中国防汛抗旱2025，Vol.35Issue(11)：6-11,6.DOI:10.16867/j.issn.1673-9264.2025570
密云水库流域"25·7"暴雨洪水模拟与产汇流特征分析
Simulation and analysis of runoff yield and confluence characteristics of the"25·7"rainstorm flood in the Miyun Reservoir Basin
摘要
Abstract
The Haihe River Basin experienced an extreme rainfall event in late July 2025 which caused the largest recorded flood in the Miyun Reservoir since its impoundment in 1959.A digital watershed model of the Miyun Reservoir Basin was constructed to simulate the"25·7"flood process and analyze the runoff yield and confluence characteristics.The simulation results showed that this flood exhibited a distinct"double-peak"hydrograph.The first flood peak occurred on July 27th,with a simulated peak inflow of 6 323 m3/s(observed 6 550 m3/s)on baseflow of prior rain-runoff release.The second peak occurred on July 28th,with a simulated flow of 4 823 m3/s(observed 4 550 m3/s).The cumulative inflow volume over seven days reached 0.974 billion m3(observed 0.91 billion m3),corresponding to a recurrence period of exceeding 100 years.The simulation results indicate that antecedent precipitation and soil moisture retention significantly enhanced the runoff coefficient during successive storms.Therefore,when applying hydrological analysis methods to calculate runoff yield,it is crucial to account for antecedent rainfall conditions and make necessary adjustment of runoff coefficient to avoid underestimating peak discharges.关键词
密云水库/海河"25·7"区域性大洪水/数字流域模型/洪水模拟/产汇流特征Key words
the Miyun Reservoir/"25·7"Regional Major Flood in Haihe River Basin/digital watershed model/flood simulation/characteristics of runoff yield and confluence分类
地球科学引用本文复制引用
刘家宏,方昭妍,王海彬,严登华..密云水库流域"25·7"暴雨洪水模拟与产汇流特征分析[J].中国防汛抗旱,2025,35(11):6-11,6.基金项目
国家重点研发计划(2022YFC3090600) （2022YFC3090600）
水利部数字孪生流域重点实验室开放研究基金. （）
