Satoshi Tajima

Satoshi Tajima, PhD

Hydrogeologist @University of Neuchâtel / University of Bern

E-mail: satoshi.tajima[at]unine.ch

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Satoshi Tajima is Postdoctoral Fellow at the Centre for Hydrogeology and Geothermics, University of Neuchâtel, and at the Physics Institute, University of Bern. He earned his PhD from the University of Tokyo in 2025. He studies the physical dynamics of flow and transport in the coastal surface–subsurface continuum, as well as stochastic and nonlinear solute transport processes in porous media, primarily through numerical modeling.

News

  • 2025-11-29: Released a preprint of a review paper.
    This transdisciplinary review synthesizes hydrogeological background, climate change impacts, and adaptation strategies to support sustainable groundwater management in the Pacific Islands, outlining key considerations for designing and implementing effective, and context-relevant adaptation measures.
  • 2025-11-09: Published a paper in Water Resources Research.
    In this study, we show that the interplay of heterogeneity, buoyancy, and tidal fluctuations in coastal aquifers generates chaotic and periodic flow orbits within the freshwater–saltwater transition zone. These orbits both trap solute particles and enhance mixing between freshwater- and seawater-derived solutes. The findings have broad implications, including long-term contamination risks in coastal aquifers, potential influences on marine ecosystems from altered submarine groundwater discharge characteristics, and the formation of hotspots for subsurface chemical and biological reactions.
  • 2025-09-11: Released a preprint .
    This study reports on how climate-change-driven shifts in the intensity and frequency of storm surges influence the recovery of coastal aquifers after repeated surges and the associated vertical seawater intrusion.
  • 2025-06-14: Published a paper in Advances in Water Resources.
    In this study, we found that the combination of heterogeneity and transient forcing produces complex flow patterns, with stable regions that promote solute containment and chaotic regions that enhance mixing simultaneously. These results have important implications for assessing seawater intrusion in coastal aquifers and for designing effective strategies for groundwater remediation and geological storage.