Hazard forecasting of regional landslide hazards based on GIS |
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| Authors: | ZHANG Gui-rong YIN Kun-long CHEN Li-xia |
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| Institution: | 1. Geotechnical Engineering Department of Nanjing Hydraulic Research Institute, Nanjing 210024, China; 2. Engineering Faculty,
China University of Geosciences, Wuhan 430074, China |
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| Abstract: | Based on GIS, hazard forecasting of regional landslide hazards is studied; and the hazard zonation map is obtained, which presents the basic information for risk prediction and real-time alarm of landslide hazards. On the platform of MAPGIS software, professional module of information model for landslide hazards spatial forecasting and evaluation is obtained through customized development. By using the module, history and present landslide hazard risk are assessed separately in Yongjia County of Zhejiang Province using the data of history hazards and new hazards happened in 2004 of the county. Therefore ,we can believe that the evaluation model can be tested by history hazard zonation map coupled with new hazards. And it is tested that the new landslide hazards with accurate locations happened during the 3 times of typhoon (Rananim, Haitang and Matsa ) period of 2004 and 2005, which indicates that the evaluation model has great practicality and availability. At the same time, zonation classes obtained by statistic method of history hazards coupled with the method of fast clustering analysis, which conquers the disadvantages in zonation, are more scientific and more objective. |
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| Keywords: | landslide hazards hazard forecasting Information model GIS disaster prevention fast clustering typhoon |
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