Landslide risk zoning using Analytic Hierarchy Process (AHP) and GIS technique (Case study; Baghmalek County)

Document Type : Research Article

Authors

• Morteza Lajmorak ¹
• zahra piri ²

¹ izeh iran-khuzestan

² Tabriz University

10.22067/geoeh.2022.77009.1239

Abstract

The phenomenon of landslides is one of the types of slip movements that has always caused a lot of damage in the country. Moving part of the sediment down the slope, in addition to financial losses, will lead to many life-threatening risks; Therefore, identifying areas that are prone to landslides can prevent this phenomenon as much as possible and save the lives and property of people at risk. The purpose of this study is to prioritize the effective components in the occurrence of landslides and zoning the risk of its occurrence in the city of Baghmalek. There are 9 factors for prioritizing and zoning landslide risk. These 9 factors are slope, geology, water drainage network, altitude, rainfall, land use, fault, slope direction and road. The method used in landslide zoning is AHP, and to integrate the layers, GIS software has been used. The results of this study indicate that the slope factor, land type and surface water network with one to third rank had the greatest impact and distance from the road and the slope direction with eighth and ninth rank also had the least impact on landslides in this area. Conclusions show that most of the landslides in the region were related to the slope and type of land; Because these factors, by interfering with the activities of the surface water network, rainfall and other mentioned factors, weaken the bond between the sediments and cause their movement. The most sensitive parts of the region were the southwest and parts of the east and west of the region and the most resistant parts of the region were the north, northwest and parts of the east of the region.

Keywords

• Zoning
• Landslide
• Analytic Hierarchy Process (AHP)
• GIS
• Baghmalek

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