Landslide Susceptibility Mapping Using Weighted-Overlay Approach in Rangamati, Bangladesh

Terrestrial Environmental Sensitivity Index Mapping (TESIM) of the Coastal Areas of the Niger Delta Region of Nigeria

“…Because AHP maintains a consistency ratio at each step, the method tends to be more reliable than other available techniques (Azem et al, 2021;Abdekareem et al, 2022;Bilgilioglu et al, 2022;Khatun et al, 2022). The method is efficient and effective in that the relative importance of each variable, factor or criterion in an analysis or study is assigned weights or scores based on expert judgement and relative importance of the variables or factors under consideration (Chen, 2022).…”

“…The level of final influence is obtained by multiplying the cell values of each input raster by the raster's weight of importance. This weighted value represents the actual scenario of the research area (Khatun et al, 2022). The weighted overlay approach is a widely used knowledge-based empirical method employed in the present study, which is "the terrestrial GIS based multi-criteria analysis was adopted in this work because it possesses the needed tools and analytical capabilities that fit the goals of the research.…”

A review on landslide susceptibility mapping research in Bangladesh

“…Due to excessive and prolonged rainfall [ 5 ] driven by climate change [ 6 ], unplanned development activity, hill cutting, deforestation, urban growth driven by increased population pressure [ 2 , 5 , 7 ], landslides have become a regular phenomenon in the southeastern hilly areas of Bangladesh [ 4 , 5 ]. There are five administrative districts comprised of small to large hills in the southeastern part of the country namely Chattogram, Cox's Bazar, Rangamati, Khagrachhari and Bandarban known as Chattogram Hilly Areas ( Fig.…”

“…Landslide susceptibility maps in Bangladesh were prepared using landslide inventory data [ 6 , 7 , 17 , 18 ]. Landslide inventory is one of the first steps in landslide susceptibility, hazard and risk assessment [ 19 , 20 ].…”

“…According to the scale of the study, a landslide can be mapped as a point or polygon using different techniques such as field mapping, satellite imagery and interpretation of aerial photographs [ [20] , [21] , [22] , [23] ]. In Bangladesh, landslide inventory is prepared either single method such as SAR offset tracking techniques [ 18 ], google image interpretation [ 6 ] and field surveys [ 7 , 17 ] or by a combination of methods [ 20 ] or open source data was used [ 24 ]. Inventory data had been used to measure the weight of conditioning factors by encompassing several types of mathematical models to predict landslide susceptibility in Bangladesh.…”