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Hank Johnson

Team Lead-Hydrologist

Contact Info

Short Biography

Hank Johnson is a hydrologist with the U.S. Geological Survey at the Oregon Water Science Center in Portland, Oregon. He received his M.S. in Environmental Science and Engineering from Oregon Graduate Institute in 1996, and a B.S. in Geology from Virginia Tech (1992). Mr. Johnson joined the USGS as a student in 1996 to help develop a ground-water flow model for the upper Deschutes River basin in Oregon. He has spent much of his career studying the fate and transport of agricultural chemicals in surface and ground water through field studies and modeling. He has worked with the National Water Quality Assessment Program (NAWQA) since 1999. Mr. Johnson is currently a member of the NAWQA surface water trends team, a diverse group of environmental chemists, statisticians, and ecologists working to quantify and explain trends in nutrients, carbon, sediment, pesticides, and major ions in streams across the United States.

Current Studies

Water-Quality Analyst, Surface Water Trends Team, National Water-Quality Assessment Program (NAWQA)


Miller, M.P., Johnson, H.M., Susong, D.D., and Wolock, D.M., 2015, A new approach for continuous estimation of baseflow using discrete water quality data: Method description and comparison with baseflow estimates from two existing approaches: Journal of Hydrology, v. 522, p. 203-210. [Link]

Wise, D.R., and Johnson, H.M., 2013, Application of the SPARROW model to assess surface-water nutrient conditions and sources in the United States Pacific Northwest: U.S. Geological Survey Scientific Investigations Report 2013-5103, 32 p. [Link]

Domagalski, J.L., and Johnson, H.M., 2012, Phosphorus and Groundwater: Establishing Links Between Agricultural Use and Transport to Streams: U.S. Geological Survey Fact Sheet 2012-3004, 4 p. [Link]

Domagalski, J.L., and Johnson, H.M., 2011, Subsurface transport of orthophosphate in five agricultural watersheds, USA: Journal of Hydrology, v. 409, no. 1-2, p. 157-171. [Link]

Wise, D.R., and Johnson, H.M., 2011, Surface-water nutrient conditions and sources in the United States Pacific Northwest: Journal of the American Water Resources Association, v. 47, no. 5, p. 1110-1135. [Link]

Johnson, Henry M., Joseph L. Domagalski, and Dina K. Saleh, 2010. Trends in Pesticide Concentrations in Streams of the Western United States, 1993-2005: Journal of the American Water Resources Association (JAWRA), v. 47, no. 2, 265-286. [Link]

McCarthy, Kathleen A., and Johnson, Henry M., 2009, Effect of agricultural practices on hydrology and water chemistry in a small irrigated catchment, Yakima River basin, Washington: U.S. Geological Survey Scientific Investigations Report 2009-5030, 22 p [Link]

Waite, Ian R., Sobieszczyk, Steven, Carpenter, Kurt D., Arnsberg, Andrew J., Johnson, Henry M., Hughes, Curt A., Sarantou, Michael J., and Rinella, Frank A., 2008, Effects of urbanization on stream ecosystems in the Willamette River Basin and surrounding area, Oregon and Washington: U.S. Geological Survey Scientific Investigations Report 2006-5101-D, 62 p. [Link]

Green, Christopher T., Puckett, Larry J., Böhlke, John Karl, Bekins, Barbara A., Phillips, Steve P., Kauffman, Leon J., Denver, Judith M., Johnson, Henry M., 2008, Limited occurrence of denitrification in four shallow aquifers in agricultural areas of the United States: Journal of Environmental Quality, v. 37, no. 3, p. 994-1009. [Link]

Puckett, Larry J., Zamora, Celia, Essaid, Hedeff, Wilson, John T., Johnson, Henry M., Brayton, Michael J., and Vogel, Jason R., 2008, Transport and fate of nitrate at the ground-water/surface water interface: Journal of Environmental Quality, v. 37, no. 3, p. 1034-1050. [Link]

Steele, Gregory V., Johnson, Henry M., Sandstrom, Mark W., Capel, Paul D., Barbash, Jack E., 2008, Occurrence and fate of pesticides in four contrasting ground-Water systems: Journal of Environmental Quality, v. 37, no. 3, p. 1116-1132. [Link]

Johnson, Henry. M, 2007, Factors affecting the occurrence and distribution of pesticides in the Yakima River basin, Washington, 2000: U.S. Geological Survey Scientific Investigations Report 2007-5180, 34 p. [Link]

Payne, Karen L., Johnson, Henry M., and Black, Robert W., 2007, Environmental setting of the Granger Drain and DR2 basins, Washington, 2003-2004: USGS Scientific Investigations Report 2007-5102, 26 p. [Link]

Fuhrer, G.J., Morace, J.L., Johnson, H.M., Rinella, J.F., Ebbert, J.C., Embrey, S.S., Waite, I.R., Carpenter, K.D., Wise, D.R., and Hughes, C.A., 2004, Water quality in the Yakima River Basin Washington, 1999-2000: U.S. Geological Survey Circular 1237, 44 p. [Link]

Johnson, Henry M. and Olson, Jacqueline C., 2002, Synoptic-sampling sites in the Yakima River Basin, Washington, 1999-2000, in Morace, J.L. and McKenzie, S., 2002, Fecal-indicator bacteria in the Yakima River Basin, Washington: An examination of 1999 and 2000 synoptic-sampling data and their relation to historical data: U.S. Geological Survey Water Resources Investigations Report 02-4054, 32 p, 1 pl. in pocket. [Link]

Johnson, Henry M., 1999, The Virginia Beach shallow ground-water study: U.S. Geological Survey Fact Sheet 173-99, 2 p. [Link]

Johnson, Henry M. and Belval, Donna L., 1998, Nutrient and suspended solids loads, yields, and trends in the non-tidal part of five major river basins in Virginia, 1985-96: U.S. Geological Survey Water-Resources Investigations Report 98-4025, 36 p.


My Science Topics

Science Topic
Environmental Issuesground-water quality
Environmental Issuesnonpoint-source pollution
Environmental Issuespesticides and herbicides
Environmental Issuessurface water quality
Environmental Issueswater quality
Techniques and Methodsmathematical modeling
Techniques and Methodsmathematical simulation
Techniques and Methodsstatistical analysis
Techniques and Methodsgeographic information systems (GIS)

My USGS Science Strategy Areas

Understanding Ecosystems & Predicting Ecosystems Change

The Role of Environment and Wildlife in Human Health

Contaminant Fate and Transport

Surficial and subsurface transport and transformation of pesticides and nutrients

Applications of isotopes and anthropogenic contaminants as hydrologic tracers

Hydrology of irrigated agricultural systems



Contact Information

Hank Johnson
2130 S.W. Fifth Avenue
Portland, OR 97201
503-251-3470 - Fax
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