Garcia-Arostegui J.L., Baudron P., Taddei D., Fernandez-Molina P., Leduc Christian, Gomariz-Castillo F., Blondet I. (2017). Caracterizacion de la recarga en un episodio de precipitacion excepcional e implicationes sobre un lagoon costero asociado (campo de Cartagena-Mar Menor, SE Espana). In :
Calvache M.L. (ed.), Duque C. (ed.), Pulido-Velazquez D. (ed.). Impacts of global change on Western Mediterranean aquifers. Londres (GBR) ; Grenade : AIH ; Université de Grenade, p. 319-324. Congress on Groundwater and Global Change in the Western Mediterranean, Grenade (SPA), 2017/11/06-07. ISBN 978-0-7354-1675-8.
Titre du document
Caracterizacion de la recarga en un episodio de precipitacion excepcional e implicationes sobre un lagoon costero asociado (campo de Cartagena-Mar Menor, SE Espana)
Année de publication
2017
Type de document
Partie d'ouvrage
Auteurs
Garcia-Arostegui J.L., Baudron P., Taddei D., Fernandez-Molina P., Leduc Christian, Gomariz-Castillo F., Blondet I.
In
Calvache M.L. (ed.), Duque C. (ed.), Pulido-Velazquez D. (ed.), Impacts of global change on Western Mediterranean aquifers
Source
Londres (GBR) ; Grenade : AIH ; Université de Grenade, 2017,
p. 319-324 ISBN 978-0-7354-1675-8
Colloque
Congress on Groundwater and Global Change in the Western Mediterranean, Grenade (SPA), 2017/11/06-07
A groundwater exploration work in the Tamanrasset region in southern Algeria was started in August 2016 to assess the water reserves in the hydrogeological system related to the Oued Tamanrasset underflow water table which overcomes a volcanic basement. Five (05) electrical resistivity tomography (ERT) surveys were conducted in Tamanrasset area by using ABEM Terrameter LS system. the low electrical contrast between wet alluvium and water saturated alterites makes difficult the electrical response interpretation. to overcome the difficulties of interpretation of ERT profiles, field investigations, laboratory tests and software simulations, were carried out in order to clearly identify the structure of the hydrogeological system. The experimental investigation of the electrical characteristics of the alluvium as a function of water saturation was carried by the use of two devices (Wenner α and Schlumberger). Samples true resistivity values varies between 50 Ω.m for a 100% saturated sample and 1250 Ω.m for a 25% saturation sample. The interpretation of the measurements by the RES2DINV software made it possible to give 2D images of the subsoil up to a depth of 50 m. the electrical contrast between the bedrock and the overlying formations made it possible to identify it, however, it was difficult to distinguish alterites from alluvium. A methodology combining piezometric survey, geo-electrical measurements and field observations improves the interpretation of electrical tomography profiles and the application of the ERT method for accurate characterization of water resources in the Tamanrasset region.
Plan de classement
Fonctionnements des systèmes d'eau et modélisation [062EVAEAU02]
Descripteurs
RESSOURCES EN EAU ; AQUIFERE ; PRECIPITATION ; LAGUNE ; EUTROPHISATION ; ZONE COTIERE ; RECHARGE
Description Géographique
ESPAGNE
Localisation
Fonds IRD [F B010073365]
Identifiant IRD
fdi:010073365
