GIS based statistical and physical approaches to landslide susceptibility mapping (Sebinkarahisar,Turkey) |
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Authors: | Işık Yilmaz Inan Keskin |
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Affiliation: | (1) Faculty of Engineering, Department of Geology, Cumhuriyet University, 58140 Sivas, Turkey |
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Abstract: | The case study presents GIS-aided statistically and physically based landslide susceptibility mapping in the landslide-prone
Avutmus district of Sebinkarahisar (Giresun, Turkey). Field investigations, analysis of geological data and laboratory tests
suggested that two important factors have acted together to cause sliding: ground water pressures and toe erosion. Frequency
ratio (FR) and stability index mapping (SINMAP) were used to create the landslide susceptibility maps based on a landslide
inventory; distance from drainage systems, faults and roads; slope angle and aspect; topographic elevation and topographical
wetness index; and vegetation cover. Validation of the models indicated high quality susceptibility maps with the more realistic
results were obtained from the statistically based FR model. |
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