基于RS和GIS的塔里木河干流生态环境状况评价

干旱区内陆河流域生态环境的变化关系到人类的生存和社会的发展。针对塔里木河干流区域在综合治理前后的环境变化状况,以1990、2000年和2010年7—8月的3期Landsat-TM和中巴资源卫星遥感数据为基础,借助RS、GIS手段和生态环境状况指数方法,对比分析了综合治理前后生态环境的特点,得知塔里木河干流的生态环境在综合治理前处于最差的级别,综合治理后有明显改善。虽然,综合治理遏制了生态退化的趋势,但是流域内生态脆弱的现状并没有发生根本扭转,仍需要进一步地增加治理投入,巩固和增强综合治理的效果。

Change of Ecological Conditions in the Mainstream Area of the Tarim River based on RS and GIS during the Period of 1990-2010

Change of the eco-environment in continental river basin in arid zone is closely related to human survival and social development.In order to discuss the eco-environment change in the mainstream area of the Tarim River during the period from 1990 to 2010,the variation of ecological conditions was analyzed based on the Landsat-TM and CBERS images in 1990,2000 and 2010 using the RS & GIS means and ecological index method.The results revealed that the ecological index (EI) of the mainstream area of the Tarim River was low before implementing the comprehensive management.However,after implementing the project,the ecological conditions have been obviously improved.Even though the ecological degeneration trend was contained after implementing the project,the ecology in the drainage basin was still fragile,and more investments are needed so as to strengthen the effect of the comprehensive management.