2019
A. Chatterjee, M. Arshad, A. Selles, and S. Ahmed. Relation Between Water Level Fluctuation and Variation in Fluoride Concentration in Groundwater - A Case Study from Hard Rock Aquifer of Telangana, India. In H. I. Chaminé, M. Barbieri, O. Kisi, M. Chen, and B. J. Merkel, editors, Advances in Sustainable and Environmental Hydrology, Hydrogeology, Hydrochemistry and Water Resources, pages 215--218. Springer International Publishing, 2019. [ DOI ]
S. A. Mizan, S. Ahmed, and A. Selles. Spatial estimation of groundwater storage from a 2D specific yield in the crystalline aquifer of the Maheshwaram watershed. Journal of Earth System Science, 128:185, 2019. [ DOI ]
S. A. Mizan, B. Dewandel, A. Selles, S. Ahmed, and Y. Caballero. A simple groundwater balance tool to evaluate the three-dimensional specific yield and the two-dimensional recharge: Application to a deeply weathered crystalline aquifer in southern India. Hydrogeology Journal, 27(8):3063--3080, 2019. [ DOI ]
M. Nicolas, O. Bour, A. Selles, B. Dewandel, V. Bailly-Comte, S. Chandra, S. Ahmed, and J.-C. Maréchal. Managed Aquifer Recharge in fractured crystalline rock aquifers: Impact of horizontal preferential flow on recharge dynamics. Journal of Hydrology, 573:717--732, 2019. [ DOI ]
2018
H. R. Bogena, T. White, O. Bour, X. Li, and K.H. Jensen. Toward better understanding of terrestrial processes through long-term hydrological observatories. Vadose Zone Journal, 17(1):180194, 2018. [ DOI ]
J. Gaillardet, I. Braud, F. Hankard, S. Anquetin, O. Bour, N. Dorfliger, J.R. de Dreuzy, S. Galle, C. Galy, S. Gogo, L. Gourcy, F. Habets, F. Laggoun, L. Longuevergne, T. Le Borgne, F. Naaim-Bouvet, G. Nord, V. Simonneaux, D. Six, T. Tallec, C. Valentin, G. Abril, P. Allemand, A. Arènes, B. Arfib, L. Arnaud, N. Arnaud, P. Arnaud, S. Audry, V. Bailly Comte, C. Batiot, A. Battais, H. Bellot, E. Bernard, C. Bertrand, H. Bessière, S. Binet, J. Bodin, X. Bodin, L. Boithias, J. Bouchez, B. Boudevillain, I. Bouzou Moussa, F. Branger, J. J. Braun, P. Brunet, B. Caceres, D. Calmels, B. Cappelaere, H. Celle-Jeanton, F. Chabaux, K. Chalikakis, C. Champollion, Y. Copard, C. Cotel, P. Davy, P. Deline, G. Delrieu, J. Demarty, C. Dessert, M. Dumont, C. Emblanch, J. Ezzahar, M. Estèves, V. Favier, M. Faucheux, N. Filizola, P. Flammarion, P. Floury, O. Fovet, M. Fournier, A. J. Francez, L. Gandois, C. Gascuel, E. Gayer, C. Genthon, M. F. Gérard, D. Gilbert, I. Gouttevin, M. Grippa, G. Gruau, A. Jardani, L. Jeanneau, J. L. Join, H. Jourde, F. Karbou, D. Labat, Y. Lagadeuc, E. Lajeunesse, R. Lastennet, W. Lavado, E. Lawin, T. Lebel, C. Le Bouteiller, C. Legout, Y. Lejeune, E. Le Meur, N. Le Moigne, J. Lions, A. Lucas, J. P. Malet, C. Marais-Sicre, J. C. Maréchal, C. Marlin, P. Martin, J. Martins, J. M. Martinez, N. Massei, A. Mauclerc, N. Mazzilli, J. Molénat, P. Moreira-Turcq, E. Mougin, S. Morin, J. Ndam Ngoupayou, G. Panthou, C. Peugeot, G. Picard, M. C. Pierret, G. Porel, A. Probst, J. L. Probst, A. Rabatel, D. Raclot, L. Ravanel, F. Rejiba, P. René, O. Ribolzi, J. Riotte, A. Rivière, H. Robain, L. Ruiz, J. M. Sanchez-Perez, W. Santini, S. Sauvage, P. Schoeneich, J. L. Seidel, M. Sekhar, O. Sengtaheuanghoung, N. Silvera, M. Steinmann, A. Soruco, G. Tallec, E. Thibert, D. Valdes Lao, C. Vincent, D. Viville, P. Wagnon, and R. Zitouna. OZCAR: The French network of critical zone observatories. Vadose Zone Journal, 17(1):180067, 2018. [ DOI ]
M.-F. Gérard, T. Le Borgne, O. Bour, C. Champollion, G. Porel, J. Bodin, L. Longuevergne, K. Chalikakis, J.-C. Maréchal, A. Selles, P. Pezard, H. Celle-Jeanton, G. Mailhat, L. Bodet, D. Jougnot, A. Battais, and P. Davy. H+, un réseau National de sites hydrogéologiques pour la caractérisation, la quantification et la modélisation des transferts d'eau, d'éléments et d'énergie dans les aquifères souterrains hétérogènes. Géologues : revue de l'Union française des géologues, 195:22--27, 2018. [ http ]
J.-C. Maréchal, A. Selles, B. Dewandel, A. Boisson, J. Perrin, and S. Ahmed. An observatory of groundwater in crystalline rock aquifers exposed to a changing environment: Hyderabad, India. Vadose Zone Journal, 17(1):180076, 2018. [ DOI ]
2017
A. Chatterjee, S. Sarah, P. D. Sreedevi, A. Selles, and S. Ahmed. Demarcation of fluoride vulnerability zones in granitic aquifer, semi-arid region, Telengana, India. Arabian Journal of Geosciences, 10(24):558, 2017. [ DOI ]
N. Guihéneuf, O. Bour, A. Boisson, T. Le Borgne, M. W. Becker, B. Nigon, M. Wajiduddin, S. Ahmed, and J.-C. Maréchal. Insights about transport mechanisms and fracture flow channeling from multi-scale observations of tracer dispersion in shallow fractured crystalline rock. Journal of Contaminant Hydrology, 206:18--33, 2017. [ DOI ]
2016
M. Alazard, A. Boisson, J-C. Maréchal, J. Perrin, B. Dewandel, T. Schwarz, M. Pettenati, G. Picot-Colbeaux, W. Kloppman, and S. Ahmed. Investigation of recharge dynamics and flow paths in a fractured crystalline aquifer in semi-arid india using borehole logs: Implications for managed aquifer recharge. Hydrogeology Journal, 24(1):35--57, 2016. [ DOI ]
2015
S. Ahmed, T. Arora, S. Sarah, F. A. Dar, T. K. Gaur, T. Warsi, and P. Raghuvendar. Viewing sub-surface for an effective managed aquifer recharge from a geophysical perspective. In Natural Water Treatment Systems for Safe and Sustainable Water Supply in the Indian Context Saph Pani, pages 113--124. IWA Publishing, 2015. [ DOI ]
A. Boisson, M. Alazard, G. Picot-Colbeaux, M. Pettenati, J. Perrin, S. Sarah, B. Dewandel, S. Ahmed, J.-C. Maréchal, and W. Kloppmann. Percolation tanks as managed aquifer recharge structures in crystalline aquifers - An example from the Maheshwaram watershed. In Natural Water Treatment Systems for Safe and Sustainable Water Supply in the Indian Context Saph Pani, pages 113--124. IWA Publishing, 2015. [ DOI ]
A. Boisson, N. Guihéneuf, J. Perrin, O. Bour, B. Dewandel, A. Dausse, M. Viossanges, S. Ahmed, and J.-C. Maréchal. Determining the vertical evolution of hydrodynamic parameters in weathered and fractured south indian crystalline-rock aquifers: Insights from a study on an instrumented site. Hydrogeology Journal, 23(4):757--773, 2015. [ DOI ]
A. Boisson, J.-C. Maréchal, J. Perrin, B. Dewandel, and S. Ahmed. Impact of vertical geological structure and water table depletion on indian crystalline aquifers. In Engineering Geology for Society and Territory - Volume 3, pages 583--587. Springer International Publishing, 2015. [ DOI ]
A. Boisson, D. Villesseche, M. Baisset, J. Perrin, M. Viossanges, W. Kloppmann, S. Chandra, B. Dewandel, G. Picot-Colbeaux, R. Rangarajan, J.-C. Maréchal, and S. Ahmed. Questioning the impact and sustainability of percolation tanks as aquifer recharge structures in semi-arid crystalline context. Environmental Earth Sciences, 73(12):7711--7721, 2015. [ DOI ]
S. Chandra, A. Boisson, and S. Ahmed. Quantitative characterization to construct hard rock lithological model using dual resistivity borehole logging. Arabian Journal of Geosciences, 8(6):3685--3696, 2015. [ DOI ]
W. Kloppmann, C. Sandhu, M. Groeschke, R. S. Pandian, G. Picot-Colbeau, M. Fahimuddin, S. Ahmed, M. Alazard, P. Amerasinghe, P. Bhola, A. Boisson, L. Elango, U. Feistel, S. Fischer, N. C. Ghosh, T. Grischek, G. Grützmacher, E. Hamann, I. S. Nair, M. Jampani, N. C. Mondal, B. Monninkhoff, M. Pettenati, S. Rao, S. Sarah, M. Schneider, S. Sklorz, D. Thiéry, , and A. Zabel. Modelling of natural water treatment systems in india: Learning from the Saph Pani case studies. In Natural Water Treatment Systems for Safe and Sustainable Water Supply in the Indian Context Saph Pani, pages 113--124. IWA Publishing, 2015. [ DOI ]
H. Pauwels, P. Négrel, B. Dewandel, J. Perrin, C. Mascré, S. Roy, and S. Ahmed. Hydrochemical borehole logs characterizing fluoride contamination in a crystalline aquifer (Maheshwaram, India). Journal of Hydrology, 525:302--312, 2015. [ DOI ]
2014
A. Boisson, M. Baïsset, M. Alazard, J. Perrin, D. Villesseche, B. Dewandel, W. Kloppmann, S. Chandra, G. Picot-Colbeaux, S. Sarah, S. Ahmed, and J.-C. Maréchal. Comparison of surface and groundwater balance approaches in the evaluation of managed aquifer recharge structures: Case of a percolation tank in a crystalline aquifer in india. Journal of Hydrology, 519:1620--1633, 2014. [ DOI ]
N. Guihéneuf, A. Boisson, O. Bour, B. Dewandel, J. Perrin, A. Dausse, M. Viossanges, S. Chandra, S. Ahmed, and J.-C. Maréchal. Groundwater flows in weathered crystalline rocks: Impact of piezometric variations and depth-dependent fracture connectivity. Journal of Hydrology, 511:320--334, 2014. [ DOI ]
M. Pettenati, G. Picot-Colbeaux, D. Thiéry, A. Boisson, M. Alazard, J. Perrin, B. Dewandel, J.-C. Maréchal, S. Ahmed, and W. Kloppmann. Water quality evolution during managed aquifer recharge (MAR) in indian crystalline basement aquifers: Reactive transport modeling in the critical zone. Procedia Earth and Planetary Science, 10:82--87, 2014. [ DOI ]
S. Sarah, S. Ahmed, A. Boisson, S. Violette, and G. de Marsily. Projected groundwater balance as a state indicator for addressing sustainability and management challenges of overexploited crystalline aquifers. Journal of Hydrology, 519:1405--1419, 2014. [ DOI ]
2013
H. Pauwels, L. Aquilina, P. Negrel, O. Bour, J. Perrin, and S. Ahmed. Groundwater salinization in hard-rock aquifers: Impact of pumping and vertical transfers. Procedia Earth and Planetary Science, 7:660--664, 2013. [ DOI ]
M. Pettenati, J. Perrin, H. Pauwels, and S. Ahmed. Simulating fluoride evolution in groundwater using a reactive multicomponent transient transport model: Application to a crystalline aquifer of southern India. Applied Geochemistry, 29:102--116, 2013. [ DOI ]
2012
B. Dewandel, J.-C. Maréchal, O. Bour, B. Ladouche, S. Ahmed, S. Chandra, and H. Pauwels. Upscaling and regionalizing hydraulic conductivity and effective porosity at watershed scale in deeply weathered crystalline aquifers. Journal of Hydrology, 416-417:83--97, 2012. [ DOI ]
J. Perrin, S. Ferrant, S. Massuel, B. Dewandel, J.-C. Maréchal, S. Aulong, and S. Ahmed. Assessing water availability in a semi-arid watershed of southern India using a semi-distributed model. Journal of Hydrology, 460-461:143--155, 2012. [ DOI ]
2011
S. Chandra, S. Ahmed, and R. Rangarajan. Lithologically constrained rainfall (LCR) method for estimating spatio-temporal recharge distribution in crystalline rocks. Journal of Hydrology, 402(3):250--260, 2011. [ DOI ]
B. Dewandel, P. Lachassagne, F. K. Zaidi, and S. Chandra. A conceptual hydrodynamic model of a geological discontinuity in hard rock aquifers: Example of a quartz reef in granitic terrain in south India. Journal of Hydrology, 405(3):474--487, 2011. [ DOI ]
H. H. Khan, A. Khan, S. Ahmed, and J. Perrin. GIS-based impact assessment of land-use changes on groundwater quality: Study from a rapidly urbanizing region of south India. Environmental Earth Sciences, 63(6):1289--1302, 2011. [ DOI ]
P. Negrel, H. Pauwels, B. Dewandel, J.-M. Gandolfi, C. Mascré, and S. Ahmed. Understanding groundwater systems and their functioning through the study of stable water isotopes in a hard-rock aquifer (Maheshwaram watershed, India). Journal of Hydrology, 397(1):55--70, 2011. [ DOI ]
H. Pauwels, M. Pettenati, J. Perrin, and P. Négre. Vulnerability of intensively-exploited hard-rock aquifers to fluoride contamination in India: Impact of global change. In Fourth International Groundwater Conference (IGWC-2011), page 6, 2011. [ .pdf ]
J. Perrin, C. Mascré, H. Pauwels, and S. Ahmed. Solute recycling: An emerging threat to groundwater quality in southern India? Journal of Hydrology, 398(1):144--154, 2011. [ DOI ]
2010
S. Chandra, B. Dewandel, S. Dutta, and S. Ahmed. Geophysical model of geological discontinuities in a granitic aquifer: Analyzing small scale variability of electrical resistivity for groundwater occurrences. Journal of Applied Geophysics, 71(4):137--148, 2010. [ DOI ]
B. Dewandel, J. Perrin, S. Ahmed, S. Aulong, Z. Hrkal, P. Lachassagne, M. Samad, and S. Massuel. Development of a tool for managing groundwater resources in semi-arid hard rock regions: Application to a rural watershed in south India. Hydrological Processes, 24(19):2784--2797, 2010. [ DOI ]
P. Négrel, R. Millot, S. Roy, C. Guerrot, and H. Pauwels. Lead isotopes in groundwater as an indicator of water-rock interaction (Masheshwaram catchment, Andhra Pradesh, India). Chemical Geology, 274(3):136--148, 2010. [ DOI ]
2008
S. Chandra, S. Ahmed, A. Ram, and B. Dewandel. Estimation of hard rock aquifers hydraulic conductivity from geoelectrical measurements: A theoretical development with field application. Journal of Hydrology, 357(3):218--227, 2008. [ DOI ]
B. Dewandel, J.-M. Gandolfi, D. de Condappa, and S. Ahmed. An efficient methodology for estimating irrigation return flow coefficients of irrigated crops at watershed and seasonal scale. Hydrological Processes, 22(11):1700--1712, 2008. [ DOI ]
2007
B. Dewandel, J. M. Gandolfi, F. K. Zaidi, S. Ahmed, and K. Subrahmanyam. A decision support tool with variable agroclimatic scenarios for sustainable groundwater management in semi-arid hard-rock areas. Current Science, 92(8):1093--1102, 2007.
D. Kumar, S. Ahmed, N. S. Krishnamurthy, and B. Dewandel. Reducing ambiguities in vertical electrical sounding interpretations: A geostatistical application. Journal of Applied Geophysics, 62(1):16--32, 2007. [ DOI ]
J.-C. Maréchal, B. Dewandel, S. Ahmed, and P. Lachassagne. Hard rock aquifers characterization prior to modelling at catchment scale: An application in India. In Groundwater in fractured rocks, IAH Selected Papers, pages 227--242. Springer, 2007.
F. K. Zaidi, S. Ahmed, B. Dewandel, and J.-C. Maréchal. Optimizing a piezometric network in the estimation of the groundwater budget: A case study from a crystalline-rock watershed in southern India. Hydrogeology Journal, 15(6):1131--1145, 2007. [ DOI ]
2006
D. Dewandel, P. Lachassagne, R. Wyns, J.-C. Maréchal, and N. S. Krishnamurthy. A generalized 3-D geological and hydrogeological conceptual model of granite aquifers controlled by single or multiphase weathering. Journal of Hydrology, 330(1):260--284, 2006. [ DOI ]
S. Dutta, N. S. Krishnamurthy, T. Arora, V. A. Rao, S. Ahmed, and J. M. Baltassat. Localization of water bearing fractured zones in a hard rock area using integrated geophysical techniques in Andhra Pradesh, India. Hydrogeology Journal, 14:760--766, 2006. [ DOI ]
J.-C. Maréchal, S. Ahmed, C. Engerrand, L. Galeazzi, and F. Touchard. Threatened groundwater resources in rural India: An example of monitoring. Asian Journal of Water, Environment and Pollution, 3(2):15--21, 2006. [ .pdf ]
J.-C. Maréchal, B. Dewandel, S. Ahmed, L. Galeazzi, and F. K. Zaidi. Combined estimation of specific yield and natural recharge in a semi-arid groundwater basin with irrigated agriculture. Journal of Hydrology, 329(1):281--293, 2006. [ DOI ]
P. D. Sreedevi, S. Ahmed, B. Made, E. Ledoux, and J. M. Gandolfi. Association of hydrogeological factors in temporal variations of fluoride concentration in a crystalline aquifer in India. Environmental Geology, 50:1--11, 2006. [ DOI ]
2004
J. C. Maréchal, B. Dewandel, and K. Subrahmanyam. Use of hydraulic tests at different scales to characterize fracture network properties in the weathered-fractured layer of a hard rock aquifer. Water Resources Research, 40(11), 2004. [ DOI ]
J.-C. Maréchal, R. Wyns, P. Lachassagne, and K. Subrahmanyam. Vertical anisotropy of hydraulic conductivity in the fissured layer of hard-rock aquifers due to the geological structure of weathering profiles. Journal of the Geological Society of India, 63(5):545--550, 2004. [ http ]
2003
J.-C. Maréchal, B. Dewandel, K. Subrahmanyam, and R. Torri. Specific methods for the evaluation of hydraulic properties in fractured hard-rock aquifers. Current Science, 85(4):511--516, 2003. [ http ]
J.-C. Maréchal, R. Wyns, P. Lachassagne, K. Subrahmanyam, and F. Touchard. Anisotropie verticale de la perméabilité de l’horizon fissuré des aquifères de socle : Concordance avec la structure géologique des profils d’altération. Comptes Rendus Géoscience, 335:451--460, 2003. [ http ]
J.C. Maréchal, L. Galeazzi, B. Dewandel, and S. Ahmed. Importance of irrigation return flow on the groundwater budget of a rural basin in India. In Hydrology of the Mediterranean and semiarid regions, International Symposium at Montpellier, number 278, pages 62--67. IAHS, 2003. [ .pdf ]