LIU Baokang, LI Lin, DU Yu'e, LIANG Tiangang, DUAN Shuiqiang, HOU Fujiang, REN Jizhou
In recent years, there is a warm and wet tendency over the Tibetan Plateau, as a result, the lake levels extensively rise up and dike burst happens occasionally. In this study, the TM(ETM+)history document data and environmental mitigation satellite(HJ-1A/B)CCD data in the Zonag Lakes(including Kusai Lake, Hedin Noel Lake and Yanhu Lake), combined with the air temperature, precipitation data from Wudaoliang Meteorological Station, were used to analyze the variation of lake surface area. The results showed that from 1961 to 2012, precipitation had increased in Hoh Xil, which was the basis of the Zonag Lake outburst. Two strong precipitation processes occurred before August 22, 2011 and then followed by a continuous precipitation, which led to a substantial leakage of the lakes, and finally led to outburst. There were two earthquake events before the dike burst, which may have a certain influence on the basin structure of the lakes, accelerating the dike burst process. Outburst of the lake led to shoreline retreat and land desertification, which deteriorated the Tibetan antelope farrowing environment and resulted in adverse impact on the surrounding grassland ecology environment and major engineering projects.