Study on the Mechanism of Bank Collapse and Prevention-Control Measures in China Three Gorges Reservoir Area

Abstract

Reservoir bank collapse results in vegetation destruction on bank, worsens soil - water loss, impacts local economic and environment. Therefore, attention should be attached to research of reservoir bank collapse mechanism and control measures. The impoundment and operation of China Three Gorges (CTG) reservoir largely changes hydrologic and geologic conditions of the reservoir bank, greatly influences the reservoir bank stability. On the base of summarizing the structure types of main bank and slope in the reservoir area, the typical bank collapse mode and mechanism in CTG reservoir area are analyzed, including erosion degradation type, sloughing type, sliding type and collapsing type. In the light of different material composition, correlative control and harnessing measures are put forward, which can be referred in the control and harnessing of bank collapse in the reservoir area.