HYDROGEOCHEMICAL PROCESSES AND WATER-ROCK INTERACTION OF GROUNDWATER IN AL-DAMMAM AQUIFER AT BAHR AL-NAJAF, CENTRAL IRAQ | ||
| Iraqi Bulletin of Geology and Mining | ||
| Article 1, Volume 12, Issue 1, April 2016, Pages 1-15 | ||
| Authors | ||
| Salih M. Awadh; Firas M. Abdulhussein; Joudah A. Al-Kilabi | ||
| Abstract | ||
| The hydrogeochemistry of groundwater in the Dammam aquifer was studied via 22 wells in Bahr Al-Najaf basin in order to identify the main hydrogeochemical processes and rock-water interaction. Groundwater in the Dammam aquifer is characterized by neutral to slightly alkaline hard water, excessively mineralized, and slightly brackish water type, in which Na+ and SO42– are the dominant ions. The average contribution of cations in the aquifer is Na+ (24%), Ca2+ (14%), Mg2+ (11%) and K+ (1%); whereas the contribution of anions is SO42– (23%), Cl– (20%) and HCO3– (7%). Rock-water interaction processes are identified to include dissolution (carbonates, sulfates, halite, and some silicates such as clay minerals), leaching, and cation exchanges, while evaporation has only a very little impact. | ||
| Keywords | ||
| hydrogeochemistry; groundwater; rock; water interaction; Bahr Al; Najaf; Dammam Aquifer; Iraq | ||
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