In combination with the conditions of engineering geology of Tiansan landslide at Kala hydropower station on the Yalong River

the influence of formation and surge of landslide are studied.Based on the summary of the experimences and lessons from practices of landslide surge early-warning at home and abroad

with the study on the motion process of landslide

velocity and variation rules of surge undulation are analyzed.According to the research

under the precondition of certain initial velocity and depth of reservoir

Tiansan landslide has the characters of great initial surge height and climbing height

especially the monitoring and predication work must be reinforced under the condition of drawdown.Aiming at the dam sites scheme comparison

it is suggested that the lower dam site plan is better to be taken and the resisting surge wave shock should be considered in dam site design.Combining the characteristic of project

the primary job is the location selection work of the project supporting facilities.