Characteristics of the temporal and spatial evolution of rainfall under the influence of urbanization: a case study of the Beijing–Tianjin–Hebei region

Water Science & Technology: Water Supply Pub Date : 2023-06-28 DOI:10.2166/ws.2023.161

Chengcheng Xu, Yanzhen Wang, Baiqing Xiao, Qingyan Sun, Chuiyu Lu, Chu Wu

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Abstract

Abstract With rapid urbanization in recent years, the frequency of extreme rainfall events has increased in major cities around the world during the flood season, and the social and economic losses caused by heavy rainfall are becoming increasingly serious. The results show that (1) the overall duration of rainfall exhibits a downward trend, and the overall spatial performance gradually decreases from east to west. (2) The mountainous areas are prone to light and moderate rainfall events; the plains are more prone to rainfall events at levels above moderate rain, especially rainstorms and heavy rain events; the probability of light and moderate rainfall events in the suburbs is close to that of the urban areas, but the probability of rainfall events at levels above heavy rain is less than that of the urban areas; the probability of rainfall events of all levels in the outer suburbs is higher. (3) Increase in rainfall in urban areas compared to the southern suburbs is greater. (4) With increasing urbanization, the built environment in the mountainous areas and plains has continued to grow, and the original underlying surface conditions have changed.

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城市化影响下的降雨时空演变特征——以京津冀地区为例

近年来，随着城市化的快速发展，世界主要城市汛期极端降雨事件的发生频率有所增加，强降雨造成的社会经济损失日益严重。结果表明:(1)降雨持续时间总体呈下降趋势，总体空间表现自东向西逐渐降低;(2)山区易发生小、中降雨事件;平原更容易发生中雨以上的降雨事件，特别是暴雨和暴雨事件;郊区出现小雨和中雨事件的概率与城区接近，但出现暴雨以上级别降雨事件的概率小于城区;远郊发生各级降水事件的概率较高。(3)与南郊相比，城区降水增加幅度更大。(4)随着城市化进程的加快，山区和平原地区的建成环境持续增长，原有的下垫面条件发生了变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Water Science & Technology: Water Supply

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