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DOI: https://doi.org/10.4491/eer.2017.072
Groundwater pollution risk mapping using modified DRASTIC model in parts of Hail region of Saudi Arabia
Izrar Ahmed1, Yousef Nazzal2, and Faisal Zaidi3
1Environment Department, Dubai Municipality, Dubai, UAE
2College of Natural & Health Sciences, Zayed University, P.O.Box 144534, Abu Dhabi, UAE
3Department of Geology & Geophysics, King Saud University, Riyadh, Saudi Arabia
Corresponding Author: Yousef Nazzal ,Tel: +971-509620945 , Email: yousef.nazzal@zu.ac.ae
Received: June 11, 2017;  Accepted: October 8, 2017.
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The present study deals with the management of groundwater resources of an important agriculture track of North-Western part of Saudi Arabia. Due to strategic importance of the area efforts have been made to estimate aquifer proneness to attenuate contamination. This includes determining hydrodynamic behavior of the groundwater system. The important parameters of any vulnerability model are geological formations in the region, depth to water levels, soil, rainfall, topography, vadose zone, the drainage network and hydraulic conductivity, land use, hydrochemical data, water discharge, etc. All these parameters have greater control and helps determining response of groundwater system to a possible contaminant threat. A widely used DRASTIC model helps integrate these data layers to estimate vulnerability indices using GIS environment. DRASTIC parameters were assigned appropriate ratings depending upon existing data range and a constant weight factor. Further, land-use pattern map of study area was integrated with vulnerability map to produce pollution risk map. A comparison of DRASTIC model was done with GOD and AVI vulnerability models. Model validation was done with NO3, SO4 and Cl concentrations. These maps help to assess the zones of potential risk of contamination to the groundwater resources.
Keywords: Al Hail | DRASTIC Aquifer vulnerability | Groundwater resources | Landuse pattern | Risk map | Saudi Arabia
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