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About This Document: The deep and confined Maastrichtian aquifer contains considerable groundwater resources. It stretches over nearly 200,000 km^sup 2^, from the northern part of Mauritania to the South of Guinea Bissau where it becomes shallow. The aquifer provides 40% of the total drinking water extracted from the different aquifers and nearly 800 wells equally distributed operate only in the top 50 m of the aquifer. Despite the importance of these resources for providing water in the rural and urban areas, the aquifer characteristics are not well defined. The present paper aims to define first the physical and chemical characteristics of the Maastrichtian aquifer. Data from oil wells and geophysical logging are used to investigate the geometry of the aquifer and the position of the fresh/salty water interface. The average thickness is 250 m. Chemical data coming from pumping wells indicate high chloride (250 mg/l-1,600 mg/l) and fluoride content (1 mg/l-5.5 mg/l). Therefore, the reassessment has to take into account the chemical aspect of the water.

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Reassessment of the Resources of a Deep Aquifer System under Physical and Chemical Constraints: The Maastrichtian Aquifer

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Journal of Water Resource and Protection, 2012, 4, 217-223 217

doi:10.4236/jwarp.2012.44024 Published Online April 2012 (http://www.SciRP.org/journal/jwarp)

Reassessment of the Resources of a Deep A

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