In field studies, he has expertise in monitoring subsurface flow and transport, particularly through developing novel methods for measuring hydraulic potentials in tandem with spatially resolved fluid sampling. His research accomplishments in the area of flow and transport include identifying a novel molecular free-path distribution model for gas diffusion in porous media, identifying scale limits for capillary hysteresis, the permeability-imbibition scaling relation, the importance of water film hydraulics in multiphase fluid flow, modeling and measurements of brine film thicknesses under confinement by supercritical CO 2, experimentally identifying uncertainties associated with scaling predictions of capillary pressure-saturation relations for supercritical CO 2-brine in porous media, showing that infiltration paths in talus rocks evolve towards a Boltzmann (geometric) distribution, measuring multiphase fluid equilibrium and flow in low permeability shales, and measuring solute diffusion through adsorbed water films. Tetsu TokunagaвЂ™s research combines soil physics with related fields of hydrogeology and biogeochemistry. He currently has over 120 publications in peer-reviewed journals. In addition to his research at LBNL, he taught soil physics at the University of California, Berkeley (1990, 1992).

Upon graduation (Ph.D., Soil Science, 1986), he continued at LBNL conducting laboratory and field-based studies on flow and transport problems in soils and geologic media.

While conducting his graduate studies on gas diffusion in porous media at the University of California, Berkeley, he began working at LBNL (1981) as a graduate student on unsaturated flow and transport from uranium mill tailings, and on reactive transport of selenium in contaminated wetland (Kesterson Reservoir). Tetsu Tokunaga is a Senior Scientist (semi-retired) in the Energy Geosciences Division of Lawrence Berkeley National Laboratory, studying the physicochemical basis of environmental transport processes. National Alliance for Water Innovation (NAWI).Resilient Energy, Water & Infrastructure.Carbon Removal & Mineralization Program.

Basic Energy Sciences (BES) Geochemistry.Environmental Remediation & Water Resources.Environmental & Biological Systems Science.S&E Metrics for Performance and Promotion.

Shiori tokunaga