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Due to the special geological and geographical conditions of the Three Gorges reservoir area , since ancient times is high landslide hazard prone areas , especially after the completion of the Three Gorges Dam and the Three Gorges reservoir area , the geological environment of the Three Gorges reservoir area have been seriously affected , the landslide disaster-prone . The landslide hazard not only damaged bridges and culverts, electricity, roads and other public facilities , blocked the Yangtze River waterway , and even serious threat to people's lives and property safety of the reservoir area . The use of GIS technology development Landslide Stability Evaluation System Based on GIS in the Three Gorges reservoir area , landslide safety factor , and then determine the stability of the landslide , and in combination with other information , effective early warning of landslide hazard and reduce casualties and property losses . Three Gorges Reservoir Landslide Stability Evaluation System based on GIS (single version) is an important part of the early warning command and control system of the Three Gorges Reservoir Area . Papers on GIS application in the Evaluation of Slope Stability technology background, space graphics , the combination of spatial data and attribute data , the overall design of the system , the system database design, system implementation and testing aspects of the study , design and development of a GIS-based stability Evaluation System of Three Gorges Reservoir system. The system uses GIS spatial analysis technology, give full consideration to the complex conditions of the groundwater , soil type , rock formations , seismic , atmospheric precipitation , overlay analysis of landslide cross-sectional view of space , safety factor calculation . The system contains commonly used in engineering Fellenius law stability evaluation method of the Bishop method Janbu law , the plane sliding method , the transfer coefficient method , Sarma method , wedge method and C, phi , C , phi geotechnical parameters anti- analysis methods, the landslide stability evaluation functions . System built to take the way of the underlying programming with independent copyright GIS spatial analysis platform, the system is short and pithy , fast , easy to install , and required less computer resources , connection of Access Orlace10g , SQL Server , and other mainstream database , without having to connect to the network . The stand-alone version of the system user-friendly landslide stability evaluation in the field network to facilitate users to quickly to determine the stability of the landslide .
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