On the geological disasters of landslide and feature of typical landslides along the bank of the Baozhusi reservoir,Sichuan,China

Since the Baozhusi reservoir in Sichuan of China stores water,because of the combined action of the rainstorm and the repeated raising and falling of the water in the reservoir,the wholescale geological disasters,such as landslips and mudflows,have occurred along the bank of Baozhusi reservoir.The landslides have serious influences on the economic development and social stabilization of the areas around the reservoir,because many communication projects,communication and electric power facilities,newly-built immigration market towns and immigration houses were destroyed.Based on the investigated and tested data from the field,the distribution feature,types,formation condition and mechansim,sliding situation and potential disaster of the landslides around the reservoir are deeply analyzed in this paper.Meantime,the environmental geological conditions and stability of the bank slopes around the reservoir are evaluated so as to provide the foundation for the government to formulate the district economic development plan around reservoir.The analysis indicates that the Quaternary dilapidation and collapse accumulations along the bank of the reservoir show obvious deformation and slip in the process from its stable limit status under natural conditions to new stable status under the action of the reservoir's water,and the deformation and slip phenomena are the results from the loosen structure of the accumulation and its steep dipping surface,the repeated raising and fall action of the reservoir's water and construction of roads or houses.Many areas of the reservoir bank are less stable or less unstable if the whole bank of the reservoir is divided into stable areas,less stable areas,less unstable areas and unstable areas.