江淮水利科技Issue(2)：15-19,31,6.DOI:10.20011/j.cnki.JHWR.202502003
耦合水动力学的皖南山区小流域暴雨山洪动态预演建模策略
Modelling strategy for dynamic simulation and forecasting of rainstorm-flash flood in a small watershed in mountainous area of Southern Anhui
摘要
Abstract
Flash flood in mountainous areas of Southern Anhui are affected by complex terrain and human activities,causing severe ecological damage and social and economic losses.To address the problem of insufficient characterisation of the underly-ing surface conditions caused by static parameter assumptions in traditional flash flood evolution models,a flash flood dynamic evolution modelling strategy was proposed by taking a small watershed in the mountainous area of Southern Anhui as the re-search object.By analysing the causes of rainstorm floods and the impact of underlying surface changes on flood disasters,combined with climate change to reveal the spatial and temporal evolution characteristics of rainstorms and the mechanism of runoff generation and confluence,the flood risk under extreme rainstorm conditions was studied.Based on the diffusion wave theory,a flood routing model for small watersheds in mountainous areas of Southern Anhui Province was constructed,and a scheme for solving the hydrodynamic equation by establishing the dynamic relationship between water depth and roughness through the Manning formula was proposed.The results showed that the dynamic evolution modelling strategy could accurately capture the flood wave motion process,compensated for the limitations of static assumptions through the dynamic parameter feedback mechanism,and predicted the flood submerged water level and submerged area.It provided an effective flood risk as-sessment tool for small watersheds in mountainous areas,and provided model support for the construction of a digital twin wa-tershed platform for disaster prevention and mitigation of mountain torrents in Southern Anhui.关键词
皖南山区/小流域山洪/产汇流演变/水文水动力模型/动态预演Key words
mountainous area of Southern Anhui/small watershed flash floods/impact of runoff generation and confluence/hy-drological and hydrodynamic model/dynamic evolution分类
水利科学引用本文复制引用
程铁杰..耦合水动力学的皖南山区小流域暴雨山洪动态预演建模策略[J].江淮水利科技,2025,(2):15-19,31,6.基金项目
中国博士后科学基金资助项目(2024M760026) （2024M760026）
安徽省自然科学基金"水科学"联合基金项目(2308085US10、2208085US04) （2308085US10、2208085US04）
安徽省(水利部淮河水利委员会)水利科学研究院自主研发项目(KJGG202301) （水利部淮河水利委员会）
