基于遥感监测的无锡市土地利用变化特征及其驱动力分析

Land-use Variation Characteristics in Wuxi City Based on Remote Sensing Monitoring and Driving Forces Analysis

以无锡市2000、2005和2010年Landsat TM影像为数据源,采用决策树分类方法将无锡市土地利用类型分为建设用地、耕地、林地、园地和水域5大类。同时利用土地利用转移矩阵分析了2000～2010年无锡市土地利用特征。最后结合无锡市社会经济和人文数据,对无锡市土地利用变化的驱动力进行了分析。结果表明:2000～2010年无锡市各种土地利用类型总量和比例发生了巨大变化,城市建设用地面积不断扩大,耕地面不断减少,而园地和水域面积有小幅度的上升,林地基本维持在原来的比例,减少的耕地大部分转换为建设用地、水域和园地。人口的急剧增加和经济的快速发展是导致土地利用发生变化的2个重要原因。

Taking the Landsat TM images in 2000,2005 and 2010 as the data source,the land-use types in Wuzi City were classified into five categories including construction land,farmland,forest land,orchard and water area by using decision-making tree method.The land-use characteristics during 2000-2010 were analyzed by using land-use transfer matrix.Finally,combined with social economy and humanistic data in Wuxi City,the driving forces for land-use change were analyzed.The results showed that the gross and proportion changes significantly in Wuxi City from 2000 to 2010,the area of urban construction land expands unceasingly,but the area of arable land is decreasing,and the area of garden plot and water area has been a small rising,forest land maintain the old proportion on the whole.Most of the reduced arable land change to construction land,water area and garden plot,and the land use degree compound index improved constantly.Population growth and economic development are two important factors which impact the change of land use in Wuxi City.