| Autor: |
Aguedai, Hanaa, Jelbi, Mohammed, Lahlou, Fouad, Abdelaziz, Mridekh |
| Zdroj: |
Arabian Journal of Geosciences; Sep2022, Vol. 15 Issue 18, p1-19, 19p |
| Abstrakt: |
Coastal aquifers are adversely affected by a variety of factors that degrade their water quality. As a result of climate change, overexploitation and related agricultural activities, salinity increases through marine intrusion and contamination. The main purpose of this paper is to stress its importance and identify areas prone to marine intrusion along the coastline of the Mnasra basin. For this purpose, a hydrogeochemical analysis based on uniformly distributed wells was conducted; a geophysical assessment was also used to confirm the obtained results. Analytical procedures (Piper diagram, principal component analysis (PCA), Na+/Cl−, Ca2+/SO42−, (Br−/Cl−)/Cl− binary diagrams and mineralization process analysis) were applied to evaluate the results of the physico-chemical analysis. The obtained results have shown that the salinization is the result of various possible sources of water mineralization (marine influence, water/aquifer interaction and water irrigation). Nearshore samples have shown that groundwater samples are significantly more enriched with chloride, sodium and bromide, suggesting seawater intrusion in the Mnasra aquifer. This is confirmed by electrical conductivity (EC) mapping and supported by the structural map and associated electrostratigraphic cross section. These latter demonstrate that subsurface structures may play a significant role in making the aquifer more vulnerable to marine intrusion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink