Landslides Susceptibility Analysis of Delibekirli (Kırıkhan/Hatay) Basin By Analytical Hierarchy Process (AHP)

Abstract

The economic and human losses, caused by landslides, are related with processes of different origins and scales is quite high. Detecting the potential of landslides that may occur in any area and considering these determinations in land use plans will prevent possible losses due to landslides. In this study, Delibekirli basin, which covers an area of approximately 52 km2, located in the middle of the Amanos Mountains, was examined in terms of its natural and human characteristics that may be related to landslides. The lowest point is 170 m and the highest point is 1795 m. In addition to these high relief values, the area covered by lithologically different rocks is tectonically fragmented by many faults. The geomorphological development of the Delibekirli basin, which has a rich vegetation diversity with an annual precipitation of 579 mm and an average temperature of 21.1°C (according to Kırıkhan meteorology station data) continues under the influence of tectonism, karstification, stream erosion, climate, vegetation and hydrographic processes and anthropogenic processes. In this study, it was aimed to perform landslide susceptibility analysis for the basin and the Analytical Hierarchy Process (AHP) method was used. Stream network, tectonism, slope, aspect, elevation, slope shape, NDVI, soil, climatic features, distance to the roads, land use and lithological features were selected as input data. According to the Analytical Hierarchy Process, the landslide susceptibility of the Delibekirli Basin is 32,1% for the fall type in medium, high and very high grade landslides; for the slip type it is 30,2%. The overlap of field observation findings with the results of the AHP method supports the reliability and applicability of the method.