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Landslides

, Volume 10, Issue 6, pp 785–799 | Cite as

Evaluation of the consistency of landslide susceptibility mapping: a case study from the Kankai watershed in east Nepal

  • Prabin Kayastha
  • Megh Raj Dhital
  • Florimond De Smedt
Original Paper

Abstract

GIS-based landslide susceptibility maps for the Kankai watershed in east Nepal are developed using the frequency ratio method and the multiple linear regression technique. The maps are derived from comparing observed landslides with possible causative factors: slope angle, slope aspect, slope curvature, relative relief, distance from drainage, land use, geology, distance from faults and mean annual rainfall. The consistency of the maps is evaluated using landslide density analysis, success rate analysis and spatially agreed area approach. The first two analyses produce almost identical quantitative results, whereas the last approach is able to reveal spatial differences between the maps and also to improve predictions in the agreed high landslide-susceptible area.

Keywords

Landslide susceptibility Frequency ratio Multiple linear regression Landslide density Success rate Spatially agreed area Nepal 

Notes

Acknowledgments

The Department of Survey, the Department of Hydrology and Meteorology and the Department of Mines and Geology, Government of Nepal, provided data used in this study. The Flemish Inter-University Council (VLIR), Belgium, provided a Ph.D. scholarship for the first author to carry out this research. The authors would also like to acknowledge the anonymous reviewers for their constructive suggestions.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Prabin Kayastha
    • 1
    • 2
  • Megh Raj Dhital
    • 2
    • 3
  • Florimond De Smedt
    • 1
  1. 1.Department of Hydrology and Hydraulic EngineeringVrije Universiteit BrusselBrusselsBelgium
  2. 2.Mountain Risk Engineering UnitTribhuvan UniversityKathmanduNepal
  3. 3.Central Department of GeologyTribhuvan UniversityKathmanduNepal

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