中文摘要：

新疆若羌湖泊群位于新疆若羌县城北部，罗布庄东西两侧的塔克拉玛干沙漠东南缘，应用1973—2006年Landsat MSS、TM、ETM＋以及中巴卫星等高分辨率的遥感数据和250m分辨率的MODIS数据监测湖泊群动态变化特征，结果表明：自2002年以来，湖泊面积有较为显著的增加趋势，2003年初到2004年春季以及2005年底到2006年春季湖泊持续保持大的湖水面积，高分辨率卫星资料显示，2003年7月22日湖水面积达到最大值181，8km^2，利用高分辨率单点结果验证时间系列粗分辨率结果表明，基于250m分辨率MODIS数据反演的湖泊面积有较高精度，MODIS数据显示湖水面积最大可达295km，但是其精度还需要更多的高分辨率遥感影像进一步验证，初步的成因分析表明，气温升高导致冰川消融增加，从而引起河流径流的变化和洪水的暴发，强天气过程带来的大量降水也引发特大山洪或者超灾害洪水，特别是车尔臣河在短时间内向湖泊群区泄人大量洪水，是形成湖泊面积扩大的原因之一，时间上主要体现在夏季和秋季，自2000年以来的塔里木河多次生态输水也可能是形成大面积湖泊群的另一原因，但时间上主要体现在冬季和春季，沙漠地区的高蒸发量则是导致湖泊面积迅速缩小的原因。

英文摘要：

Ruoqiang lake groups are located in the southeastern margin of Taklimakan Desert, which is an extreme arid area in the South Xinjiang Region, China. It is about 60 km north of Ruoqiang County seat and on the east and west sides of Luobuzhuang. The high spatial resolution satellite data during 1973 to 2006, including Landsat MSS, TM, ETM＋, CBERS CCD, and the MODIS images with 250 m spatial resolution were used to monitor the dynamic change of the Ruoqiang lake group. The monitor results indicate that the lake area has being significantly increasing after 2002. Large lake area was seen from the early 2003 to the spring 2004 and from the end of 2005 to the spring 2006. The maximum area reached 181.8 km^2 on 22 July 2003 based on the available high spatial resolution data. Based On high spatial resolution data, it is validated that the time series of retrieval result based on 250 m MODIS data has a high accuracy. The maximum lake area can reach 295 km^2 based on 250 m MODIS data. But the accuracy needs a further verification by using more high spatial resolution data. An elementary analysis of cause of formation indicates that floods from the Qarqan River and Ruoqiang River are the principal cause for the lake area expansion. The increasing glacier ablation due to the increasing air temperature and suddenly heavy precipitation increases river runoff and induces flood. Flood results in expansion of lake area, which occurs mainly in summer and autumn. The ecologic water conveyance to the lower reaches of Tarim River is another pronounced factor for the expansion of lake area. But its effect mainly occurs in spring and winter. The very high evaporation in desert regions results in a rapid contraction of lake area.