Study on ecological environment evolution law in Junggar basin based on RS and GIS

Junggar basin, located in the northwest arid areas of China, has vulnerable supergene ecological environment because of natural and anthropic factors. In this paper, based on the relationship between groundwater and ecological environment and combined with natural and geographical conditions, Junggar basin is divided into five ecosystem types: mountain, natural oasis, artificial oasis, natural water and desert. According to the above five ecosystem types, ecosystem zone maps of Junggar basin in 1990, 2000 and 2009 are obtained by interpreting remote sensing images from Landsat based on RS(Remote Sensing)and GIS(Geographic Information System). On the basis of ecosystem zone maps of three periods, evolution law of ecological environment in Junggar basin is concluded and some existing problems of ecological environment, caused by ecological environment change of three periods, are analyzed.