Journal
ENVIRONMENTAL EARTH SCIENCES
Volume 65, Issue 6, Pages 1705-1714Publisher
SPRINGER
DOI: 10.1007/s12665-011-1148-z
Keywords
Landslide susceptibility mapping; Entropy; Trapezoidal fuzzy number weighting; Weighted linear combination; Guizhou; China
Funding
- National Basic Research Program of China [2011CB 710601]
- Ministry Communication, China [2009318000074]
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The purpose of this study is to present a weighting method, integrating subjective weight with objective weight, for landslides susceptibility mapping based on geographical information system (GIS). First, the landslide inventory, aspect, slope, proximity to streams of drainage network, proximity to railway, proximity to road, topography, elevation, lithology, tectonic activity and annual precipitation, including their subclasses, were taken as independent landslide causal factors. Second, objective weights of the causal factors were calculated according to the landslide area density based on entropy weighting method, and key factors were selected according to the rank of the objective weights. Third, trapezoidal fuzzy number weighting approach was used to assess the sub-classes of each key factor. Finally, a case study was carried out in Guizhou province, China. A landslide susceptibility map was created using weighted linear combination model based on GIS. Using a predicted map of probability, the study area was classified into four categories of landslide susceptibility: low, moderate, moderate-high, and high.
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