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John Nimmo

Research Physicist

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Short Biography


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, and climate-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.

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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. [Link]

Nimmo, John R., 2012. Preferential flow occurs in unsaturated conditions. Wiley , 4 p. [Link]

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 [Link]

Mirus, Benjamin B.; Perkins, Kim S.; Nimmo, John R., 2011. Assessing controls on perched saturated zones beneath the Idaho Nuclear Technology and Engineering Center, Idaho. U.S. Geological Survey Scientific Investigations Report 2011-5222, vi, 20 p. [Link]

Perkins, K. S.; Nimmo, J. R.; Rose, C. E.; Coupe, R. H. , 2011. Field tracer investigation of unsaturated zone flow paths and mechanisms in agricultural soils of northwestern Mississippi, USA. ,

Ebel, Brian A.; Nimmo, John R., 2010. Hydraulic Property and Soil Textural Classification Measurements for Rainier Mesa, Nevada Test Site, Nevada. U.S. Geological Survey Open-File Report 2009-1264, iv, 17 p. [Link]

Ebel, Brian A.; Nimmo, John R., 2009. Estimation of Unsaturated Zone Traveltimes for Rainier Mesa and Shoshone Mountain, Nevada Test Site, Nevada, Using a Source-Responsive Preferential-Flow Model. U.S. Geological Survey Open-File Report 2009-1175, vi, 74 p. [Link]

Nimmo, J. R.; Perkins, K. S. , 2008. Effect of soil disturbance on recharging fluxes: Case study on the Snake River Plain, Idaho National Laboratory, USA. ,

Rousseau, Joseph P.; Landa, Edward R.; Nimmo, John R.; Cecil, L. DeWayne; Knobel, LeRoy L.; Glynn, Pierre D.; Kwicklis, Edward M.; Curtis, Gary P.; Stollenwerk, Kenneth G.; Anderson, Steven R.; Bartholomay, Roy C.; Bossong, Clifford R.; Orr, Brennon R., 2005. Review of the transport of selected radionuclides in the interim risk assessment for the Radioactive Waste Management Complex, Waste Area Group 7 Operable Unit 7-13/14, Idaho National Engineering and Environmental Laboratory, Idaho. Scientific Investigations Report 2005-5026, 283 p. in two volumes (211 p. in volume 1 and 72 p. in volume 2) [Link]

Heppner, Christopher S.; Nimmo, John R., 2005. A computer program for predicting recharge with a master recession curve. Scientific Investigations Report 2005-5172, 10 p. [Link]

Perkins, K. S.; Nimmo, J. R., 2000. Measurement of hydraulic properties of the B-C interbed and their influence on contaminant transport in the unsaturated zone at the Idaho National Engineering and Environmental Laboratory, Idaho. Water-Resources Investigations Report 2000-4073, 30 p.

Nimmo, J. R.; Shakofsky, S. M.; Kaminsky, J. F.; Lords, G. S., 1999. Laboratory and field hydrologic characterization of the shallow subsurface at Idaho National Engineering and Environmental Laboratory waste-disposal site. Water-Resources Investigations Report 99-4263, 31 p.

Perkins, K. S.; Nimmo, J. R.; Pittman, J. R. , 1998. Hydrologic and meteorological data for an unsaturated-zone study area near the Radioactive Waste Management Complex, Idaho National Engineering and Environmental Laboratory, Idaho, 1990-96. U.S. Dept. of the Interior, U.S. Geological Survey ; Information Services [distributor], Open-File Report 98-9, iv, 13 p. :ill., maps ;28 cm. +1 computer laser optical disc.


My Science Topics

Science Topic
Ecology and Environmenthabitat alteration
Environmental Issuescontamination and pollution
Ecology and Environmentecosystem functions
Ecology and Environmentforests
Ecology and Environmentdeserts
Environmental Issueshuman impacts
Environmental Issuesland use
Environmental Issueswaste treatment and disposal
Hydrologic Processesground-water flow
Hydrologic Processesground-water level
Hydrologic Processeshydrology
Hydrologic Processespercolation
Natural Resourcessoil resources
Natural Resourceswater resources
Plants and Animalsflowering plants
Plants and Animalsplants
Plants and Animalsvegetation
Techniques and Methodsfield methods
Techniques and Methodslaboratory methods
Techniques and Methodsmathematical modeling
Water Resourcesaquifers
Water Resourcesground water
Water Resourcesground-water quality
Water Resourcesirrigation
Water Resourcesmovement and recharge
Water Resourceswater properties
Water Resourceswater quality

My USGS Science Strategy Areas

Understanding Ecosystems & Predicting Ecosystems Change

The Role of Environment and Wildlife in Human Health

Climate Variability & Change

A Water Census of the United States

Unsaturated Flow Processes

Contact Information

John Nimmo
345 Middlefield Road
Menlo Park, CA 94025
650-329-4538 - Fax
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