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Dr Zahra THOMAS


Zahra Thomas is associate professor in Hydraulics. She is working on catchment hydrology and groundwater modelling.
Her mains skills are in numerical models, informatic, hydraulics and hydrology.
She is involved in modelling and dating groundwater transit time and groundwater-river exchanges.
She is also deeply involved in the deployment of field instruments for the monitoring of water fluxes and solute concentrations,
in connection with land use and catchment/aquifer characteristics. She is teaching hydraulics, soil physics and numerical modelling.


Journal articles25 documents

  • Hugo Le Lay, Zahra Thomas, Olivier Bour, Francois Rouault, Pascal Pichelin, et al.. Experimental and Model‐Based Investigation of the Effect of the Free‐Surface Flow Regime on the Detection Threshold of Warm Water Inflows. Water Resources Research, American Geophysical Union, 2020, 56 (2), pp.e2018WR023722. ⟨10.1029/2018WR023722⟩. ⟨insu-02533350⟩
  • Rebecca Frei, Benjamin W. Abbott, Rémi Dupas, Sen Gu, Gérard Gruau, et al.. Predicting nutrient incontinence in the Anthropocene at watershed scales. Frontiers in Environmental Science, Frontiers, 2020, 7 (200), pp.21. ⟨10.3389/fenvs.2019.00200⟩. ⟨insu-02413216⟩
  • Zahra Thomas, Pauline Rousseau-Gueutin, Benjamin Abbott, Tamara Kolbe, Hugo Le Lay, et al.. Long-term ecological observatories needed to understand ecohydrological systems in the Anthropocene: a catchment-scale case study in Brittany, France. Regional Environmental Change, Springer Verlag, 2019, 19 (92), pp.363-377. ⟨10.1007/s10113-018-1444-1⟩. ⟨insu-01987256⟩
  • Valérie Viaud, Zahra Thomas. Une réflexion sur l’état des connaissances des fonctions du bocage pour l’eau dans une perspective de mobilisation pour l’action. Sciences Eaux & Territoires , INRAE, 2019, Ressources en eau, ressources bocagères, 30 (4), pp.32-37. ⟨hal-02432470⟩
  • Silvia Poblador, Zahra Thomas, Pauline Rousseau-Gueutin, Santiago Sabaté, Francesc Sabater. Riparian forest transpiration under the current and projected Mediterranean climate: Effects on soil water and nitrate uptake. Ecohydrology, Wiley, 2019, 12 (1), pp.e2043. ⟨10.1002/eco.2043⟩. ⟨hal-02046425⟩
  • Tamara Kolbe, Jean-Raynald de Dreuzy, Benjamin Abbott, Luc Aquilina, Tristan Babey, et al.. Stratification of reactivity determines nitrate removal in groundwater. Proceedings of the National Academy of Sciences of the United States of America , National Academy of Sciences, 2019, 116 (7), pp.2494-2499. ⟨10.1073/pnas.1816892116⟩. ⟨insu-01999430v2⟩
  • Hugo Le Lay, Zahra Thomas, Francois Rouault, Pascal Pichelin, Florentina Moatar. Characterization of Diffuse Groundwater Inflows into Stream Water (Part II: Quantifying Groundwater Inflows by Coupling FO-DTS and Vertical Flow Velocities). Water, MDPI, 2019, 11 (2430), pp.2430-. ⟨10.3390/w11122430⟩. ⟨hal-02372086⟩
  • Hugo Le Lay, Zahra Thomas, Francois Rouault, Pascal Pichelin, Florentina Moatar. Characterization of Diffuse Groundwater Inflows into Streamwater (Part I: Spatial and Temporal Mapping Framework Based on Fiber Optic Distributed Temperature Sensing). Water, MDPI, 2019, 11 (11), pp.2389. ⟨10.3390/w11112389⟩. ⟨hal-02372030⟩
  • Sven Frei, Stefan Durejka, Hugo Le Lay, Zahra Thomas, Benjamin Gilfedder. Quantification of Hyporheic Nitrate Removal at the Reach Scale: Exposure Times vs. Residence Times. Water Resources Research, American Geophysical Union, 2019, 55 (11), pp.9808-9825. ⟨10.1029/2019WR025540⟩. ⟨hal-02365459⟩
  • Benjamin Abbott, Gérard Gruau, Jay P. Zarnetske, Florentina Moatar, Lou Barbe, et al.. Unexpected spatial stability of water chemistry in headwater stream networks. Ecology Letters, Wiley, 2018, 21 (2), pp.296-308. ⟨10.1111/ele.12897⟩. ⟨insu-01674523⟩
  • Zahra Thomas, Albert Abbott. Hedgerows reduce nitrate flux at hillslope and catchment scales via root uptake and secondary effects. Journal of Contaminant Hydrology, Elsevier, 2018, 215, pp.51-61. ⟨10.1016/j.jconhyd.2018.07.002⟩. ⟨hal-02014945⟩
  • Jacques Baudry, Audrey Alignier, Zahra Thomas. Interdisciplinarité et représentation de la complexité des systèmes socio-écologiques : recherches sur la zone atelier Armorique. Natures Sciences Sociétés, EDP Sciences, 2017, Pour une recherche en appui à l'action publique : leçons de l'expérience du ministère de l'environnement (1990–2016), 25, pp.S50 - S54. ⟨10.1051/nss/2017032⟩. ⟨hal-01686598⟩
  • Zahra Thomas, Benjamin Abbott, Olivier Troccaz, Jacques Baudry, Gilles Pinay. Proximate and ultimate controls on carbon and nutrient dynamics of small agricultural catchments. Biogeosciences, European Geosciences Union, 2016, 13 (6), pp.1863-1875. ⟨10.5194/bg-13-1863-2016⟩. ⟨hal-01686556⟩
  • Didier Michot, Zahra Thomas, Issifou Adam. Nonstationarity of the electrical resistivity and soil moisture relationship in a heterogeneous soil system: a case study. Soil, European Geosciences Union (EGU), 2016, 2 (2), pp.241-255. ⟨10.5194/soil-2-241-2016⟩. ⟨hal-01686648⟩
  • Clara Chauvet, Jean-Raynald de Dreuzy, Zahra Thomas, Gwenaëlle Carfantan, Hervé Andrieu. Towards a Robust and Flexible Numerical Framework for Integrated Urban Water System Modeling. Procedia Engineering, Elsevier, 2016, 154, pp.757-764. ⟨10.1016/j.proeng.2016.07.580⟩. ⟨hal-01686543⟩
  • Zahra Thomas, Pauline Rousseau-Gueutin, Tamara Kolbe, Benjamin W. Abbott, Jean Marçais, et al.. Constitution of a catchment virtual observatory for sharing flow and transport models outputs. Journal of Hydrology, Elsevier, 2016, RESIDENCE TIMES IN SUBSURFACE HYDROLOGICAL SYSTEMS: Signature of hydrological processes and impact on environmental applications, 543 (Part A), pp.59-66. ⟨10.1016/j.jhydrol.2016.04.067⟩. ⟨insu-01312759⟩
  • Tamara Kolbe, Jean Marçais, Zahra Thomas, Jean-Raynald de Dreuzy, Pauline Rousseau-Gueutin, et al.. Coupling 3D groundwater modeling with CFC-based age dating to classify local groundwater circulation in an unconfined crystalline aquifer. Journal of Hydrology, Elsevier, 2016, RESIDENCE TIMES IN SUBSURFACE HYDROLOGICAL SYSTEMS: Signature of hydrological processes and impact on environmental applications, 543 (Part A), pp.31-46. ⟨10.1016/j.jhydrol.2016.05.020⟩. ⟨insu-01316583⟩
  • C. Grimaldi, M. Fossey, Zahra Thomas, Y. Fauvel, P. Merot. Nitrate attenuation in soil and shallow groundwater under a bottomland hedgerow in a European farming landscape. Hydrological Processes, Wiley, 2012, 26 (23), pp.3570-3578. ⟨10.1002/hyp.8441⟩. ⟨hal-00849182⟩
  • Zahra Thomas, R. Ghazavi, P. Merot, A. Granier. Modelling and observation of hedgerow transpiration effect on water balance components at the hillslope scale in Brittany. Hydrological Processes, Wiley, 2012, 26 (26), pp.4001-4014. ⟨10.1002/hyp.9198⟩. ⟨hal-00849181⟩
  • R. Ghazavi, Zahra Thomas, Y. Hamon, P. Mérot. Soil water movement under a bottomland hedgerow during contrasting meteorological conditions. Hydrological Processes, Wiley, 2011, 25 (9), pp.1431-1442. ⟨10.1002/hyp.7909⟩. ⟨hal-00729280⟩
  • C. Grimaldi, Zahra Thomas, M. Fossey, Y. Fauvel, P. Mérot. High chloride concentrations in the soil and groundwater under an oak hedge in the West of France: an indicator of evapotranspiration and water movement. Hydrological Processes, Wiley, 2009, 23 (13), pp.1865-1873. ⟨10.1002/hyp.7316⟩. ⟨hal-00729222⟩
  • Zahra Thomas, Jérôme Molenat, Virginie Caubel, C. Grimaldi, P. Mérot. Spatial and temporal variations of water balance components due to a bottomland hedgerow.. Hydrological Processes, Wiley, 2008, 22 (5), pp.577-585. ⟨10.1002/hyp.6619⟩. ⟨hal-00729910⟩
  • M. Corson, G. Ghazavi, Y. Hamon, J.C. Marie, P. Mérot, et al.. Hedgerow impacts on soil-water transfer due to rainfall interception and root-water uptake.. Hydrological Processes, Wiley, 2008, 22 (24), pp.4723-4735. ⟨hal-00729866⟩
  • Zahra Thomas, Jérôme Molenat, Virginie Caubel, C. Grimaldi, P. Mérot. Simulating soil-water movement under a hedgerow surrounding a bottomland reveals the importance of transpiration in water balance. Hydrological Processes, Wiley, 2008, 22 (5), pp.577-585. ⟨10.1002/hyp.6619⟩. ⟨hal-00729907⟩
  • Gholamreza Ghazavi, Zahra Thomas, Yannick Hamon, Jean-Claude Marie, Michael Corson, et al.. Hedgerow impacts on soil-water transfer due to rainfall interception and root-water uptake. Hydrological Processes, Wiley, 2008, 22 (24), pp.577-585. ⟨10.1002/hyp.7081⟩. ⟨hal-01460891⟩

Conference papers20 documents

  • Luc Aquilina, Jean Marçais, Alexandre Gauvain, Tamara Kolbe, Jean-Raynald De Dreuzy, et al.. Quantifying shallow and deep groundwater inputs to rivers with groundwater dating in hydrological observatories.. European Geosciences Union General Assembly 2017, European Geosciences Union, Apr 2017, Vienne, Austria. pp.EGU2017-13730. ⟨insu-01510138⟩
  • Jean-Raynald de Dreuzy, Jean Marçais, Tamara Kolbe, Quentin Courtois, Laurent Longuevergne, et al.. Geomorphological control on groundwater flow, transit times and water quality. European Geosciences Union General Assembly 2017, European Geosciences Union, Apr 2017, Vienne, Austria. pp.EGU2017-11516. ⟨insu-01520836⟩
  • Benjamin W. Abbott, Gérard Gruau, Jay Zarneske, Lou Barbe, Sen Gu, et al.. The spatial structure and temporal synchrony of water quality in stream networks. European Geosciences Union General Assembly 2017, European Geosciences Union, Apr 2017, Vienne, Austria. pp.EGU2017-14163. ⟨insu-01510163⟩
  • Jean-Raynald de Dreuzy, Jean Marçais, Florentina Moatar, Camille Minaudo, Quentin Courtois, et al.. Concentration-discharge relationships to understand the interplay between hydrological and biogeochemical processes: insights from data analysis and numerical experiments in headwater catchments. American Geophysical Union Fall Meeting 2017, Dec 2017, New Orleans, United States. pp.H44A-05. ⟨insu-01734762⟩
  • Jean Marçais, Jean-Raynald de Dreuzy, Thierry Labasque, Benjamin W. Abbott, Alexandre Gauvain, et al.. Using dissolved silica to quantify transit times in aquifers and streams . American Geophysical Union Fall Meeting 2017, Dec 2017, New Orleans, United States. pp.H23E-1732. ⟨insu-01734764⟩
  • Tamara Kolbe, Benjamin W. Abbott, Zahra Thomas, Luc Aquilina, Aniet Laverman, et al.. Exposure Time Distributions reveal Denitrification Rates along Groundwater Flow Path of an Agricultural Unconfined Aquifer . American Geophysical Union Fall Meeting 2016, American Geophysical Union, Dec 2016, San Francisco, United States. pp.H32A-02. ⟨insu-01416962⟩
  • Nataline Simon, Olivier Bour, Mikaël Faucheux, Nicolas Lavenant, Ophélie Fovet, et al.. Caractérisation des échanges nappe/rivière sur un petit bassin-versant d’ordre 1 : apport des méthodes de mesures distribuées de température par fibre optique. 25 ème Réunion des sciences de la Terre (RST 2016), Société Géologique de France, Oct 2016, Caen, France. pp.295. ⟨insu-01388725⟩
  • Benjamin W. Abbott, Tamara Kolbe, Jean Marçais, Zahra Thomas, Luc Aquilina, et al.. Recharge and Topographical Controls on Groundwater Circulation in Shallow Crystalline Rock Aquifers revealed by CFC-based Age Data . American Geophysical Union Fall Meeting 2016, American Geophysical Union, Dec 2016, San Francisco, United States. pp.H21B-1395. ⟨insu-01417015⟩
  • Zahra Thomas, C. Chauvet, G. Carfantan, H. Andrieu, Jean-Raynald De Dreuzy. Towards a User- and Decentralized-driven urban water system modeling. 12th International Conference on Hydroinformatics, Aug 2016, Incheon, South Korea. ⟨insu-01451364⟩
  • Tamara Kolbe, Benjamin Abbot, Zahra Thomas, Jean-Raynald De Dreuzy, Camille Vautier, et al.. Coupling 3D groundwater modeling with CFC-based age dating to evaluate Residence Time Distribution. HydroEco 2015, Apr 2015, Vienne, Austria. 1 p. ⟨insu-01164701⟩
  • Jean-Raynald De Dreuzy, Tamara Kolbe, Jean Marçais, Zahra Thomas, Luc Aquilina, et al.. Characterization and predictive abilities of GroundWater age data . AGU Fall Meeting 2015, American Geophysical Union, Dec 2015, San Francisco, United States. pp.H24D-02. ⟨insu-01242069⟩
  • Zahra Thomas, Chantal Gascuel, Philippe Davy, N. Gilliet, R. Beral, et al.. Range of variations in stream temperature as a relevat indicator to characteristize the stream and groundwater temperature signals and their interaction. HydroEco'2013, May 2013, rennes, France. pp.39. ⟨insu-00823467⟩
  • Zahra Thomas, Jean-Raynald de Dreuzy, Philippe Davy, Tanguy Le Borgne, Olivier Bour. Simulation of plant surface and groundwater interaction using improved physically-based model. HydroEco'2013, May 2013, rennes, France. pp.176. ⟨insu-00823469⟩
  • Joachin Jimenez-Martinez, Laurent Longuevergne, Tanguy Le Borgne, Philippe Davy, Olivier Bour, et al.. A frequency domain analysis to characterize heterogeneity and recharge mechanisms in a fractured crystalline-rock aquifer. American Geophysical Union Fall Meeting 2011, Dec 2011, San Francisco, Californie, United States. pp.H51M-04. ⟨insu-00667843⟩
  • J. Jimenez-Martinez, L. Longuevergne, T. Le Borgne, P. Davy, O. Bour, et al.. A frequency domain analysis to characterize heterogeneity and recharge mechanisms in a fractured crystalline-rock aquifer. American Geophysical Union, Dec 2011, San Francisco (US), United States. ⟨hal-00745923⟩
  • Zahra Thomas, A. Bloux, Y. Hamon, F. Rouault. How do morphological characteristics of hillslope control water movement in the saturated and unsaturated zone. American Geophysical Union Fall Meeting, Dec 2011, San Francisco (US), United States. ⟨hal-00742013⟩
  • Zahra Thomas, P. Mérot. Interactions between hedgerow, soil and hydrology.. 2nd International.Conference BioHydrology 2009, Sep 2009, Bratislava (SK), Slovakia. ⟨hal-00729237⟩
  • Zahra Thomas, G. Ghazavi, P. Mérot. Spatial and temporal variations of water balance components due to a bottomland hedgerow. EGU General Assembly, Apr 2009, Vienne (AUT), Austria. ⟨hal-00730075⟩
  • C. Grimaldi, Zahra Thomas, M. Fossey, Y. Fauvel, Philippe Mérot. Chloride accumulation in the soil and groundwater under a bottomland oak hedge. Hydro Eco'2009, Apr 2009, Vienne (AUT), Austria. ⟨hal-00729970⟩
  • Didier Michot, I. Adam, G. Ghazavi, Zahra Thomas. Electrical resistivity tomography monitoring of water deficit along pedological toposequence related to hedgerow.. EUROSOIL 2008, Aug 2008, Vienne (AUT), Austria. ⟨hal-00729127⟩

Poster communications6 documents

  • Rebecca Frei, Benjamin W. Abbott, Rémi Dupas, Sen Gu, Gérard Gruau, et al.. Using Biogeochemical Tracers to Quantify Catchment Resilience to Nutrient Loading. American Geophysical Union 2018, Fall Meeting, Dec 2018, Washington, United States. pp.B21I-2436, 2018. ⟨insu-01927903⟩
  • Hugo Le Lay, Zahra Thomas, Francois Rouault, Pascal Pichelin, Olivier Bour, et al.. Assessment of injected warm plumes along a free surface flow channel using fiber-optic distributed temperature sensing and numerical simulations. European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-14509, 2017. ⟨insu-01534089⟩
  • Tamara Kolbe, Jean-Raynald De Dreuzy, Benjamin W. Abbott, Jean Marçais, Tristan Babey, et al.. Relative importance of time, land use and lithology on determining aquifer-scale denitrification. European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-14279, 2017. ⟨insu-01534021⟩
  • Camille Vautier, Eliot Chatton, Benjamin W. Abbott, Astrid Harjung, Thierry Labasque, et al.. Continuous monitoring of dissolved gases with membrane inlet mass spectrometry to fingerprint river biochemical activity. European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-18358-1, 2017. ⟨insu-01534016⟩
  • Zahra Thomas, Pauline Rousseau-Gueutin, Tamara Kolbe, Benjamin W. Abbott, Jean Marçais, et al.. Catchment virtual observatory for sharing flow and transport models outputs: using residence time distribution to compare contrasting catchments. European Geosciences Union General Assembly 2017, Apr 2017, Vienne, Austria. Geophysical Research Abstracts, 19, pp.EGU2017-13885, 2017. ⟨insu-01534026⟩
  • Jean-Raynald De Dreuzy, Tamara Kolbe, Jean Marçais, Zahra Thomas, Luc Aquilina, et al.. Does Increasing Complexity Improve the Performance of Groundwater-Surface Water Models? . AGU Fall Meeting 2015, Dec 2015, San Francisco, United States. pp.H43C-1509. ⟨insu-01242071⟩