Abstract:The Ejina natural oasis landscape lies in the lower reaches of the Heihe river basin in the arid inland regions of northwestern China. With decreasing water resources from the upper reaches of the Heihe river basin, many urgent ecological and environmental issues in the Ejina natural oasis have become more pressing in recent years. Using remote sensing techniques and GIS, based on Landsat Thematic Mapper data in 1987 and 1994 and Landsat Enhanced Thematic Mapper Plus data in 2001, the changing patterns of ...