近30年杭州市主城区不透水面的演变与驱动机制分析OA

In this study,based on Landsat series and Sentinel-2 remote sensing image data,we analyzed the spatio-temporal change characteris-tics and driving factors of impervious surfaces in the main urban area of Hangzhou City,Zhejiang Province from 1990 to 2023 using an improved normalized difference impervious surface index(MNDISI)combined with GIS spatial analysis methods.The results show that ①a significant increase in impervious surface area,from 257.92 km2 to 3 032.99 km2,with the average annual growth rate decreasing from 26.16%to 1.99%.②A notable shift in the weighted center of impervious surfaces,with standard deviation ellipse analysis indicating that the long axis direction grad-ually changed from southwest-northeast to east-west.Growth patterns show regional differences,with different areas experiencing growth at different time periods.③A variety of natural and socio-economic factors,including topography,river systems,population growth,economic development,policy guidance,transportation infrastructure,and technological progress,all contribute to the growth of impervious surfaces.