Constraining Groundwater Modeling with Magnetic Resonance Soundings

被引:15
作者
Boucher, Marie [1 ,2 ]
Favreau, Guillaume [2 ,3 ]
Nazoumou, Yahaya [3 ]
Cappelaere, Bernard [4 ]
Massuel, Sylvain [5 ]
Legchenko, Anatoly [6 ]
机构
[1] UJF Grenoble 1, IRD, CNRS, G INP,LTHE,UMR 5564, F-38041 Grenoble, France
[2] IRD, Niamey, Niger
[3] Abdou Moumouni Univ, Fac Sci & Technol, Dept Geol, Niamey, Niger
[4] IRD, CC MSE, F-34095 Montpellier 5, France
[5] IRD, G Eau, Tunis 1004, Tunisia
[6] UTF Grenoble 1, IRD, CNRS, G INP,LTHE,UMR 5564, F-38041 Grenoble, France
关键词
HYDROLOGIC PROCESS SIMULATION; SAHELIAN WEST NIGER; ENDOREIC CATCHMENT; SEMIARID NIGER; AQUIFER; RESOLUTION; RECHARGE;
D O I
10.1111/j.1745-6584.2011.00891.x
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Magnetic resonance sounding (MRS) is a noninvasive geophysical method that allows estimating the free water content and transmissivity of aquifers. In this article, the ability of MRS to improve the reliability of a numerical groundwater model is assessed. Thirty-five sites were investigated by MRS over a similar to 5000 km(2) domain of the sedimentary Continental Terminal aquifer in SW Niger. Time domain electromagnetic soundings were jointly carried out to estimate the aquifer thickness. A groundwater model was previously built for this section of the aquifer and forced by the outputs from a distributed surface hydrology model, to simulate the observed long-term (1992 to 2003) rise in the water table. Uncertainty analysis had shown that independent estimates of the free water content and transmissivity values of the aquifer would facilitate cross-evaluation of the surface-water and groundwater models. MRS results indicate ranges for permeability (K = 1 x 10(-5) to 3 x 10(-4) m/s) and for free water content (w = 5% to 23% m(3)/m(3)) narrowed by two orders of magnitude (K) and by similar to 50% (w), respectively, compared to the ranges of permeability and specific yield values previously considered. These shorter parameter ranges result in a reduction in the model's equifinality (whereby multiple combinations of model's parameters are able to represent the same observed piezometric levels), allowing a better constrained estimate to be derived for net aquifer recharge (similar to 22 mm/year).
引用
收藏
页码:775 / 784
页数:10
相关论文
共 32 条
[1]   Mapping coastal aquifers by joint inversion of DC and TEM soundings - Three case histories [J].
Albouy, Y ;
Andrieux, P ;
Rakotondrasoa, G ;
Ritz, M ;
Descloitres, M ;
Join, JL ;
Rasolomanana, E .
GROUND WATER, 2001, 39 (01) :87-97
[2]  
[Anonymous], 1988, MODULAR 3 DIMENSIONA
[3]  
Boucher M, 2009, HYDROGEOL J, V17, P1805, DOI 10.1007/s10040-009-0447-x
[4]   Contribution of geophysical surveys to groundwater modelling of a porous aquifer in semiarid Niger: An overview [J].
Boucher, Marie ;
Favreau, Guillaume ;
Descloitres, Marc ;
Vouillamoz, Jean-Michel ;
Massuel, Sylvain ;
Nazoumou, Yahaya ;
Cappelaere, Bernard ;
Legchenko, Anatoli .
COMPTES RENDUS GEOSCIENCE, 2009, 341 (10-11) :800-809
[5]  
Bundschuh J., 2010, INTRO NUMERICAL MODE, P479
[6]   Hydrologic process simulation of a semiarid, endoreic catchment in Sahelian West Niger.: 2.: Model calibration and uncertainty characterization [J].
Cappelaere, B ;
Vieux, BE ;
Peugeot, C ;
Maia, A ;
Séguis, L .
JOURNAL OF HYDROLOGY, 2003, 279 (1-4) :244-261
[7]   The AMMA-CATCH experiment in the cultivated Sahelian area of south-west Niger - Investigating water cycle response to a fluctuating climate and changing environment [J].
Cappelaere, B. ;
Descroix, L. ;
Lebel, T. ;
Boulain, N. ;
Ramier, D. ;
Laurent, J. -P. ;
Favreau, G. ;
Boubkraoui, S. ;
Boucher, M. ;
Moussa, I. Bouzou ;
Chaffard, V. ;
Hiernaux, P. ;
Issoufou, H. B. A. ;
Le Breton, E. ;
Mamadou, I. ;
Nazoumou, Y. ;
Oi, M. ;
Ottle, C. ;
Quantin, G. .
JOURNAL OF HYDROLOGY, 2009, 375 (1-2) :34-51
[8]   Inverse problem in hydrogeology [J].
Carrera, J ;
Alcolea, A ;
Medina, A ;
Hidalgo, J ;
Slooten, LJ .
HYDROGEOLOGY JOURNAL, 2005, 13 (01) :206-222
[9]   40 years of inverse problems in hydrogeology [J].
de Marsily, G ;
Delhomme, JP ;
Delay, F ;
Buoro, A .
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES, 1999, 329 (02) :73-87
[10]   Improvement in TDEM sounding interpretation in presence of induced polarization.: A case study in resistive rocks of the Fogo volcano, Cape Verde Islands [J].
Descloitres, M ;
Guérin, R ;
Albouy, Y ;
Tabbagh, A ;
Ritz, M .
JOURNAL OF APPLIED GEOPHYSICS, 2000, 45 (01) :1-18