近20年北京地区景观格局演变研究

Landscape pattern evolution of Beijing in recent 20 years

利用ERDAS遥感解译软件对北京地区1984、1997年Landsat TM数据以及2002年ETM数据进行解译处理,分析并利用FRAGSTATS软件计算景观类型、景观2个等级水平的指数,对北京市景观格局变化进行分析。结果表明:1997-2002年城镇建设用地面积增加了近一倍,城市化造成农田损失速度加快;研究区内景观类型斑块面积差异较大;1984-2002年的景观变化并没有造成景观类型等级构成的明显变化;平原区景观类型破碎化速度加快,需要加强土地利用规划和管理。

The Thematic Mapper image data of 1984,1997 and ETM data of 2002 in Beijing were interpreted through ERDAS.The landscape indices of landscape type and landscape level were calculated using the FRAGSTATS software.The analysis on the changes of Beijing landscape pattern indicates that the urban area nearly doubled during 1997--2002,and farmland decreased rapidly as a result of urbanization.There was much difference in the patch area of landscape types in Beijing.Landscape variations during 1984--2002 did not cause obvious changes in rank of landscape types.Fragmentation pace of the landscape types in plain area quickened,and the layout and management of land use need to be strengthened.