%0 Journal Article %A GONG Li %A ZHANG Xiang %A LUO Wei %A TAO Shi-yong %T Characterization and Risk Analysis of Extreme Precipitation in Yangtze River Midstream Urban Agglomerations Based on Multi-Source Rainfall Data %D 2025 %R 10.11988/ckyyb.20231189 %J Journal of Changjiang River Scientific Research Institute %P 83-90 %V 42 %N 2 %X

The urban agglomeration in the middle reaches of the Yangtze River is a mega city cluster located in the central part of China, playing a crucial role in economic and social development. To explore precipitation characteristics and risks in this urban agglomeration in changing environment, we evaluated the applicability of three precipitation datasets: CMFD, MSWEP, and CN05.1, and selected the CMFD (China Meteorological Forcing Dataset) for analysis. We analyzed the changes in rainstorm hazard risks before and after the rapid urbanization by considering factors such as rainstorm amount, rainstorm duration, elevation, slope, population, and land use. Findings reveal that highly urbanized areas, particularly provincial capital cities, have experienced more frequent occurrences and higher intensities of short-duration rainstorms over the past four decades. The amount and duration of rainstorms in the southern part of the urban agglomeration increased significantly, affecting cities like Xinyu, Fuzhou, Nanchang, and Jiujiang in Jiangxi Province. With the progression of urbanization, populations have concentrated in central cities. Consequently, medium- and high-risk areas for rainstorms have increased, especially in the Poyang Lake Metropolitan Area. To effectively manage and mitigate the risks associated with regional rainstorms, we recommend the following measures: integrate multidisciplinary and multidepartment urban monitoring data to gain a comprehensive understanding of precipitation patterns and their impacts; promote research, development, and application of high-precision multiscale monitoring-forecasting-warning systems to enhance early warning capabilities; strengthen research on the mechanisms of urbanization affecting local climate and extreme rainfall events; coordinate grey (infrastructure), green (natural systems), and blue (water bodies) measures to enhance the climate adaptation and resilience of cities.

%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20231189