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Application of Likelihood Ratio and Logistic Regression Models to Landslide Susceptibility Mapping Using GIS

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  • Saro Lee

    (Korea Institute of Geoscience & Mineral Resources (KIGAM), Geoscience Information Center)

Abstract

For landslide susceptibility mapping, this study applied and verified a Bayesian probability model, a likelihood ratio and statistical model, and logistic regression to Janghung, Korea, using a Geographic Information System (GIS). Landslide locations were identified in the study area from interpretation of IRS satellite imagery and field surveys; and a spatial database was constructed from topographic maps, soil type, forest cover, geology and land cover. The factors that influence landslide occurrence, such as slope gradient, slope aspect, and curvature of topography, were calculated from the topographic database. Soil texture, material, drainage, and effective depth were extracted from the soil database, while forest type, diameter, and density were extracted from the forest database. Land cover was classified from Landsat TM satellite imagery using unsupervised classification. The likelihood ratio and logistic regression coefficient were overlaid to determine each factor’s rating for landslide susceptibility mapping. Then the landslide susceptibility map was verified and compared with known landslide locations. The logistic regression model had higher prediction accuracy than the likelihood ratio model. The method can be used to reduce hazards associated with landslides and to land cover planning.

Suggested Citation

  • Saro Lee, 2004. "Application of Likelihood Ratio and Logistic Regression Models to Landslide Susceptibility Mapping Using GIS," Environmental Management, Springer, vol. 34(2), pages 223-232, August.
    • Handle: RePEc:spr:envman:v:34:y:2004:i:2:d:10.1007_s00267-003-0077-3
    DOI: 10.1007/s00267-003-0077-3
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