Assessment of groundwater vulnerability and quality in coastal aquifers: a case study (Tipaza, North Algeria)

摘要: In the coastal aquifer of Nador, vulnerability index (AVI) and Groundwater occurrence, Aquifer hydraulic conductivity, Level above sea, Distance from shore, Impact magnitude existing seawater intrusion in area, Thickness which is being mapped (GALDIT) methods were employed to determine groundwater anthropogenic pollution intrusion. The quality also studied by using water (WQI), for identify sectors with best drinking purposes. AVI method classified area into three classes: low, moderate, high two parts Nador valley due activities, while GALDIT delineates low ( 7.5) covering 47, 36, 17 %, respectively, study surface. class located sector; it proximity conductivity aquifer, exchange freshwater-seawater after overexploitation, thickness aquifer. WQI has been calculated present assess suitability Twenty-four samples collected plain during dry period 2013. show that % sample falls good category, 46 poor 12 very 25 unsuitable category. purposes its salinity, values EC, Cl−, Na+, Mg2+, SO42−