Relationships between water flow rate and geophysical measurements in an alluvial aquifer |
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| Authors: | Pascale Sénéchal Guy Sénéchal |
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| Institution: | 1.Modélisation et Imagerie en Géosciences Pau,Université de Pau et des Pays de l’Adour,Pau,France |
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| Abstract: | Our study focuses on the potential usefulness of surface geophysical data to constrain the water content within an alluvial
aquifer. On a study area where two wells have been drilled, we have performed several geophysical measurements, including
ground penetrating radar, DC resistivity prospecting, seismic refraction survey and magnetic resonance soundings. From these
data, we estimated several parameters, namely, the water height in the deposits, the effective porosity, the water content,
the permeability, and the transmissivity of alluvial deposits. These physical parameters allow us to characterize the alluvial
deposits in order to constrain the estimation of the potential water flow. The lithology and water flow rate known from the
wells enabled us to compare geophysical results obtained in a high water flow rate zone to those in a low water flow rate
zone. Correlation has been found between the water flow rate observed in both wells and the geophysical data obtained in the
vicinity of these wells. |
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