全球气候变暖，青藏高原地区的冰川、冻土几十年来持续退缩，对发源于该地区的长江流域水资源补给产生重要影响，进而影响长江流域的社会经济发展，对长江流域水资源量未来演变进行准确可靠的量化评估和预测，有重要的科学和现实意义。新的卫星对地观测（重力卫星GRACE、磁测卫星Swarm、测高卫星ICESat、InSAR）联合GPS定位技术为快速、实时、精确地获取大范围冰川三维变化和区域水储量变化提供了数据支持，本项目旨在联合利用多种不同的卫星观测数据，研究青藏高原地区冰川融化和长江流域的水储量变化，确定青藏地区近10年冰川消融以及长江流域水储量年变化速率，给出其间统计相关性和中长期变化趋势的量化分析结果，并对未来的演变作出推断和预警，为今后建立青藏高原地区冰川和长江流域水储量变化立体监测系统提供有效的技术手段和集成。

Global warming, the glaciers, permafrost of Qinghai-Tibet Plateau keep on melting for decades. It has an important influence on water resources supply in the region of the Yangtze Rive where is it originated. Furthermore, the social and economic development can also be affected. There is a important scientific and practical meaning of reliable and accurate quantitative assessment and prediction on the future evolution of the Yangtze River water resources quantity. New satellite observation of the Earth (gravimetric satellite GRACE,magnetic field mission Swarm, altimetry satellite ICESat,InSAR),combined with GPS positioning technology provide data support for obtaining information of three dimensional changes of wide range glaciers and local water storage change quickly, real time and accurately. This project aims at, by jointly using of a variety of satellite observation data, studying the glacial melting in Qinghai-Tibet plateau and water storage changes in Yangtze river basin, determining rate of glacial melting in Qinghai-Tibet region and rate of water storage change in Yangtze river basin, and providing effective techniques and integration for setting up three-dimensional monitoring system for glaciers in Qinghai-Tibet plateau and water storage change in Yangtze river basin in the future.