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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hess-2017-96
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
10 Apr 2017
Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Hydrology and Earth System Sciences (HESS).
Multiconfiguration electromagnetic induction survey for paleochannel internal structure imaging: a case study in the alluvial plain of the river Seine, France
Fayçal Rejiba1, Cyril Schamper1, Antoine Chevalier1, Benoit Deleplancque2, Gaghik Hovhannissian3, Julien Thiesson1, and Pierre Weill4 1Sorbonne Universités – UPMC Univ Paris 06, CNRS, UMR 7619 METIS, Paris, France
2MINES ParisTech, France
3Centre IRD France Nord,– UMR 242 – IEES Paris, Bondy, France
4Normandie Univ, UNICAEN, CNRS, Morphodynamique Continentale et Côtière, 14000 Caen, France
Abstract. The La Bassée floodplain area is a large groundwater reservoir controlling most of the water exchanged between local aquifers and hydrographic networks within the Seine River Basin (France). Preferential flows depend essentially on sediment fills, whose characteristics are strongly influenced by paleomeander heterogeneities. A detailed knowledge of the internal heterogeneities of such paleomeanders can thus lead to a comprehensive understanding of its long-term hydrogeological processes. A geophysical survey based on the use of electromagnetic induction was performed on a representative paleomeander, situated close to the city of Nogent-sur-Seine in France. In the present study we assess the advantages of combining several spatial offsets, together with both vertical and horizontal dipole orientations (6 apparent conductivities), thereby mapping not only the spatial distribution of the paleomeander derived from LIDAR data, but also its vertical extent and internal variability.

Citation: Rejiba, F., Schamper, C., Chevalier, A., Deleplancque, B., Hovhannissian, G., Thiesson, J., and Weill, P.: Multiconfiguration electromagnetic induction survey for paleochannel internal structure imaging: a case study in the alluvial plain of the river Seine, France, Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2017-96, in review, 2017.
Fayçal Rejiba et al.
Fayçal Rejiba et al.
Fayçal Rejiba et al.

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Short summary
The internal variability of paleomeanders strongly influence water fluxes in alluvial plains. This study presents the results of a hydrogeophysical investigation that provide a very detailed characterization of the geometry of a wide paleomeander. The presented case study, situated in the Seine River basin (France), represents a common sedimentary and geomorphological structure in alluvial plains worldwide.
The internal variability of paleomeanders strongly influence water fluxes in alluvial plains....
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