Acta Geographica Sinica ›› 2011, Vol. 66 ›› Issue (9): 1219-1229.doi: 10.11821/xb201109007

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Spatial-temporal Characteristics of Lake Level Changes in Central Asia during 2003-2009

LI Junli, CHEN Xi, BAO Anming   

  1. Xinjiang Institute of Ecology and Geography, CAS, Urumqi 830011, China
  • Received:2011-01-05 Revised:2011-06-08 Online:2011-09-20 Published:2011-11-04
  • Supported by:

    National Natural Science Foundation of China, No.4070633; China Western Doctoral Support Project, No.XBBS200809; Technology Support Xinjiang Project, No.200891128

Abstract: ICESat/GLAS satellite altimetry data is employed to extract lake level information of 24 lakes in central Asia during 2003-2009, and the spatial and temporal characteristics of these level changes are also analyzed with other land features such as drainage basins, glaciers and dam information, so as to discuss the responses of level changes of different types of lakes to climate change and human activities. It is shown that the ICESat/GLAS lake level changes in october correlate with changes of precipitation inside the drainage basins. Glaciers also have great impact on alpine closed lakes, and their level changes act in two modes according to glacier distribution inside the lake drainage basins. Lakes in the Kunlun Mountains, the Pamir Plateau and the middle Tianshan Mountain have glaciers in their drainage basins, whose level changes have positive relations with the lake supply coefficients, while lakes in the Altay Mountains and the Tianshan mountains have no glacier-melting water to feed, whose water levels are negatively related with their supply coefficients. Level changes of open lakes and plain closed lakes aree significantly correlated with the distribution of dams. Lakes with dams decrease dramatically in water levels, while the open lakes without dams remain are stable, indicating that the overexploitation of water resources in central Asia has resulted in lake level decline.

Key words: central Asia, lake, lake level changes, spatial-temporal characteristics, ICESat/GLAS