Natural Eco-environment Comprehensive Assessment by Remote Sensing Technology in West Route Area of South-West Line Project
南水北调西线一期工程调水区生态环境质量遥感分析与综合评价

South-West Line project is major inter-basin water transfer project diverting water from main stream and branch of the Yangtze River upstream into the Yellow River upstream,and it is great significance to solve shortage of the Yellow River Water Resources.But prior to the implementation of the project,it is necessary to objective evaluate water diversion areas on the ecological environment quality.In this paper,based on a large number of field investigations and laboratory comprehensive analysis the eco-environment of west route diverting water region was evaluated.Throughout the course of the study mainly use modern remote sensing technology and geographic information system analysis methods,integrated thinking in geo-ecological system theory and under the guidance of the study area from the effects of environmental quality factor of the six layers of data,overlaid to form a comprehensive environment index layer data,its were divided into four regional environment.The Composite Index from the natural environment of space analysis showed that integrated the natural environment index Class 1 and Class 2 district have good natural conditions,concentrated in the eastern part of the study area,and account for research area 50%.Three areas are more sensitive natural areas,mainly located in the western part of the plateau region of diverting water; four areas are relatively fragile natural environment,the poor regions,mainly located in the high-cold region of water diversion zone.Therefore,the Class 1 and Class 2 district have some of the natural environment of anti-jamming capabilities,in the appropriate environmental protection measures,can be a certain scale of the project; three district works,we must pay special attention to all of the natural environment the protection measures,intensify environmental protection efforts and input on the four areas of the building will cause greater damage to the environment,it is not appropriate to carry out the works building.