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Risk assessment research on impulse wave generated by landslide in reservoir |
| HUANG Bolin1,2,YIN Yueping3 |
(1. Hubei Key Laboratory of Disaster Prevention and Mitigation,China Three Gorges University,Yichang,Hubei 443002,China;2. National Field Scientific Observation Station of Landslide in the Yangtze Three Gorges,Hubei Province,Yichang,
Hubei 443002,China;3. China Institute of Geo-environment Monitoring,Beijing 100081,China) |
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Abstract Many disastrous events of impulse waves generated by landslides have occurred in the Three Gorges Reservoir since its impoundment in 2003. This paper describes systematically the purpose,content and object of risk assessment for landslide induced impulse wave in reservoir for the first time and gives the definitions to the relevant concepts and establishes the technical frame with five phases,including the scope definition,hazard analysis,vulnerability analysis,risk estimation and risk division. The risk assessment process of impulse wave in reservoir and the products in every phase are demonstrated through the potential rockfall at Banbiyan in Wu Gorge of the Three Gorges Reservoir. The main risk receptors of landslide generated impulse wave at Banbiyan are ships in the waterway,with the potential maximum direct economic loss of thirteen thousand Yuan to anchored boats and possible two sailing ships capsized. There is a high risk area about three kilometers long suffering from the landslide generated impulse wave at Banbiyan in the Yangtze River. A quantitative risk assessment system for landslide induced impulse wave is beneficial to delineating the risk point or region suffering from the impulse wave disaster,and ranking the risk order of many potential landslide-induced impulse waves.
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