论文信息 - Estimation de la recharge de la nappe phréatique du Continental Terminal (Niamey, Niger) à partir des teneurs en tritium

Estimation de la recharge de la nappe phréatique du Continental Terminal (Niamey, Niger) à partir des teneurs en tritium

As often in the Sahelian belt, recharge of the Continental Terminal water table near Niamey, Niger, is essentially due to rainfall infiltration through numerous temporary pools. Tritium content in rain over the past 40 years is reconstructed and used by a simple model to calculate the groundwater renewal rate according to measurements throughout the aquifer. This isotopic estimate (25 mm per year) is close to the hydrodynamical estimate.

J. Taupin | C. Leduc

[1] John Bromley,et al. Water table fluctuation and recharge in semi-arid climate: some results of the HAPEX-Sahel hydrodynamic survey (Niger) , 1997 .

[2] C. Leduc,et al. Variability of groundwater recharge in the Sahel: piezometric survey of the Continental Terminal aquifer (Niger) , 1994 .

[3] J.-P. Goutorbe,et al. HAPEX-Sahel: a large-scale study of land-atmosphere interactions in the semi-arid tropics , 1994 .

[4] C. B. Gaye,et al. La recherche du pic de tritium thermonucléaire en zone non saturée profonde sous climat semi-aride pour la mesure de la recharge des nappes : première application au Sahel , 1992 .