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Assessing the vulnerability of Iran to subsidence hazard using a hierarchical FUCOM-GIS framework

Sadeghi, H ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1016/j.rsase.2023.100989
  3. Publisher: Elsevier B.V , 2023
  4. Abstract:
  5. In engineering practice, land subsidence is considered a threat to the infrastructure and lifelines massively distributed globally. In this study, a combined methodology of full consistency decision-making (FUCOM) and the geographical information system (GIS) was employed to assess the vulnerability of Iran to subsidence. Accordingly, a new hierarchical FUCOM-GIS framework was developed. The FUCOM was first used to evaluate the weight of various causative factors. Afterward, the GIS was employed to superimpose several layers to produce a land subsidence susceptibility map (LSSM) of Iran. The results revealed water stress, groundwater depletion, soil type, geological time scale, and rainfall amount as the most significant factors causing land subsidence, while the influence of several additional factors was also investigated. The LSSM was validated against interferometric synthetic aperture radar (InSAR) analyses of the Sentinel-1 for several megacities. Accordingly, Tehran, Qom, Yazd, Isfahan, Kerman, and Mashhad were recognized as the critical regions, delivering a subsidence rate between 15 and 20 cm/yr. Eventually, the assessed hazard for the power transmission lines and substations, as an exemplified lifeline, was confirmed by field reconnaissance. The results revealed the pier sinking, structural members buckling, electric insulators deviation, and cracking as the main damages to the transmission lines. © 2023 Elsevier B.V
  6. Keywords:
  7. Decision making ; Hazard assessment ; InSAR ; Land subsidence ; Lifelines
  8. Source: Remote Sensing Applications: Society and Environment ; Volume 31 , 2023 ; 23529385 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S235293852300071X