A parametric sensitivity analysis for prioritizing regolith knowledge needs for modeling water transfers in the West African critical zone

Autor: Amelie Herzog, Basile Hector, Jean‐Martial Cohard, Jean‐Michel Vouillamoz, Fabrice Messan Amene Lawson, Christophe Peugeot, Inge deGraaf

Publikováno v: Vadose Zone Journal, Vol 20, Iss 6, Pp n/a-n/a (2021)

Abstract Hard rock aquifers (HRAs) in West Africa (WA) are located within a thick regolith layer. The representation of thick tropical regolith in integrated hydrological models lacks consensus on aquifer geometries and parameter ranges. Our main obj

Externí odkaz: https://doaj.org/article/d2d9e31d27c44f45a037f3b863b2fb10

Taking into Account the Role of the Weathering Profile in Determining Hydrodynamic Properties of Hard Rock Aquifers

Autor: Mahamadou Koïta, Hamma Fabien Yonli, Donissongou Dimitri Soro, Amagana Emmanuel Dara, Jean-Michel Vouillamoz

Publikováno v: Geosciences, Vol 7, Iss 3, p 89 (2017)

The present study aims at understanding the role of the structure and the geometry of the weathering profile on the hydrodynamic behavior of hard rock aquifers. We first described 2D geophysical cross sections of weathering profiles realized and vali

Externí odkaz: https://doaj.org/article/34e523498fea44c486fcb30793fe877c

Paleochannel groundwater discharge to the River Niger in the Iullemmeden Basin estimated by sub- surface geophysics and piezometry mapping

Autor: Rabilou ABDOU MAHAMAN, Yahaya NAZOUMOU, Guillaume FAVREAU, Boukari ISSOUFOU OUSMANE, Marie BOUCHER, Maman Sani ABDOU BABAYE, Fabrice M. A. LAWSON, Jean-Michel VOUILLAMOZ, Abdou GUERO, Anatoly LEGCHENKO, Richard Graham TAYLOR

In drylands groundwater is often the only perennial source of freshwater to sustain domestic water supplies and irrigation. Knowledge of the pathways and dynamics of groundwater discharge and recharge is essential to inform sustainable and rational m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e186334266887e8f883dd82b9280b1d
https://doi.org/10.21203/rs.3.rs-2038747/v1

Changes in aquifer properties along a seasonal river channel of the Niger Basin: Identifying groundwater recharge pathways in a dryland environment

Autor: Boukari Issoufou Ousmane, Yahaya Nazoumou, Guillaume Favreau, Maman Sani Abdou Babaye, Rabilou Abdou Mahaman, Marie Boucher, Ibrahim Issoufa, Fabrice M.A. Lawson, Jean-Michel Vouillamoz, Anatoly Legchenko, Richard G. Taylor

Publikováno v: Journal of African Earth Sciences. 197:104742

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40ec74f1e9fc6f93e8a78e45a99e111f
https://doi.org/10.1016/j.jafrearsci.2022.104742

Feasibility study of a surface-borehole NMR method

Autor: Jean-Michel Vouillamoz, Jean-Michel Baltassat, Ghislain Pierrat, Jean-François Girard, Anatoly Legchenko, Benoit Texier, Fabrice Messan Amene Lawson, Marie Boucher, Iboukoun Christian Alle

Publikováno v: Journal of Applied Geophysics
Journal of Applied Geophysics, 2020, 177, pp.104039. ⟨10.1016/j.jappgeo.2020.104039⟩
Journal of Applied Geophysics, Elsevier, 2020, 177, pp.104039. ⟨10.1016/j.jappgeo.2020.104039⟩

We present results of a feasibility study of a borehole induction-coil sensor for surface-borehole NMR (SBNMR) investigations. This sensor of 7 cm diameter and 180 cm length is connected to a standard MRS (Magnetic Resonance Sounding) instrument. Thu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acf582604f31abb107a50d163d7c6d0a
https://hal-brgm.archives-ouvertes.fr/hal-02913683/document