The Guanting Reservoir will be the second water resources of Beijing for drinking

but the alluvial problem 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 geocorrecting and radiometric normalization

principal 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 spatial 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 balance shoreline. The affects of the above-mentioned factors to the water resources in the Reservoir 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°