Landslides

, Volume 1, Issue 1, pp 73–81 | Cite as

Landslide susceptibility mapping using GIS-based weighted linear combination, the case in Tsugawa area of Agano River, Niigata Prefecture, Japan

  • Lulseged Ayalew
  • Hiromitsu Yamagishi
  • Norimitsu Ugawa
Original Paper

Abstract

A spatial database of 791 landslides is analyzed using GIS to map landslide susceptibility in Tsugawa area of Agano River. Data from six landslide-controlling parameters namely lithology, slope gradient, aspect, elevation, and plan and profile curvatures are coded and inserted into the GIS. Later, an index-based approach is adopted both to put the various classes of the six parameters in order of their significance to the process of landsliding and weigh the impact of one parameter against another. Applying primary and secondary-level weights, a continuous scale of numerical indices is obtained with which the study area is divided into five classes of landslide susceptibility. Slope gradient and elevation are found to be important to delineate flatlands that will in no way be subjected to slope failure. The area which is at high scale of susceptibility lies on mid-slope mountains where relatively weak rocks such as sandstone, mudstone and tuff are outcropping as one unit.

Keywords

Landslide Susceptibility GIS Agano River Japan 

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Lulseged Ayalew
    • 1
  • Hiromitsu Yamagishi
    • 1
  • Norimitsu Ugawa
    • 1
  1. 1.Department of Environmental ScienceNiigata UniversityNiigata CityJapan

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