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Home > Introduction of our tenure-track faculties > BOULANGE Julien Eric Stanislas

Introduction of our tenure-track faculties

BOULANGE Julien Eric Stanislas

Affiliation Institute of Agriculture
Division Division of International Environmental and Agricultural Science
Research field Environmental change modelling
Keyword(S) Hydrology, Water-Food Nexus, Global Sustainability
Research experience

・April 2013 – March 2016: Tokyo University of Agriculture and Technology, post-doc
・April 2016 – March 2017: Meiji University, post-doc
・April 2017 – March 2022: Center for Climate Change Adaptation, National Institute for Environmental Studies, Research Associate
・April 2022 – August 2022: SIT Research Laboratories, Shibaura Institute of Technology, Research Associate professor
・September 2022 – current: Tokyo University of Agriculture and Technology, Research Division of International Environmental and Agricultural Science, Associate professor

Educational background

・July 2005: Lycée Félix Le Dantec, Math specialty, Lannion, France (B.Sc)
・July 2007: Ecole Préparatoire PTSI, Lycée Vauban, Brest, France
・September 2009: Grenoble Institute of Technology, Polytech Grenoble, Grenoble, France (engineer degree; equivalent to Master)
・March 2013: Tokyo University of Agriculture and Technology (Ph.D)


・2011: Scholarship awarded by the Rhone Alpes Region (France)
・2012: One year scholarship granted by the Takase Scholarship Foundation (Japan)
・2012: Poster Award, IUPAC conference on Polymer and organic
Chemistry, Beijing (China)
・2012: Paper award, “Probabilistic assessment of herbicide runoff from Japanese rice paddies: The effects of local meteorological conditions and site-specific water management”

Selected papers and publications

・Satoh, Y., Yoshimura, K., Pokhrel, Y., Kim, H., Shiogama, H., Yokohata, T., Hanasaki, N., Wada, Y., Burek, P., Byers, E., Schmied, H. M., Gerten, D., Ostberg, S., Gosling, S. N., Boulange J., Oki T., “The timing of unprecedented hydrological drought under climate change”, Nature Communications, 13 3287 (2022)
・Gassman, P. W., Jeong, J., Boulange, J., Narasimhan, B., Kato, T., et al., “Simulation of rice paddy systems in SWAT: A review of previous applications and proposed SWAT+ rice paddy module”, International Journal of Agricultural and Biological Engineering, 15(1), 1–24 (2022)
・Modi, P., Hanasaki, N., Yamazaki, D., Boulange, J., Oki, T., “Sensitivity of subregional distribution of socioeconomic conditions to the global assessment of water scarcity”, Communications Earth Environment, 144 (2022)
・Yoshida, T., Hanasaki, N., Nishina, K., Boulange, J., Okada, M., Troch, P. A., “Inference of Parameters for a Global Hydrological Model: Identifiability and Predictive Uncertainties of Climate-Based Parameters”, Water Resources Research, 58(2), (2022)
・Yunus, A. P., Masago, Y., Boulange, J., Hijioka, Y., “Natural and anthropogenic forces on suspended sediment dynamics in Asian estuaries”, Science of The Total Environment, 836, 155569 (2022)
・Kassaye, K. T., Boulange, J., Kurebito, S., Tokunari, T., Saito, H., Watanabe, H., “The role of biochar in improving soil properties, water retention and potato yield in a Fluvisol under temperate monsoon climate”, Soil Use and Management, 38(1), 1069-1083 (2022)
・Pokhrel, Y., Felfelani, F., Satoh, Y., Boulange, J., Gädeke, A., et al., “Global Terrestrial Water Storage and Drought Severity under Climate Change”, Nature Climate Change, 11, 226–233 (2021)
・Gudmundsson, L., Boulange, J., Do, H. X., Gosling, S. N., Grillakis, M. G., et al., “Globally observed trends in mean and extreme river flow attributed to climate change”, Science, 371(6534), 1159–1162 (2021)
・Tu, L. H., Boulange, J., Phong, T. K., Thuyet, D. Q., Watanabe, H., Takagi, K., “Predicting rice pesticide fate and transport following foliage application by an updated PCPF-1 model,” Journal of Environmental Management, 277 111356 (2021)
・Mark, A. D. C., Nakamura, S., Hanasaki, N., Boulange, J., “Integrated Evaluation of Changing Water Resources in an Active Ecotourism Area: The Case of Puerto Princesa City, Palawan, Philippines”, Sustainability, 13(9) 4826 (2021)
・Satoh, Y., Shiogama, H., Hanasaki, N., Pokhrel, Y., Boulange, J., et al., “A quantitative evaluation of the issue of drought definition: a source of disagreement in future drought assessments”, Environmental Research Letters, 16(10) 104001 (2021)
・Telteu, C. E., Schmiedd, M. H., Thiery, W., Leng, G., Burek, P., Liu X., Boulange J., et al., “Understanding each other’s models: an introduction and a standard representation of 16 global water models to support intercomparison, improvement, and communication”, Geosci. Model Dev., 14(6), 3843–3878 (2021)
・Boulange J., Hanasaki N., Satoh Y., Yokohata T., Shiogama H., Burek P., Thiery W., Gerten D., et al., “Validity of estimating flood and drought characteristics under equilibrium climates from transient simulations”, Environmental Research Letters, 16 (10) 104028 (2021)
・Boulange, J., Hanasaki, N., Yamazaki, D., Pokhrel, Y., “Role of dams in reducing global flood exposure under climate change,” Nature Communications, 12 (2021)
・Kassaye, K. T., Boulange, J., Tu, L. H., Saito, H., Watanabe, H., “Soil water content and soil temperature modeling in a vadose zone of Andosol under temperate monsoon climate”, Geoderma, 384, 114797 (2021)
・Kassaye, K. T., Boulange, J., Lam, V. T., Saito, H., Watanabe, H., “Monitoring soil water content for decision supporting in agricultural water management based on critical threshold values adopted for Andosol in the temperate monsoon climate”, Agricultural Water Management, 229, 105930 (2020)
・Boulange, J., Malhat, F., Jaikaew, P., Nanko, K., Watanabe, H., “Portable rainfall simulator for plot-scale investigation of rainfall-runoff, and transport of sediment and pollutants”, International Journal of Sediment Research 34(1), 38–47 (2019)
・Kassaye, K. T., Boulange, J., Saito, H., Watanabe, H., “Calibration of capacitance sensor for Andosol under field and laboratory conditions in the temperate monsoon climate”, Soil and Tillage Research, 189, 52–63 (2019)
・Liu, X., Tang, Q., Liu, W., Veldkamp, T. I., Boulange, J., Liu, J., Wada, Y., Huang, Z., Yang, H., “A Spatially Explicit Assessment of Growing Water Stress in China From the Past to the Future”, Earth’s Future, 7(9), 1027–1043 (2019)
・Boulange, J., Hanasaki, N., Veldkamp, T., Schewe, J., Shiogama, H., “Magnitude and robustness associated with the climate change impacts on global hydrological variables for transient and stabilized climate states”, Environmental Research Letters, 13(6) 064017 (2018)
・Boulange, J., Malhat, F., Thuyet, D. Q., Watanabe, H., “PCPF-M model for simulating the fate and transport of pesticides and their metabolites in rice paddy field”, Pest Management Science, 73, 2429–2438 (2017)

Research Description

Global population growth and increasing standards of living are contributing to the expansion and intensification of global agricultural systems to fulfil growing demands for food, biofuel, and other commodities. Concurrently, the intensification of the hydrological cycle, owing to anthropogenic global warming, is already impacting the availability of water supply, profoundly affecting food production.
The impacts of future flood risk, anticipated to increase in the future, were demonstrated at the global scale. However, flood risk assessments emphasize the economic consequence of flooding on urban areas and national infrastructures while flood impacts on agricultural land have received less attention. In addition, flooding events present a potentially hazardous public health risk and crops submerged in floodwater may be contaminated with sewage, chemicals, heavy metals, or other pollutants, making them improper for consumption.
Research activities range from targeted climate change impact analysis to complex multi-model frameworks aiming at understanding the effects of anthropological activities and climate change onto water resources and agricultural systems.
More specifically, our laboratory aims at 1) determining trade-offs and synergies for sustainably managing water and agricultural systems within the context of flooding, under climate change and 2) gradually integrating water quality into global flood models.

About TUAT's tenure-track program

The tenure-track program of Tokyo University of Agriculture and Technology (TUAT) is fostering a new generation of young and talented researchers. My gradual involvement for supporting the university enable me to establish a strong and independent laboratory while pursuing the establishment of productive international research networks. The program further stimulates active collaboration within the university via regular meetings, providing start-up funds, and assigning mentor faculty members.

Future aspirations

I am actively working on global and large-scale simulations that fully integrate anthropological activities with the water cycle. By investigating the delicate balance and trade-offs within the food-energy-water nexus, I primarily contribute to the Intergovernmental Panel on Climate Change (IPCC). I mainly focus on identifying the role of agriculture in mitigating flood risk, under climate change. My research also strongly aligns with the Sustainable Development Goals (SDGs) for: 1) identifying productive agricultural systems resilient to climate change, and 2) minimizing water pollution from agricultural systems while remaining compatible with the global increase in food-energy-water demands.