Saltwater Intrusion in Jizan Coastal Zone, Southwest Saudi Arabia, Inferred from Geoelectric Resistivity SurveyReportar como inadecuado




Saltwater Intrusion in Jizan Coastal Zone, Southwest Saudi Arabia, Inferred from Geoelectric Resistivity Survey - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

This work focuses on thecauses of water quality deterioration in the coastal plain of Jizan area,southwest Saudi Arabia using vertical electrical sounding VES surveys.Schlumberger electrode array is used in the study with the current electrodespacing ranging from 400 to 600 m to delineate the thickness of the shallowaquifer and its possible interaction with the sea water. The differences inresistivity are associated with the variations in lithology and groundwatersaturation and salinity. The interpretation of VES curves reveals lowresistivity zones characterizing the study area. These zones reflect salinewater intrusion in the coastal aquifer. Generally, it is observed that theresistivity of saturated zone decreases towards the sea, indicating theinfluence of seawater. Based on the interpretation of the constructedresistivity pseudo-sections and 1-D sequential inversion models, three factorsare identified to control the seawater intrusion into the shallow groundwateraquifers: 1 presence of faults that contribute extensively in the seawaterintrusion as the seawater invades the coastal aquifers through the crushedrocks in fault zones related to the Red Sea rifting, 2 over-withdrawal ofgroundwater from the coastal aquifers, resulting in saline water intrusion fromthe sea into the freshwater aquifer, and 3 the lithological variation wherethe alluvial sediments of the ancient buried wadi dry valley channels providepotential pathways for saltwater intrusion and make a hydraulic connectionbetween the aquifer and the sea water.

KEYWORDS

Geoelectric Resistivity, Seawater Intrusion, Jizan Area, Saudi Arabia

Cite this paper

Mogren, S. 2015 Saltwater Intrusion in Jizan Coastal Zone, Southwest Saudi Arabia, Inferred from Geoelectric Resistivity Survey. International Journal of Geosciences, 6, 286-297. doi: 10.4236-ijg.2015.63022.





Autor: Saad Mogren

Fuente: http://www.scirp.org/



DESCARGAR PDF




Documentos relacionados