澜沧江流域云南段土地利用格局变化及环境影响分析

应用1986与2000年TM遥感影像解译生成的澜沧江流域云南段土地利用现状图,在ArcGIS 8.3软件的支持下,进行图形叠加、空间分析和数据统计分析,获取该流域1986-2000年土地利用格局变化图和面积转换矩阵,揭示了该流域1986和2000年土地利用与土地覆被的空间分布规律及14年来的变化特征,并对澜沧江流域云南段14年来土地利用变化对环境产生的影响进行分析.结果表明,澜沧江流域云南段土地利用格局的变化引发了流域水土流失、生物多样性降低、景观破碎化等一系列环境问题. 

Change of Land Use Pattern and Analysis of Environment Impact of Lancang Watershed in Yunnan

By interpretation of TM images respectively in 1986 and 2000, the map of current land use of Lancang watershed in Yunnan was compiled. Through overlaying, spatial analysis and statistic analysis supported by ArcGIS 8,3 software, the map of land use change from 1986 to 2000 and the area transfer matrix of land uses in the given study area were obtained. The spatial distribution pattern and change rule of land use and land cover in this area were showed, and the environmental impacts caused by the change of land use types were analyzed. It was shown that the change could bring a series of environmental issues, such as watershed soil erosion, biodiversity decrease and landscape fragmentation.