AHP-DRASTIC: software for specific aquifer vulnerability assessment using DRASTIC model and GIS |
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| Affiliation: | 1. Institute of Remote Sensing, Anna University, Chennai, India;2. Centre for Water Resources, Anna University, Chennai, India;1. College of Natural and Health Sciences, Zayed University, P O Box, 144534 Abu Dhabi, UAE;2. Environment Department, Dubai Municipality, Dubai, UAE;3. Independent Geospatial Researcher, Dubai, UAE;1. Faculté des Sciences de Tunis, Université de Tunis El Manar, UR13ES26, 2092 Tunis, Tunisia;2. Institut National Agronomique de Tunisie, Université de Carthage, 1082 Tunis, Tunisia;3. HydrISE, UniLaSalle, 19 Rue Pierre Waguet, 60026 Beauvais, France;1. Department of Earth Sciences, Faculty of Natural Sciences, University of Tabriz, 29 Bahman Boulevard, Tabriz, 166616471, East Azerbaijan, Iran;2. Institute of Environment, University of Tabriz, Tabriz, 5166616471, East Azerbaijan, Iran;3. Traditional Medicine and Hydrotherapy Research Center, Ardabil University of Medical Sciences, Ardabil, 5618985991, Ardabil, Iran;4. Medical Geology and Environmental Research Center, University of Tabriz, Iran;5. Department of Civil Engineering, Faculty of Engineering, University of Maragheh, P.O. Box 55136-553, Maragheh, East Azerbaijan, Iran;6. School of Geography and Planning, Sun Yat - Sen University, Guangzhou, 510275, PR China;7. Department of Disaster Management, Alagappa University Karaikudi, 630003, Tamilnadu, India;1. Department of Geology, University of Dhaka, Bangladesh;2. Schools of Science, University of New South Wales (UNSW), Canberra, Australia;1. School of Water Resources, Indian Institute of Technology Kharagpur, India;2. Department of Civil Engineering, Indian Institute of Technology Kharagpur, India;3. Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Malaysia;4. Department of Energy and Mineral Resources Engineering, Choongmu-gwan, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea |
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| Abstract: | A software package AHP-DRASTIC has been developed to derive ratings and weights of modified DRASTIC model parameters for use in specific aquifer vulnerability assessment studies. The software is integrated with ArcView Geographical Information System (GIS) software for modelling aquifer vulnerability, to predict areas which are more likely than others to become contaminated as a result of activities at or near the land surface. The ranges of a few of the DRASTIC model parameters have been modified to adapt to local hydrogeologic settings. Analytic Hierarchy Process (AHP) has been used to compute the ratings and weights of the criteria and sub-criteria of all parameters used in the DRASTIC model. The output from AHP generates a MS Access database for these parameters, which is then interfaced with ArcView using Avenue Scripts. AHP-DRASTIC is aimed at providing user-friendly GUI interfaced with GIS for the estimation of weights and ranks of the thematic layers used for aquifer vulnerability assessment. Contingency table analysis indicates that all wells in low and high vulnerability category have concentrations less than 10 ppm and more than 10 ppm, respectively. The model is validated with groundwater quality data and the results have shown strong relationship between DRASTIC Specific Vulnerability Index and nitrate-as-nitrogen concentrations with a correlation co-efficient of 0.84 at 0.01 level. |
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