Landslide susceptibility mapping at Lebir and Galas River Basins after extreme flood event using weights of evidence

Mohd Hairil Mohd, . and Faten Nur Umaira Zainal Azman, . and Ahmad Jusoh, . and Mohd Asamudin A. Rahman, . Landslide susceptibility mapping at Lebir and Galas River Basins after extreme flood event using weights of evidence. pp. 103-115. ISSN 1823-8556

Landslides are natural disasters that cause a significant negative impact on the loss of life property infrastructure organization industry and the environment. Continuous and heavy precipitation triggered a large landslide at the Lebir and Galas River basins on end of the year 2014. The landslide debris rapidly turned into a high volume debris flow that was deposited into the river which may cause serious damage to the nearby infrastructures. The purpose of this study is to develop a landslide inventory map to identify the critical and prone area and to produce a landslide susceptibility map for the Lebir and Galas River Basin after an extreme flood event on 2014. Landslides area was identified from aerial photograph interpretation SPOT 5 Satellite Images and extensive field studies. Ten factors were used to generate landslide susceptibility map including slope aspect geology (lithology) land use precipitation distance to drainage distance to road distance to fault soil depth and Normalized Difference Vegetation Index (NDVI). The landslides conditioning factors were mapped into ArcGIS converted from vector to raster maps and analysed using Weights of Evidence (WOE) method. The importance of each factor was indicated by weight Wi where positive Wi indicates the factor is favourable for the occurrence of landslides and vice versa. The result shows that distance to fault acquired the highest weight among other parameters (2.255814) followed by land use (1.031512) and geology (0.847892). The combination of 10 factors layer with a landslide inventory produced landslide susceptibility map.

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Abstract

Landslides are natural disasters that cause a significant negative impact on the loss of life property infrastructure organization industry and the environment. Continuous and heavy precipitation triggered a large landslide at the Lebir and Galas River basins on end of the year 2014. The landslide debris rapidly turned into a high volume debris flow that was deposited into the river which may cause serious damage to the nearby infrastructures. The purpose of this study is to develop a landslide inventory map to identify the critical and prone area and to produce a landslide susceptibility map for the Lebir and Galas River Basin after an extreme flood event on 2014. Landslides area was identified from aerial photograph interpretation SPOT 5 Satellite Images and extensive field studies. Ten factors were used to generate landslide susceptibility map including slope aspect geology (lithology) land use precipitation distance to drainage distance to road distance to fault soil depth and Normalized Difference Vegetation Index (NDVI). The landslides conditioning factors were mapped into ArcGIS converted from vector to raster maps and analysed using Weights of Evidence (WOE) method. The importance of each factor was indicated by weight Wi where positive Wi indicates the factor is favourable for the occurrence of landslides and vice versa. The result shows that distance to fault acquired the highest weight among other parameters (2.255814) followed by land use (1.031512) and geology (0.847892). The combination of 10 factors layer with a landslide inventory produced landslide susceptibility map.

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Item Type:	Article
AGROVOC Term:	Landslides
AGROVOC Term:	Natural disasters
AGROVOC Term:	Inventories
AGROVOC Term:	Mapping
AGROVOC Term:	Geographic information systems
AGROVOC Term:	Aerial photography
AGROVOC Term:	Sloping land
AGROVOC Term:	Geology
AGROVOC Term:	Land use
AGROVOC Term:	Precipitation
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8111

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