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Application of Spatial Data Integration Based on the Likelihood Ratio Function nad Bayesian Rule for Landslide Hazard Mapping  

Chi, Kwang-Hoon (Geoscience Information Center, Korea Institute of Geoscience and Mineral Resources)
Chung, Chang-Jo F. (Geological Survey of Canada)
Kwon, Byung-Doo (Department of Earth Science Education, Seoul National University)
Park, No-Wook (Geoscience Information Center, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of the Korean earth science society / v.24, no.5, 2003 , pp. 428-439 More about this Journal
Abstract
Landslides, as a geological hazard, have caused extensive damage to property and sometimes result in loss of life. Thus, it is necessary to assess vulnerable areas for future possible landslides in order to mitigate the damage they cause. For this purpose, spatial data integration has been developed and applied to landslide hazard mapping. Among various models, this paper investigates and discusses the effectiveness of the Bayesian spatial data integration approach to landslide hazard mapping. In this study, several data sets related to landslide occurrences in Jangheung, Korea were constructed using GIS and then digitally represented using the likelihood ratio function. By computing the likelihood ratio, we obtained quantitative relationships between input data and landslide occurrences. The likelihood ratio functions were combined using the Bayesian combination rule. In order for predicted results to provide meaningful interpretations with respect to future landslides, we carried out validation based on the spatial partitioning of the landslide distribution. As a result, the Bayesian approach based on a likelihood ratio function can effectively integrate various spatial data for landslide hazard mapping, and it is expected that some suggestions in this study will be helpful to further applications including integration and interpretation stages in order to obtain a decision-support layer.
Keywords
spatial integration; Bayesian; likelihood ratio; future landslide hazard;
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Times Cited By KSCI : 1  (Citation Analysis)
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