Assessing groundwater vulnerability based on modified DRASTIC-model and COP-model in arid areas Online publication date: Mon, 31-Jan-2022
by Osama Gazal; Saeid Eslamian
International Journal of Hydrology Science and Technology (IJHST), Vol. 13, No. 2, 2022
Abstract: Groundwater vulnerability models are the most useful tools to simulate the various control factors that govern the surface contamination leaching process towards the aquifers. A study illustrating the significance of vulnerability models in dry areas, in the case of Jordan, and its contribution to groundwater sustainability. DRASTIC-model was performed with two scenarios. Sensitivity tests were applied to modify and examine the original theoretical weights and avoid the subjectivity in ratings and ranges of the parameters. Real parameters weights were calculated for the two scenarios by different methodologies rely on the GIS and using the extracted random points with the values of the seven DRASTIC parameters-maps. Long average and maximum concentrations of nitrate, sulphate, and salinity were used to assess the DRASTIC results since agriculture is the main source of pollution in the area. A comparison between the COP-model and the DRASTIC-model indicates the appropriate use of DRASTIC in arid areas.
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