基于RS的芜湖市土地利用动态变化及其生态环境效应

基于芜湖市1988、2000、2007年三期TM遥感数据,对芜湖市近20年来的土地利用动态变化及其生态环境效应进行分析.结果显示:近20年来,芜湖市土地利用变化显著,以耕地减少和建设用地增加为主要特征,耕地面积共减少47.86km2,同期,建设用地面积增加51.52km2,其中,耕地转入48.44km2,占转入总面积的91.90%;芜湖市1988、2000、2007年EV值分别为0.336、0.326、0.312,生态环境质量呈下降趋势,其中,以东北—北、东南—东、东南—南、西北—北四个方向下降最为严重,与建设用地扩展方向一致.

Changes of Land Use and Its Eco-Environmental Effect in Wuhu City Based on Remote Sensing

The land use change and its eco-environmental effects of Wuhu in recent 20 years were analyzed based on Landsat TM data of 1988,2000 and 2007.The results showed that the change of land use was significant in the past 20 years.The major changes were the cultivated land area decreased and the construction land area increased.The cultivated land area was reduced by 47.86km2,and in the same period,the construction land area increased by 51.52km2,in which the area transferring from cultivated land was 48.44km2 and the percentage reached 91.90%.The values of EV respectively were 0.336,0.326,0.312 in the three different periods,and the eco-environmental quality was downward trend,which was consistent with the propagation direction of construction land.And among them,the four directiones,the Northeast-North,Southeast-East,Southeast-South and Northwest-North,were decreased most seriously.