利用TM卫星多时相数据，采用变化探测技术研究了官厅水库1988—2001年时间段库区边岸的动态变化。对库区淤积、边岸侵蚀等问题进行了探讨；结合水位差数据，提出边岸坡度和边岸稳定性的遥感时空分析方法和判据；分析了上述问题对官厅水库水资源利用的影响。边岸稳定性判别方法可应用于湖泊、海洋的滩涂地区。

The Guanting Reservoir will be the second water resources of Beijing for drinking,but the alluvial prpblem has been puzzling for decades.The paper studied the shoreline dynamic evolution of the Guanting Reservoir from 1988 to 2001 using change detection technique,with multitemporal Landsat TM data(1988,1994,2001).After geocoeercting and radiometric normalization,princioal component analysis and global change detection method was used.Several problems,such as reservoir silting,shoreline types etc.,have been discussed. The remotely sensed temporal and soatial analytic method to shoreline slope and shoreline stability discriminant have been presented,according to the relationship of proportion between the width of change detections and difference of water level on shoreline,With this method,shorelines were chassified to 3 types,alluvial,erosive,as well as bakance shoreline.The affects of the above-mentionef gactors to the water resources in the Resrroir have been analyzed,The shoreline stability discriminant will be applicable potentially on the low-lying beach areas of ocean and lake,andgle between 0.001-0.1°.