Analyze And Study The Change Of Water Resources In Kashgar Region In Recent Twenty Years Based On Landsat5TM Imagers

In order to research change of water resources in Kashgar Region and analyze the influence of the driving mechanism, such as natural environment and economy, the paper, based on the remote sensing data of around1990,2000and2010,36maps in total, categorizes water resources into two groups:planar water(water body, lake, glacier) and linear water(river system, man-made trench). With the method of visual interpretation and computer interpretation, the area of planar water and the length of linear water were calculated, separately. Additionally, concerning the corresponding local climate and economy data, statistical results form those data indicate that the area of water body, lake and glaciers has decreased by92km2,152km2and875km2, respectively, and the length of river system experienced a loss of421km, whereas the length of man-made trench has increased by528km. In recent two decades, a phenomenon named "warm and wet transition" occurred, whose specific performances, in this paper, are that the average annual temperature has significantly grown0.048℃per year, and the annual precipitation by1.5mm/10a.The analyze_indicates that increasing glacier melting because of increasing temperature in summer, however, water resources in winter began to decrease. While at the same time, increasing temperature in Kashgar Region induces shriveling stores of glacier. And the precipitation, during this time, keeps increasing in a low ratio and thus can not increase water resources in Kashgar Region in a large margin. Furthermore, economy dates show that demand for water has obviously risen owning to the rapid increase of population and GDP, which are also the important factors resulting in decreasing trend of surface water.