure in the Wangmaogou watershed in Yulin City,Shaanxi Province,China,calculated different types of inundation losses based on the flood inundation area within the watershed,and determined the number of key flood protection check dams by classifying the flood risk levels of the check *** results showed that 5 dams in the watershed were subject to overtopping during different rainfall return periods,which was related to their flood discharge *** failure flood process showed a rapid growth trend followed by slow decrease,and the time of flood peak advanced with increase in the return *** harmonization of evaluation scales,the magnitude of flood inundation losses can be ranked as:economic losses(212.409 million yuan) life losses(10.368 million yuan) ecological losses(6.433 million yuan).The risk value for both individual dams and the whole dam system decreases as the return period *** number of key flood protection check dams in the Wangmaogou watershed was 2,3,3,3,4,and 5 for floods with return periods of 10,20,30,50,100,and 200 years,*** results provided a theoretical basis for the safe operation and risk evaluation of check dams in the Loess Plateau Hills watershed.