The study of the time effect of bank collapse by physical modeling;

The main destroy form of the reservoir bank was bank collapse.

There is severe bank collapse in the reach of Tongguan to Sanmenxia in the Sanmenxia reservoir area of the Yellow River owing to influences of incoming water and sediment as well as the reservoir operation model.

Upon impoundment,the long-term immersion and wave erosion in reservoir water will give rise to the settlement of railway subgrade,bank slump and reconstruction of bank slope that endangers the safety of railway operation.

Each spot, bank slump is 0.

Serious bank caving occurs along the rivers,and a large area of land was washed away.

, this dissertation gives the detailed theoretical and experimental researches on characteristics, process and mechanism of the bank failure in the alluvial river by means of the field investigation, the data analysis and the model experiment.

It also uses the theory of slope stability of soil mechanics to simulate bank failure and deformation.

Reservoir bank collapse is orie of the most important geological disasters, which influence the security of iirimigration engineering in the reservoir area of the Three Gorges project, It is of most importance for nonnal opera-tion of the Three Gorges project to protect reservoir bank collapse systemalically.

It is of most importance for normal operation of the Three Gorges project to prevent reservoir bank collapse systematically.