下垫面因素对城市内涝的影响探究——以广州市黄埔区为例

Studies on the influence of underlying surface factors on urban waterlogging:A case of Huangpu district,Guangzhou city

快速城市化背景下城市下垫面的变化极大地改变了城市地表水文状态进而提升了内涝风险,研究内涝风险与下垫面相关要素之间的相关性对于提升城市预防内涝风险能力具有重要意义。从下垫面地貌、下垫面结构特征、人造城市地表强度、排水系统等四个方面选取12个因子,基于主成分分析方法对黄埔区下垫面与内涝的相关性进行研究,筛选影响黄埔区内涝风险的主要因子与相关要素。研究结果表明,DEM、建设用地密度和排水口分布显著影响黄埔区内涝分布情况。

Under the background of rapid urbanization,the changes of urban underlying surface have greatly changed the urban surface hydrological state and thus increased the risk of waterlogging.Therefore,research on the correlation between waterlogging risks and related factors of underlying surface is of great significance for improving the ability of cities to prevent waterlogging risks.In this study,12 factors were selected from four aspects,including underlying surface topography,underlying surface structural characteristics,the strength of artificial urban surface and drainage system in order to explore the correlation between underlying surface and waterlogging in Huangpu district based on principal component analysis method,the main factors and related factors affecting waterlogging risk in Huangpu district were screened.The results showed that DEM,construction land density and drainage outlet distribution significantly affect the distribution of waterlogging in Huangpu district.