Investigation of the groundwater salinization in the Martil coastal aquifer (Tetouan-Morocco)
Larabi, A.; Hilali, M.; Sbai, M.A. (1999). Investigation of the groundwater salinization in the Martil coastal aquifer (Tetouan-Morocco). Natuurwet. Tijdschr. 79(1-4): 263-267
In: Natuurwetenschappelijk Tijdschrift. L. Walschot/Natuur- en Geneeskundige Vennootschap: Gent. ISSN 0770-1748, meer
Ook verschenen in:
De Breuck, W.; Walschot, L. (Ed.) (1999). Proceedings of the 15th Salt-Water Intrusion Meeting Ghent (Belgium), 25-29 May 1998. Natuurwetenschappelijk Tijdschrift, 79(1-4). Natuurwetenschappelijk Tijdschrift: Gent. 307 pp., meer
This paper presents results of hydrogeological investigations and groundwater salinization in the Martil aquifer system based on the measurements achieved during 1996 and 1997. Piezometric maps and profiles have been established to characterize the global and local flow directions, distribution of hydraulic heads and temporal variation of groundwater level. Groundwater flow is directed W.-E., and the hydraulic gradient is decreasing in the flow direction. Rainfall infiltration and river interaction are the main recharge of the aquifer system. The groundwater-table is very close to the soil surface, especially in the centre of the plain (0.5-5 m). The Martil River, which crosses the plain, is subject to industrial and domestic waste-water inflows that pollute the river water leading to the degradation of its quality. Indeed, the Tetouan City discharges into the river 58830 m³/day of waste water, and measurements downstream of the discharge sectors show that the electrical conductivity (EC) reaches high values. Without treatment of waste water in the river, the groundwater is also contaminated. The groundwater salinization increases from upstream to downstream following the flow direction. Salinization is more affected by evaporation of groundwater in the centre of the plain where EC values are important, and by the waste-water recharge from the Martil river. This salinization is also important near the coast due salt-water intrusion indicated by some observation wells.
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