3. RESULTS
3.1 Distribution patterns of urban flooding points
From 2011 to 2021, urban flooding points were mainly of the districts Haidian and Fengtai (Fig.3). The low-density area of urban flooding points was mainly distributed in the edge of the study area. Interestingly, the historic districts of Beijing, such as Dongcheng and Xicheng districts, had fewer flooding points. Results of Local Morans I showed that the urban flooding hot spots were obvious (Fig.3). The hot spots were mainly distributed in Haidian and Fengtai districts, while cold spots were small and aggregated in northeast of the study area and dispersed in the southeastern part of the study area.