Physics Experts

John R Nimmo

The U.S. Geological Survey
United States Virgin Islands


John Nimmo is a Research Physicist working toward establishment of a sound twenty-first century framework of water flow processes in soils and rocks. His specialty is the unsaturated zone, between the land surface and the water table. Applications of his work include aquifer recharge estimation, contaminant transport, ecohydrology, land-use evaluation, andclimate-change. As Lead Scientist for Unsaturated Flow Processes, he supervises a research group at the USGS that pursues these objectives through field and lab experiments, mathematical modeling, and development of unsaturated-flow theory.

Research Interest

unsaturated zone hydrology aquifer recharge infiltration percolation contamination and pollution


  • Nimmo, John R., 2012. Response to Masciopinto's Comment on "Theory for source-responsive and free-surface film modeling of unsaturated flow". Soil Science Society of America , Soil Science Society of America

  • Nimmo, John R., 2012. Preferential flow occurs in unsaturated conditions. Wiley , 4 p

  • Perkins, Kimberlie S.; Nimmo, John R.; Medeiros, Arthur C., 2012. Effects of native forest restoration on soil hydraulic properties, Auwahi, Maui, Hawaiian Islands. American Geophysical Union , 4 p.

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