Reservoir-landslide Hazard Assessment Based on GIS： A Case Study in Wanzhou Section of the Three Gorges Reservoir

Reservoir-landslide is mainly caused by changes in hydrodynamic conditions of slope interior at the time of water storage or discharge. The current study mainly focuses on the typical reservoir landslide, but the sudden occurrence of some unknown landslides brought a lot of difficulties for hazards...

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Bibliographic Details
Published in:Journal of mountain science 2013-12, Vol.10 (6), p.1085-1096
Main Authors: Wang, Meng, Qiao, Jian-ping
Format: Article
Language:English
Subjects:
Earth and Environmental Science
Earth Sciences
Ecology
Environment
Geographic information systems
Geography
GIS
Hazards
Landslides & mudslides
Reservoirs
Risk assessment
Slope stability
万州
三峡水库
危险性评估
敏感性评价
水库滑坡
灾害评价
边坡稳定性
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Summary:Reservoir-landslide is mainly caused by changes in hydrodynamic conditions of slope interior at the time of water storage or discharge. The current study mainly focuses on the typical reservoir landslide, but the sudden occurrence of some unknown landslides brought a lot of difficulties for hazards prevention. Therefore, we proposed a method to evaluate the regional scale reservoir-landslide hazard. We took Wanzhou section of Three Gorges Reservoir （China） as the study area and systemically and synthetically carried out the reservoir-landslide hazard evaluation under the condition of water level regulation. Firstly, we made reservoir-landslide susceptibility assessment by using the methods of spatial analysis and statistics based on geological and geomorphological materials and field survey data, and then, analyzed the regional-scale slope stability based on the infinite slope model used to analyze the bank slope stability change under the condition of water fluctuation, finally, developed a reservoir-landslide hazard evaluation model based on the results of susceptibility and stability. The hazard evaluation model was used to predict and evaluate the hazard change under the role of water level regulation. The results showed that the landslide hazard of the whole region decreased during water storage, landslide hazards increased during water discharge. The faster the regulation speed, the greater the slope hazard. The results can provide the basis for hazard management and regional land-use planning.
ISSN:1672-6316
1993-0321
1008-2786
DOI:10.1007/s11629-013-2498-7