Groundwater pollution with seawater in Zawia area

Abstract

This study is concentrated on the groundwater pollution with seawater and its extent in the upper coastal aquifer in the Zawia area based on chemical analysis. To conduct this study, two well sectors normal to the sea were chosen one at Joddaim area which extends 12 km and contains 9 wells and the other at Harsha area which extends 10 km and contains 10 wells. These wells are used for agricultural and domestic purposes and their  depths range from 26 to 105 m below the ground surface. To show local distribution for some related information, another two well sectors were selected between the first two sectors one at Salah-Edden area and the other at Abo-Ghelasha area, each sector contains 10 wells. To determine the intensity pollution, some physical and chemical analyses were conducted on water samples collected from these wells. The analyses include water temperature, pH, EC, TDS, Ions, and cantons. Also, some other related hydrogeological properties for the aquifer were determined such as water table level and structural geology. The results of this study have shown that the pollution in the first sector extended around 5 km from the sea whereas in the second sector it extended 6 km. In comparison with the previous study, the pollution intensity and extent is increased compared with that in 1995, especially in second sector. 

Key Words:  quifer, Groundwater, Groundwater contamination with sea water.