应急输水工程对塔里木河下游生态环境时空变化影响的遥感监测与分析

采用现代化高新技术对流域生态环境进行动态监测，是流域规划和综合治理的重要依据。本文以塔里木河下游地区的三期遥感影像及基础背景数据为基础，基于遥感和GIS技术，通过分类体系划分、遥感解译、生态模型构建，实现了塔里木河下游地区多源、多类型监测数据的定性、定量分析。分析结果表明：应急输水工程实施后，随着累计输水量的逐渐增加，塔里木河下游地区的中、高植被覆盖度面积也逐渐增加，非沙漠化和轻度沙漠化面积扩大，而中度沙漠化面积缩小，生态环境趋于好转。

The Remote Sensing Monitor Study and the Analysis and Research on Effects of Emergent Water Project on Vegetation Coverage in the Lower Reaches of Tarim River

Using high technology to monitor of river dynamically is the important basis of the planning and comprehensive reclamation of river basin. The paper takes the tree-period remote sensing images of the lower leaches of tarim river as basic data and realized the multi-source and multi-type monitored data of qualitative and quantitative analysis through classification system, remote sensing interpretation and ecological models based on RS and GIS. The results show that the moderate and high vegetation coverage areas increased gradullay, none and slight desertification areas showed expand, maderate desertification areas showed the opposite tendency, ecological enviromnet recovered gradually with the accumulated outflow increaing after the implemention of the emergence water transfer project.