Using Geographic Information System and Analytical Hierarchy Process in Landslide Hazard Zonation

Bharat Prashad Bhatt¹, Keshab Datt Awasthi¹, Binod Prasad Heyojoo², Thakur Silwal¹ and Gandhiv Kafle^3,

¹School of Agricultural Sciences, Department of Ichthyology and Aquatic Environment, University of Thessaly

²Department of Physics, University of Ioannina, Greece

³Department of Agronomy and Plant Breeding, Aboureihan Campus, University of Tehran, Tehran, Iran

Cite this paper:
Bharat Prashad Bhatt, Keshab Datt Awasthi, Binod Prasad Heyojoo, Thakur Silwal and Gandhiv Kafle. Using Geographic Information System and Analytical Hierarchy Process in Landslide Hazard Zonation. Applied Ecology and Environmental Sciences. 2013; 1(2):14-22. doi: 10.12691/aees-1-2-1

Abstract

Nepal frequently suffers from various types of water induced disasters like soil erosion, landslide, debris flow, flood etc. To mitigate the problem related to Landslides & Debris flow, Landslide Hazard zonation is important to quick and safe mitigation measures and make strategic planning for the future by identifying the most vulnerable areas and channelizing most of the protective measures and techniques to a more focused area. This study was carried out in Rupa watershed area of kaski district with the main objective of identifying the landslide triggering factors and making the landslide hazard zonation map of the study area. Analytical Hierarchy Process (AHP) and Geographic Information System (GIS) were entirely employed for the preparation of Landslide Hazard Zonation mapping. The main factors responsible for the occurrence of landslide was found to be slope, aspect, landcover, presence of roads and presence of river and streams. Among these factors, the presence of road factors had the prominent effect on landslide occurrence. Altogether 13 landslide events were recorded in the study area and among them most of the landslide events were seen in Rupakot Village Development Committee (VDC). The final landslide susceptibility map of the study area can help the development planners to know more about the area and disseminate their development project in accordance with the need base approach. Proper development plan, proper system of keeping the records of landslide events, broadcasting high susceptible zones for landslides, implementing appropriate conservation technology, giving instructions to the locals can help to minimize these kind of natural disasters.

Keywords:
landslide hazard AHP GIS

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