Dr. Thomas Kretzschmar is a Senior Researcher (Investigador Titular B) and National Research System (SNI) Level III member at the Department of Geology, CICESE (Ensenada Center for Scientific Research and Higher Education), Mexico. His expertise lies in hydrogeology andhydrogeochemistry, with a particular focus on aquifer development, water balance assessments, and hydrogeochemical processes.He earned his Ph.D. in Geology from the Eberhard Karls University of Tübingen, Germany.

Dr. Kretzschmar has participated in several CONACYT-funded projects, including sustainable water management in the Guadalupe River basin, and has collaborated with the European Community on hydrogeological modeling of geothermal systems in Los Humeros and Acoculco.He coordinated the specialized laboratory system of CEMIE-Geo, strengthening the analytical capacities for the study of geothermal resources.He has supervised more than 40 undergraduate, master’s, and Ph.D. students, contributing significantly to the training of professionals in integrated water resources management.

• Hydrogeology
• Hydrogeochemistry
• Water Quality
• Hydrogeological Modeling
• Geothermal Energy
• The Sustainable Use of Water Resources

• Kretzschmar, T. G., Aguilar-Ojeda, J. A., Iñiguez, E., Ávila-Olivera, J. A., Cañas-Ramírez, J. C., García-Sánchez, B. E.& Vara-Castro, G. M.(2025). Recharge area estimation by block and mountain front for the Los Humeros Geothermal Field, Puebla, Mexico: Advancing the conceptual model. Journal of South American Earth Sciences, 155,105411,https://doi.org/10.1016/j.jsames.2025.105411.
• De la Fraga, P., DelToroGuerrero, F. J.,Vivoni, E. R., Cavazos, T.& Kretzschmar, T. (2024). Evaluation of gridded precipitation datasets in mountainous terrains of Northwestern Mexico. JournalofHydrology: Regional Studies, 56, 102019. doi.org/10.1016/j.ejrh.2024.102019.
• García Sánchez B.E., Vara Castro G.M., Kretzschmar T.G., & Sanchez Avila J.I. (2022). Organic compounds in surface and groundwaters in the surrounding of a Mexican geothermal reservoir; case study Los Humeros, Puebla. Applied Geochemistry, 147. doi: 10.1016/j.apgeochem.2022.105442.
• Lelli M., Kretzschmar T.G., Cabassi Jacopo, D.M., Sanchez Avila J.I., Gherardi F., Magro G., & Norelli F. (2021). Fluid geochemistry of the Los Humeros geothermal field (LHGF - Puebla, Mexico): New constraints for the conceptual model. Geothermics, 90. doi: 10.1016/j.geothermics.2020.101983.
• Batista Cruz R.Y., Peiffer L. M. J. C. J. G., Weber B., Herguera García J.C., Liotta M., González Fernández A., Barragan R.M., & Kretzschmar T.G. (2020). Geochemical characteristics of pore waters from sediment cores of the Wagner Basin, Gulf of California. Applied Geochemistry. 113. doi: 10.1016/j.apgeochem.2019.104467.

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