基于RS和GIS的淮河源土地利用变化及驱动力分析

Analysis of Land Use Change and Driving Forces based on RS and GIS

以淮河源1993、2003、2013年三个时期的遥感影像为主要数据源,利用GIS和RS技术,采用监督分类、叠加分析、主成分分析等方法,对淮河源20年间的土地利用时空变化特征及驱动因素进行分析.结果表明:耕地、水体和未利用地呈减少趋势,其中耕地变化幅度最大;居民地持续增加;林地面积先减后增.人口因素、经济因素和城市发展因素是淮河源土地利用变化的主要驱动因素.

Using the remote sensing images of Headwaters of the Huaihe River Basin in the years of 1993、2003、2013as the main data sources,the spatial and temporal variation characteristics of land use in Headwaters of the Huaihe River Basin during the past 20 years and the driving factors were analyzed by using GIS and RS technology,supervised classification,overlay analysis and other methods.The results showed that：（1）the cultivated land,water and unused land showed a decreasing trend,among which the change of cultivated land was the largest;the residential land increased continuously;the area of forest land decreased first and then increased;（2）the population,economic and urban development were the main driving factors of land use change in Headwaters of the Huaihe River Basin.