Abstract:

Arid area of wetlands as a special landscape type in the arid zone, it is one of the most productive ecosystems and plays an important role in region eco-environment conversation and local water cycles. So, its expansion or deduction is bound to impact the regional ecological environment. Bosten basin is one of the largest lake wetland distribution areas in Xinjiang arid area.We used Landsat series data as the main data source, achieved 3 times remote sensing wetlands mapping (1990, 2000, 2010). And then, we analyzed Bosten basin wetlands distribution status, explored spatial and temporal changes process of regional wetlands and dynamic characteristics. The results showed that, the area of wetlands in Bosten basin has been decreasied in recent decades. The total area of wetland has reduced 16.24% in past 20 years. But, the rate of deduction is slowing down and the different type of wetlands changes process is different. The details are as follows. In 1990-2000, river wetlands and lake wetland performance increasing trend, and reed wetland was decreasing. In 2000-2010, river wetland, reed wetland and lake wetland area were all in shrinking. Through the coupled relationship analysis between the wetland change and the factor of the regional ecological environment showed that: wetlands changes in the Bosten lake region are mainly impact by human activities in short-term.

Key words: wetlands, remote sensing, spatio-temporal change, Bosten basin