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以2000~2012年MODIS数据为基础,采用改进的归一化差异水体指数对柴达木盆地主要湖泊的面积进行了计算。结果表明:盆地内湖泊面积总体呈扩大趋势。通过对气象与水文资料的分析,柴达木盆地近年来气温、降水量呈上升趋势,导致盆地内冰雪融水增多,内陆河流流量呈增加趋势,湖泊面积扩大。此外盐矿的开采也是影响湖泊面积的一个重要因素。
Based on the MODIS data from 2000 to 2012, the area of the main lakes in the Qaidam Basin was calculated using an improved normalized difference water index. The results show that the lake area in the basin shows an overall trend of expansion. Through the analysis of meteorological and hydrological data, the temperature and precipitation in the Qaidam basin have been on an upward trend in recent years, resulting in the increase of ice and snow meltwater in the basin, the increase of inland river flow and the expansion of the lake area. In addition, the exploitation of salt mines is also an important factor affecting the lake area.