Landslide Susceptibility Analysis Based On GIS And RS Technology In Changbai Mountain

Landslide is an important kind of geological hazard.With the rapid development of the social economy,it not only brings economic loss and casualties,but also destroys the residential area,lifeline engineering and ecological environment.The damage caused by the landslide to mankind is worldwide.In the economic development and construction of human society,the annual economic and human losses to the countries of the world are incalculable.Because of the influence of various natural conditions such as geographical position,location of land and sea,terrain,climate,soil and so on,various kinds of hazards exist in Changbai Mountain area.Especially landslide?collapse and debris flow were widespread in changbai mountain area,and the occurrence frequency and damage degree were increased year by year.But there were no effective methods to manage and predict the geologic hazards occurred in Changbai Mountain.The related research is limited to a certain landslide events,disaster information is scattered,not formed a system effectively.So it is necessary to analyze the landslide susceptibility using GIS and RS technology in changbai mountain area.It will help to improve the efficiency of the ability to predict and respond to various geological disasters.This study will analyze the space-time distribution features of landslide and draw the landslide inventory map using GISandRS in changbai mountain area.We primarily used AHPand ANN technology to further study the importance and correlation between each factor have influence on landslide in Changbai Mountain.Finally,we will use the database and landslide information system to analyze landslide susceptibility in changbai mountain area.It might play important role in developing hazard comprehensive management and forecasting system,and finally achieve the aim of prevention and reduction effect.Through the above research,we had the following conclusions:1)The PCA method for obtaining landslide hazard information using remote sensing technology is more effective than other methods.2)In order to effectively extract landslide hazard information,this study combines PCA supervised classification and GIS technology,and uses the definition of landslide conditions to classify.From the classification results,the method can effectively improve the accuracy of landslide hazard information acquisition.3)Based on the AHP and ANN method,five factors of slope,geology,soil,slope and land use were analyzed and weighted,the factor weights were 44%,24%,15%,7%,10%and 36%,18%,25%,6.25%and 14.25%respectively,which indicated that the slope,geology and soil 3 factors in this study had great influence on the landslide hazard.4)The analysis of the susceptibility map of landslide hazard zoning in Changbai mountain area shows that the extremely sensitive region(sensitivity ? 0.9)is mainly distributed in the forest areas near the china and north Korean borders in the regions of Jian city,Baishan city,Linjiang and Changbaicity.In Yanbian area,sensitive region mainly distributed in the border of Helong city,Antu county and Wangqing county.This shows that the susceptibility analysis method of landslide hazard in Changbai mountain area based on AHP and ANN is feasible,and the precision of the susceptibility zoning map obtained by ANN is higher than that of AHP.