|关键词: 气候变化 冰川 博斯腾湖 开都河 水量平衡
|Effect of glaciers change to water balance of Lake Boston under climatic backgrounds
SUN Zhandong1,2, WANG Run2
1.Graduate School of Chinese Academy of Sciences, Beijing 100039, P. R. China;2.Nanjing Institute of Geography and Limnology, C45, Nanjing 210008, P. R. China
|According to the water-balance analysis carried out in Lake Bos ten, discharge of Kaidu River tributary accounts for 85% of the lakes inflow, and thus plays a crucial role in the fluctuation of its water-level. Glaciers, as an important component of the water resources in the upper reach of Kaidu River valley, has had a considerable effect upon by the global and regional climate change of recent years. Water melted away from glaciers has channeled into the downstream section of the river and exceeds the base flow to have entered the Kaidu River over the past twenty years, during which time the lake keep a high inflow level. Small-sized glaciers are more sensitive to temperature rising. With the gradual diminishing and eventual disappearance of these small and middle scale glaciers situated in a fairly low-altitude location, the ELA (snow-line) will rise and the icecap will become thin. Hie volume and distribution area of the glacier will decrease, which will make the glacier less sensitive to climate change (in other words, preventing the glacier from melting to such a degree), and bring less glacier-melt water discharge. As a result, the water-supply from melting glaciers that will flow into Lake Bosten will lessen.
|Key words: Climate change glaciers Lake Bosten Kaidu River water balance