Modification of the GALDIT framework using statistical and entropy models to assess coastal aquifer vulnerability |
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Authors: | Mojgan Bordbar Saman Javadi |
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Affiliation: | 1. Department of GIS/RS, Faculty of Natural resources and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Department of Irrigation and Drainage, Abouraihan Campus, University of Tehran, Tehran, Iran |
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Abstract: | Recently, groundwater vulnerability assessment of coastal aquifers using the GALDIT framework has been widely used to investigate the process of groundwater contamination. This study proposes multi-attribute decision-making (MADM) entropy and Wilcoxon non-parametric statistical test methods to improve the vulnerability index of coastal aquifers. The rates and weights of this framework were modified using Wilcoxon non-parametric and entropy methods, respectively, and a combined framework of GALDIT-entropy, Wilcoxon-GALDIT, and Wilcoxon-entropy was obtained. Pearson correlation coefficients between the mentioned vulnerability indices and total-dissolved solids (TDS) of 0.51, 0.66 and 0.75, respectively, were obtained. According to the results, the Wilcoxon-entropy index had the highest correlation with TDS. Generally, it can be concluded that the proposed frameworks provide a more accurate estimation of vulnerability distribution in coastal aquifers. |
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Keywords: | Wilcoxon Shannon entropy coastal aquifer vulnerability GALDIT framework |
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