摘要
近年来,极端天气呈多发、频发态势。2021年密云水库创历史高水位155.30 m,流域年平均降水量为建库以来历史第一,年来水量为历史第二,“21·7”场次暴雨洪水是近年来密云水库流域典型暴雨洪水;而“23·7”暴雨洪水是近年来受台风影响的旱涝急转的典型暴雨洪水。通过2场暴雨洪水的降雨、洪水过程情况对比分析,总结密云水库流域暴雨成因、时空分布特征、洪水特性和演变规律。研究成果为密云水库典型暴雨洪水预报提供借鉴,为水旱灾害防御工作提供参考。
In recent years,extreme weather events have become more frequent and intense.In 2021,the water level of the Miyun Reservoir reached a historical high of 155.30 m,which was the highest annual average rainfall in this basin since the reservoir was built,and the second highest annual inflow in history.The"21.7"rainstorm flood was a typical rainstorm flood in Miyun Reservoir basin in recent years,while the"23.7"rainstorm flood was a typical example of rapid transition from drought to flood influenced by a typhoon.By analyzing the rainfall and flood processes of these two events,this study compared and contrasted the causes of the rainstorms including spatial and temporal distribution characteristics,flood characteristics,and evolution patterns.These findings provide insights for forecasting future typical rainstorm floods in Miyun Reservoir and offer valuable reference for flood and drought disaster prevention efforts.
作者
段新光
潘连和
胡琦
刘福平
褚旭
苏赫
DUAN Xinguang;PAN Lianhe;HU Qi;LIU Fuping;CHU Xu;SU He(Beijing Water Conservancy Project Management Center,Beijing 100038,China;Beijing Miyun Reservoir Management Office,Beijing 101512,China;Beijing North Canal Management Office,Beijing 101100,China)
出处
《北京水务》
2024年第4期28-34,共7页
Beijing Water
关键词
密云水库
暴雨
洪水
Miyun Reservoir
rainstorm
floods
