Geological Hazard Risk Study Of The Gongguoqiao Hydropower Station

Gongguoqiao-powerstation on the Lancang-river in yunnan province is kind of II water-power engineering with a dam height of 108 m and a capacity of 900,000 kilowatts. the normal water level is 1307m elevation, the reservoir backwater is about 42km. As the magnitude of the project, combined with dam, reservoir area covers a large and more complicated geological conditions, construction may be subject to existing geological disasters, as well as the construction itself may also lead to geological disasters. Paper first built-up areas to demonstrate the geological environmental conditions, specifically including meteorology, hydrology, topography, lithology, and rock group of engineering geology, geological structure andregional stability, hydro-geological and engineering geological conditions, human engineering activities status. On the distribution of geological hazards within the construction site, type and basic features. The project area landslides, avalanches, landslides and other geological disasters, the environmental conditions of the formation, size, make a risk assessment of the status quo. Then by evaluating the construction-induced, increased the possibility of geological disasters to assess the construction itself may be subjected to risk of geological hazards, in this based on the prevention and treatment initiatives. Analysis, construction project site at the construction project, most of the erosion of alpine zone, complex terrain conditions, lithologic facies changes, structural development, moderately complex hydrogeological conditions, geological hazards, disturbances of human engineering activities strong geological environmental conditions, geological conditions are very complicated. Status quo conditions, the possibility of geological disasters based mostly smaller. Hydropower construction and operation of the induced, increased geological disasters on the construction and operation of construction does not pose a threat. The risk of the project site area The results showed that the main venue for a small risk. Construction of site suitability as appropriate. On this basis, the overall reduction and prevention of geological disasters recommendations, the paper that, through engineering measures, biological measures to control measures such as management, project construction could be corresponding to alleviate suffering of geological disasters.In this paper, similar to the construction of large hydropower projects have practical significance.