断流34年后塔里木河干流景观现状分析

以塔里木河干流为研究靶区,利用2006年CBERS-1影像,从景观格局指数及斑块等级方面为切入点,对研究区景观做出最新判断。结果表明:从1972年塔里木河下游断流以来,不仅使下游生态环境恶化,而且间接地影响了中、上游植被情况。虽然放水后整个干流植被在一定程度上已有所改善,截止2006年年底,仍然以低质植被支撑着整个生态系统,斑块等级极化现象严重。从各景观类型面积变化率来看,上游到下游农田面积大幅度增加。从景观类型生态作用来看,植被在生态正效益方面具有明显优势,而农用地对生态具有负效益。

Analysis of Landscape Status after Water Interception for 34 Years in Tarim River Mainstream

The object of the study was to investigate the regional landscape in the Tarim River mainstream by using CBERS-1 image in 2006.The results indicated that since 1972,the water interception occurred,the environment in the lower reaches of Tarim River had worsened,which harmed the vegetation in the middle and upper reaches of Tarim River.Before the end of 2006,there still was poor vegetation in the ecological system there.From angles of the landscape type ecological action,vegetation was the district superiority in the positive benefits,however,the farmland had negalive effect for ecology.