Evaluation of Groundwater Vulnerability in the Upper Kelkit Valley (Northeastern Turkey) Using DRASTIC and AHP-DRASTICLu Models

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dc.authoridYildirim, Umit/0000-0002-7631-7245
dc.contributor.authorYildirim, Umit
dc.date.accessioned2024-10-04T18:49:46Z
dc.date.available2024-10-04T18:49:46Z
dc.date.issued2023
dc.departmentBayburt Üniversitesien_US
dc.description.abstractThis study aimed to investigate groundwater vulnerability to pollution in the Upper Kelkit Valley (NE Turkey). For this purpose, vulnerability index maps were created using the generic DRASTIC and AHP-DRASTICLu models. The latter model was suggested by adding a parameter to the DRASTIC model and weighting its parameters with the analytical hierarchy process with the GIS technique. The results showed that areas with high and very high vulnerabilities are concentrated around the Kelkit Stream, which flows from east to west in the central part of the study area. In contrast, areas with low and very low vulnerability classes are located in the northern and southern parts of the study area. To validate the model results, a physicochemical characterization of groundwater samples and their corresponding vulnerability index values were statistically compared using the Spearman correlation method. In addition, the single-parameter sensitivity method was applied to analyze the models' sensitivities. Results revealed a stronger correlation between the vulnerability index values of the AHP-DRASTICLu model (compared to the DRASTIC model) in terms of sulfate (R-2 = 0.75) and chloride (R-2 = 0.76), while there was a slightly weaker correlation for the electrical conductivity (R-2 = 0.65) values of the groundwater samples. Sensitivity analysis indicated that the vadose zone, aquifer media, and land use are the most influential parameters responsible for the highest variation in the vulnerability index. Generally speaking, the results indicated that the AHP-DRASTICLu model performs better than the DRASTIC model for investigating groundwater vulnerability to pollution in the Upper Kelkit Valley.en_US
dc.description.sponsorshipBayburt University,en_US
dc.description.sponsorshipThis work was supported by the Research Fund of the Bayburt University, Project Number: 2022/69002-13.en_US
dc.identifier.doi10.3390/ijgi12060251
dc.identifier.issn2220-9964
dc.identifier.issue6en_US
dc.identifier.scopus2-s2.0-85164033526en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.3390/ijgi12060251
dc.identifier.urihttp://hdl.handle.net/20.500.12403/3278
dc.identifier.volume12en_US
dc.identifier.wosWOS:001014909300001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherMdpien_US
dc.relation.ispartofIsprs International Journal of Geo-Informationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectgroundwater vulnerabilityen_US
dc.subjectDRASTIC modelen_US
dc.subjectAHP-DRASTICLu modelen_US
dc.subjectGeographic Information Systemen_US
dc.subjectsingle-parameter sensitivity analysisen_US
dc.titleEvaluation of Groundwater Vulnerability in the Upper Kelkit Valley (Northeastern Turkey) Using DRASTIC and AHP-DRASTICLu Modelsen_US
dc.typeArticleen_US

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