Introduction Paragraph: our-Tsyh (George) Yeh received his Ph.D. in hydrology from Cornell University in 1969 and M. S. in hydraulics from Syracuse University in 1967. His areas of specialty are hydrology, environmental fluid mechanics, hydraulics, and water resources. Dr. Yeh has extensive experience in multidisciplinary research, teaching, professional services, and coordination skills. He specializes in the mathematical formulation of complex physical transport and biogeochemical reactions and their computer implementations.

His current research focuses on physics-based first principle approaches of watershed modeling, coupled surface and subsurface flow and transport processes, geochemical kinetics, biodegradation and micro-organism/geochemical interactions, geochemical equilibrium modelling, multi-phase flow and transport in both fractured and porous media, development of innovative numerical algorithms, and computational fluid dynamics. He has been actively promoting scientific knowledge exchange, crusading for technology transfer of sponsored research, and conducting workshops and short courses. Achievements in his career include:

• Developed over 100 physics-based process-level computational models: many of which has been adopted as the de facto standard by academic communities, federal agencies, and industries
• Conducted more than 40 interdisciplinary research projects with a total funding of over $8,000,000
• Published two books and more than 200 papers, technical reports, and conference proceedings
• Received Presidential PIP Award, Martin Marietta Publication Award, NRC Research Associateship, NRC Senior Research Associateship, and PSES Outstanding Research Award
• Completed over 40 consulting jobs for over 30 clients
• Offered short courses, seminars, and workshops many times on subsurface flow and reactive chemical transport
• Organized and chaired more than 10 salient national and international symposia
• Advised and supervised over 25 Ph.D. and M.S. students at University of Central Florida and Penn State in 12 years