北京水务Issue(1)：42-48,7.DOI:10.19671/j.1673-4637.2025.01.008
永定河流域"23·7"降雨时空分布特征
Spatial and temporal distribution characteristics of rainfall in Yongding River Basin in the Haihe"23·7"basin-wide extreme flood
张玉洁 1刘军梅 1张建涛 1吴琼1
作者信息
- 1. 北京市水务规划研究院 北京 101117
- 折叠
摘要
Abstract
To explore the variation patterns of the"23·7"catastrophic flood in the Yongding River Ba-sin,the inverse distance weighting method was employed for spatial interpolation of rainfall according to the monitoring data from 24 rainfall stations.The spatial and temporal distribution,recurrence period,and hourly heavy rainfall of rainfall events with different durations were analyzed.The results showed that the spatial distribution of rainfall exhibited extreme characteristics,with rainfall primarily concentrated in the Guanting Mountain Gorge,where the average rainfall reached 573 mm.The 1-hour rainfall was highly localized,with the highest values near Yanjiatai station.The spatial distribution of maximum rainfall over 24 and 72 hours showed similar patterns,with high values near Qingshui and Datai stations.The hourly rainfall intensity during the heavy rainstorm was high,with the hourly rainfall intensity at Qingshui sta-tion accounting for 63％total rainfall.The characteristics of hourly rainfall for different intensity levels varied by region.In the Yongding River Basin and Guanting Mountain Gorge,the proportions of rainfall in the 10-20 mm range were 45％and 37％,respectively,playing a dominant role in the total rainfall.The probability of ≥20 mm hourly rainfall in the area below Sanjiadian was only 8％,but it accounted for 40％of the total rainfall.The findings provide technical support for flood warning and disaster prevention.关键词
永定河/海河"23·7"流域性特大洪水/时空分布/小时强降雨Key words
Yongding River/Haihe"23·7"basin-wide extraordinary flood/spatial and temporal distri-bution of rainfall/hourly heavy rainfall分类
建筑与水利引用本文复制引用
张玉洁,刘军梅,张建涛,吴琼..永定河流域"23·7"降雨时空分布特征[J].北京水务,2025,(1):42-48,7.
