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Scientist at INRAE / SAS Phone: (+33) 2 23 48 52 48  Email: laurent.ruiz@inrae.fr Address: Indo-French Cell of Water Science, Indian Institute of Sciences, Bangalore, India Fields of expertise: agronomy, hydrology Keywords: catchment hydrology, Critical Zone science, agro-ecosystems, diffuse pollutions, modelling

Research

My research interest is to understand and model at the catchment scale interactions between water resources and climatic and anthropogenic forcings, especially agriculture. I explore how multidisciplinary approaches, spanning hydrology, agronomy, geochemistry, remote sensing and social sciences, can help to design better management of water and nutrient cycles in agro-ecosystems.
My work relies primarily on long-term observations carried out within Critical Zone Observatories in France (AgrHys) and India (M-TROPICS).

• ATCHA : Accompanying The adaptation of irrigated agriculture to climate CHAnge (2017-2021)
• CSIA : Transport and Transformation of Pesticides from an Indian agrosystem: Insights from Compound-Specific Isotope Analysis (2018-2023)

• Involved in research infrastructures: OZCAR-RI in France and eLTER-RI elsewhere in Europe
• 2014-present: Associate Editor of Hydrological Sciences Journal (HSJ)
• 2018-present: Co-chairman of the Indo-French Cell of Water Science CEFIRSE, IISc, Bangalore, India

Productions

Buvaneshwari, S., Riotte, J., Sekhar, M., Sharma, A.K., Helliwell, R., Kumar, M.M., Braun, J.J. and Ruiz, L., 2020. Potash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture. Scientific Reports, 10(1), 3691, pp.1-14. https://doi.org/10.1038/s41598-020-60365-z

Fovet, O., L. Ruiz, G. Gruau, N. Akkal, L. Aquilina, S. Busnot, R. Dupas, P. Durand, M. Faucheux, Y. Fauvel, C. Fléchard, N. Gilliet, C. Grimaldi, Y. Hamon, A. Jaffrezic, L. Jeanneau, T. Labasque, G. Le Henaff, P. Mérot, J. Molénat, P. Petitjean, A. Pierson-Wickmann, H. Squividant, V. Viaud, C. Walter, and C. Gascuel-Odoux. 2018. AgrHyS: An Observatory of Response Times in Agro-Hydro Systems. Vadose Zone J. 17:180066. https://doi.org/10.2136/vzj2018.04.0066

Chitra-Tarak R., Ruiz L., Dattaraja H. S., Kumar M.S.M., Riotte J., Suresh H. S., McMahon S.M., Sukumar R. (2018) The roots of the drought: Hydrology and water uptake strategies mediate forest-wide demographic response to precipitation. J. Ecol. 106, 1495–1507. https://doi.org/10.1111/1365-2745.12925

Sharma, A., Hubert-Moy, L., Buvaneshwari, S., Sekhar, M., Ruiz, L., Bandyopadhyay, S., & Corgne, S. (2018). Irrigation history estimation using multitemporal Landsat satellite Images: application to an intensive groundwater irrigated agricultural watershed in India. Remote Sensing, 10(6), 893. http://dx.doi.org/10.3390/rs10060893

Buvaneshwari S, Riotte J, Sekhar M, Mohan Kumar MS, Sharma AK, Duprey JL, Audry S, Giriraj PR, Yerabham P, Moger H, Durand P, Braun JJ and Ruiz L (2017) High spatial variability of nitrate contamination in the hard rock aquifer of an irrigated catchment: Implications for water resource assessment. Sci. Tot. Env. 579, 838-847. http://dx.doi.org/10.1016/j.scitotenv.2016.11.0173.

Robert M., Thomas A., Sekhar M., Badiger S., Ruiz L., Willaume M., Leenhardt D. and Bergez J.-E. (2017) Farm Typology in the Berambadi Watershed (India): Farming Systems Are Determined by Farm Size and Access to Groundwater. Water 2017, 9, 51; http://dx.doi.org/10.3390/w9010051

Hrachowitz, M., Fovet, O., Ruiz, L., and Savenije, H. H. G., 2015. Transit time distributions, legacy contamination and variability in biogeochemical 1/fα scaling: how are hydrological response dynamics linked to water quality at the catchment scale?, Hydrological Processes, 29, 5241-5256. https://doi.org/10.1002/hyp.10546

Ruiz L., Sekhar et al. 2015 Adaptation of Irrigated agriculture to climate CHAnge:: trans-disciplinary modelling of a watershed in South India.  IAHS Publ. 366, http://dx.doi.org/10.5194/piahs-366-137-2015

Levain Alix, Vertès Françoise, Ruiz Laurent, Delaby Luc, Gascuel-Odoux Chantal, Barbier Marc 2015 ‘I am an intensive guy’: The possibility and conditions of reconciliation through the ecological intensification framework. Environmental Management. 56 (5), 1184-1198. http://dx.doi.org/10.1007/s00267-015-0548-3

Fovet O., Ruiz L., Faucheux M., Molénat J., Sekhar M., Vertès F., Aquilina L., Gascuel-Odoux C. and Durand P. (2015) Using long time series of agricultural-derived nitrates pollutions for estimating catchment transit times. Journal of Hydrology, 522, 603–617. http://dx.doi.org/10.1016/j.jhydrol.2015.01.030