Engineering Geology

Engineering Geology

Assessment of the contamination potential in the Northern Dezful-Andimeshk aquifer with emphasis on intrinsic and specific vulnerability

Authors
Sepideh Shakour
Manouchehr Chitsazan
Seyed Yahya Mirzaee
Earth Sciences Faculty, Shahid Chamran University of Ahvaz, Ahvaz, Iran
10.22034/JEG.2024.18.2.1019821
Abstract
One of the appropriate ways to prevent groundwater pollution is to identify vulnerable aquifer areas. The Dezful-Andimeshk Plain has two landfills that do not comply with the necessary standards for waste disposal and a river that recharges the aquifer, which can be potential pollutants for the aquifer. Therefore, evaluating the pollution potential of this aquifer is considered a necessity. To achieve this goal, for the first time in this area, the assessment of the aquifer pollution potential was carried out based on the intrinsic vulnerability (DRASTIC) and specific vulnerability (DLR), and finally, the potential contamination (PC) in the region was evaluated.. Based on the results, the value of the inherent vulnerability index ranges from 106 to 162 and has two vulnerability classes: moderate and high. The high vulnerability is related to the western margin of the plain and near the outlet of the plain, as well as in the middle of the plain with a northeast-southwest trend. The low vulnerability is associated with the northern and southern parts of the region. The specific vulnerability index ranges from 25 to 75, which, based on expert opinion, is classified into two classes: low and medium vulnerability. The highest intrinsic vulnerability is in the middle of the plain and around the Dez River. According to the results, the aquifer's PC ranges from 130 to 207 due to specific and intrinsic vulnerabilities. It is classified into three classes: medium, high, and very high, mainly affected by the river, land use, soil, and hydraulic conductivity.
Keywords
aquifer
Intrinsic Vulnerability
Northern Dezful Andimeshk
Potential for Contamination
Specific Vulnerability
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