Satoshi Tajima, PhD
Hydrogeologist @University of Neuchâtel / University of Bern
E-mail: satoshi.tajima[at]unine.ch
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. Drawing on international research experience in Switzerland, Spain, and Japan, he studies surface water–groundwater interactions in coastal environments and the stochastic dynamics of solute transport in porous media, primarily through numerical modelling.
田嶋 智（たじま さとし）
スイス・ヌーシャテル大学 水文地質学・地球熱学センター／ベルン大学 物理学研究所 ポストドクトラル・フェロー
専門は地圏水文学。沿岸域における地表水と地下水の相互作用や、多孔質媒体における溶質輸送現象を主な研究対象とし、特に数値解析を中心とした理論的・概念的アプローチに強みを持つ。科学技術政策にも関心があり、洋上風力導入に伴う社会的影響に関する研究も行っている。博士（環境学）。
スイス・ヌーシャテル大学 水文地質学・地球熱学センター／ベルン大学 物理学研究所 ポストドクトラル・フェロー
専門は地圏水文学。沿岸域における地表水と地下水の相互作用や、多孔質媒体における溶質輸送現象を主な研究対象とし、特に数値解析を中心とした理論的・概念的アプローチに強みを持つ。科学技術政策にも関心があり、洋上風力導入に伴う社会的影響に関する研究も行っている。博士（環境学）。
News
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2025-11-09
Published a paper in Water Resources Research.
In this study, we show that the interplay of heterogeneity, buoyancy, and transient forcing 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 new 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.