Calibration and resolution effects on model performance for predicting shallow landslide locations in Taiwan

J.G.S. Keijsers, J.M. Schoorl, K.T. Chang, S.H. Chiang, L.F.G. Claessens, A. Veldkamp

Research output: Contribution to journalArticleAcademicpeer-review

28 Citations (Scopus)

Abstract

In this paper we optimise the spatially explicit prediction of landslide hazard, landslide triggering and subsequent movement downslope of materials for a mountainous catchment in Taiwan. The location prediction is optimised by subsequently adding three location parameters: rainfall distribution, land-use classes and DEM derived slopes. Then the three most important model parameters are calibrated to find the best prediction for both stable and unstable areas. The landslides predicted by the LAPSUS-LS model are compared with a landslide inventory to validate the output. The optimal model settings for the calibration area are then applied to a validation area. Results show that model performance can be improved by adding the spatial distribution of rainfall and by stratifying according to land-use classes. Landslide prediction is better with fine resolution DEMs, mainly because the local topography is smoothed in coarser resolutions. Although in general the amount of landslides is over-predicted, the overall performance indicates that the model is able to capture the important factors determining landslide location. Additional spatially distributed data such as regolith or soil depth and regeneration rates of the legacy effect can further enhance the model's prediction.
Original languageEnglish
Pages (from-to)168-177
JournalGeomorphology
Volume133
Issue number3-4
DOIs
Publication statusPublished - 2011

Keywords

  • rainfall-induced landslides
  • physically-based model
  • soil redistribution
  • hazard assessment
  • dem resolution
  • uncertainty
  • sediment
  • patterns
  • terrain
  • region

Fingerprint

Dive into the research topics of 'Calibration and resolution effects on model performance for predicting shallow landslide locations in Taiwan'. Together they form a unique fingerprint.

Cite this