摘要
随着合肥市城市化进程的不断加快,合肥市城市不透水面也在不断扩张.为了更好地了解合肥市城市不透水盖度的空间分布状况,应用Landsat 8卫星中的OLI和TIRS影像,利用归一化差值不透水面指数(NDISI)来提取合肥市城市不透水层盖度,并对其进行分析.通过计算得出:2017年,合肥市市区不透水层占研究区面积的6.22%,透水层占研究区面积的93.78%.城市不透水层变化是反映城市化进程的一个重要标志.利用遥感技术对合肥市城市不透水面盖度进行估算,研究成果对合肥市的城市规划、环境质量评价、经济发展及城市化进程等都有重要意义.
With the process of urbanization in Hefei,the city's water impermeable surface is also expanding continuously. In order to better understand the spatial distribution of impervious cover in Hefei,the OLI and TIRS images in Landsat 8 satellites were used to extract Hefei city impermeable layer cover by normalized difference impermeable surface index( NDISI) degree,and its analysis. Through the calculation,in 2017,the urban impermeable layer of Hefei city accounted for 6. 22% of the area of the study area,and the permeable layer accounted for 93. 78% of the area of the study area. Urban impermeable changes are an important sign of urbanization. Based on the remote sensing technology,the urban impervious surface coverage of Hefei city is estimated. The research results are of great significance to the urban planning,environmental quality evaluation,economic development and urbanization process of Hefei.
引文
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