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. 2023 Jul;30(31):77830-77849.
doi: 10.1007/s11356-023-27799-0. Epub 2023 Jun 2.

Land subsidence susceptibility mapping: comparative assessment of the efficacy of the five models

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Land subsidence susceptibility mapping: comparative assessment of the efficacy of the five models

Lei Zhang et al. Environ Sci Pollut Res Int. 2023 Jul.

Abstract

Land subsidence (LS) as a major geological and hydrological hazard poses a major threat to safety and security. The various triggers of LS include intense extraction of aquifer bodies. In this study, we present an LS inventory map of the Daumeghan plain of Iran using 123 LS and 123 non-LS locations which were identified through field survey. Fourteen LS causative factors related to topography, geology, hydrology, and anthropogenic characteristics were selected based on multi-collinearity test. Based on the results, five susceptibility maps were generated employing models and input data. The LS susceptibility models were evaluated and validated using the receiver operating characteristic (ROC) curve and statistical indices. The results indicate that the LS susceptibility maps produced have good accuracy in predicting the spatial distribution of LS in the study area. The result showed that the optimization models BA and GWO were better than the other machine learning algorithm (MLA). In addition, The BA model has 96.6% area under of ROC (AUROC) followed by GWO (95.8%), BART (94.5%), BRT (93.1%), and SVR (92.7%). The LS susceptibility maps formulated in our study can serve as a useful tool for formulating mitigation strategies and for better land-use planning.

Keywords: Daumeghan plain; Gray wolf optimizer; Machine learning; Optimization model; Susceptibility.

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