PMID- 37004487 OWN - NLM STAT- MEDLINE DCOM- 20230418 LR - 20230418 IS - 1095-8630 (Electronic) IS - 0301-4797 (Linking) VI - 338 DP - 2023 Jul 15 TI - Multi-variable approach to groundwater vulnerability elucidation: A risk-based multi-objective optimization model. PG - 117842 LID - S0301-4797(23)00630-8 [pii] LID - 10.1016/j.jenvman.2023.117842 [doi] AB - Groundwater vulnerability mapping is essential in environmental management since there is an increase in contamination caused by excessive population growth. However, to our knowledge, there is rare research dedicated to optimizing the groundwater vulnerability models, considering risk conditions, using a robust multi-objective optimization algorithm coupled with a multi-criteria decision-making model (MCDM). This study filled this knowledge gap by developing an innovative hybrid risk-based multi-objective optimization model using three distinguished models. The first model generated two series of scenarios for rate modifications associated with two common contaminations, Nitrate and Sulfate, based on susceptibility index (SI) and DRASTICA models. The second model was a multi-objective optimization framework using non-dominated sorting genetic algorithms- II and III (NSGA-II and NSGA-III), considering uncertainties in the input rates by the conditional value-at-risk (CVaR) technique. Finally, the third model was a well-known MCDM model, the COmplex PRoportional ASsessment (COPRAS), which identified the best compromise solution among Pareto-optimal solutions for weights of the contaminations. Regarding the Sulfate's results, although the optimized DRASTICA model led to the same correlation as the initial model, 0.7, the optimized SI model increased the correlation to 0.8 compared to the initial model as 0.58. For the Nitrate, both the optimized SI and the optimized DRASTICA models raised the correlation to 0.6 and 0.7 compared to the initial model with a correlation value of 0.36, respectively. Hence, the best and the lowest correlation among the optimized models were between SI and Sulfate concentration and SI and Nitrate concentration, respectively. CI - Copyright (c) 2023 Elsevier Ltd. All rights reserved. FAU - Zare, Masoumeh AU - Zare M AD - Department of Civil and Environmental Engineering, Shiraz University, Shiraz, Iran. Electronic address: masoumezare86@gmail.com. FAU - Nikoo, Mohammad Reza AU - Nikoo MR AD - Department of Civil and Architectural Engineering, Sultan Qaboos University, Muscat, Oman. Electronic address: m.reza@squ.edu.om. FAU - Nematollahi, Banafsheh AU - Nematollahi B AD - Department of Environmental Sciences, University of California, Riverside, USA. Electronic address: bnema001@ucr.edu. FAU - Gandomi, Amir H AU - Gandomi AH AD - Faculty of Engineering and IT, University of Technology Sydney, NSW, 2007, Australia; University Research and Innovation Center (EKIK), Obuda University, 1034, Budapest, Hungary. Electronic address: gandomi@uts.edu.au. FAU - Farmani, Raziyeh AU - Farmani R AD - Centre for Water Systems, Department of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom. Electronic address: R.Farmani@exeter.ac.uk. LA - eng PT - Journal Article DEP - 20230331 PL - England TA - J Environ Manage JT - Journal of environmental management JID - 0401664 RN - 0 (Nitrates) SB - IM MH - *Nitrates/analysis MH - Algorithms MH - *Groundwater MH - Uncertainty OTO - NOTNLM OT - Complex proportional assessment (COPRAS) technique OT - Groundwater vulnerability map OT - Land use-based index model OT - Multi-criteria decision-making (MCDM) model OT - Non-dominated sorting genetic algorithm- II and III (NSGA-II and NSGA-III) COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/04/03 06:00 MHDA- 2023/04/18 06:41 CRDT- 2023/04/02 18:11 PHST- 2022/09/26 00:00 [received] PHST- 2023/01/10 00:00 [revised] PHST- 2023/03/28 00:00 [accepted] PHST- 2023/04/18 06:41 [medline] PHST- 2023/04/03 06:00 [pubmed] PHST- 2023/04/02 18:11 [entrez] AID - S0301-4797(23)00630-8 [pii] AID - 10.1016/j.jenvman.2023.117842 [doi] PST - ppublish SO - J Environ Manage. 2023 Jul 15;338:117842. doi: 10.1016/j.jenvman.2023.117842. Epub 2023 Mar 31.