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Assessment of landslide risk and exposure rural settlements in Bazoft basin of Chaharmahal and Bakhtiari province
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Asghar Norouzi *   , Amirhosein Halabian |
| department of geography and rural planning, Payame Noor University, Tehran. Iran , a.norouzi@pnu.ac.ir |
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Abstract: (542 Views) |
bjective: The increase in natural hazards and the damage caused by them, especially with the expansion of human dispersion in all parts of the world, has made attention to this issue an international necessity. Landslides are one of these hazards, which usually affect settlements in mountainous areas, especially villages. The identification of vulnerable areas and their prediction in programmes, as well as the attempt to identify, introduce and take into account areas at risk, is a requirement for land planning and management and can reduce a large part of the threat of this hazard. Therefore, the aim of this study is to evaluate the landslide situation in the Bazoft basin using the AHP model and the application of Geographic Information System (GIS).
Method: The type of research is applied and the approach that governs it is analytical and quantitative. In order to assess the risk, slope, slope direction, geology, fault, land use, temperature and precipitation indices, distance from road, waterway and also distance from settlements were used. In order to assess the landslide risk, a hierarchical structure of criteria and sub-criteria was first drawn up. After preparing the desired maps, the weight of each criterion was calculated based on the AHP process. The factor layers were prepared using different sources such as 1:50,000 topographic map, 1:100,000 geological map and Landsat satellite images in the ArcGIS environment.
Results: The zonation of the basin in terms of landslide sensitivity was examined in five classes from "very low" to "very high" sensitivity in the final map. The highest sensitivities are found in the southern, central and northeastern parts of the basin.
Conclusions: In terms of area, 10.15% of the basin is "very high risk", 22.24% is "high risk", 27% is "moderate risk", 27.61% is "low risk" and only 13% is "very low risk". The results also showed that out of the 219 settlements in the basin, about 23% are in the "very high risk" range and only 19% are in the "very low risk" range; this is considered a serious threat to the inhabitants and it is necessary to take measures related to the conditions of each of them. |
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| Keywords: Landslide, Rural settlements, AHP, GIS, Bazoft |
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Full-Text [PDF 1498 kb]
(112 Downloads)
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Type of Study: Research |
Subject:
سکونتگاههای شهری و روستایی
Received: 2023/09/15 | Accepted: 2024/12/18 | Published: 2024/12/18
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