Hank Johnson
I am a research hydrologist at the USGS Oregon Water Science Center. I have been working on groundwater and water-quality issues regionally and nationally for more than 20 years. My research interests include arid-system hydrology, groundwater and spring systems, and environmental tracers.
Education and Certifications
B.S., Geological Sciences, Virginia Polytechnic Institute & State University, Blacksburg, Virginia, 1992
M.S., Environmental Science and Engineering, Oregon Graduate Institute of Science & Technology, Hillsboro, Oregon, 1996
Science and Products
Filter Total Items: 27
Occurrence and distribution of pesticides in surface waters of the Hood River basin, Oregon, 1999-2009
The U.S. Geological Survey analyzed pesticide and trace-element concentration data from the Hood River basin collected by the Oregon Department of Environmental Quality (ODEQ) from 1999 through 2009 to determine the distribution and concentrations of pesticides in the basin's surface waters. Instream concentrations were compared to (1) national and State water-quality standards established to prot
Authors
Whitney B. Temple, Henry M. Johnson
Natural phosphorus sources for the Pacific Northwest
Phosphorus is a naturally occurring element found in all rocks; the amount varies by the type of rock. The amount of phosphorus in sediments is expected to be correlated with the amount of phosphorus in the parent rocks. Streambed sediment collected by the National Uranium Resource Evaluation (NURE) Program were used to estimate the variation of phosphorus across the Pacific Northwest. This file p
Authors
Henry M. Johnson
Subsurface transport of orthophosphate in five agricultural watersheds, USA
Concentrations of dissolved orthophosphate (ortho P) in the unsaturated zone, groundwater, tile drains, and groundwater/stream water interfaces were assessed in five agricultural watersheds to determine the potential for subsurface transport. Concentrations of iron oxides were measured in the aquifer material and adsorption of ortho P on oxide surfaces was assessed by geochemical modeling. Attenua
Authors
Joseph L. Domagalski, Henry M. Johnson
Trends in pesticide concentrations in streams of the western United States, 1993-2005
Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s‐ethyl diproplythiocarbamate (EPTC), metolachlor, simazine, and trifluralin. A parametric regression model was used to account for flow, seasonality, and antecedent hydrologic conditions and there
Authors
Henry M. Johnson, Joseph L. Domagalski, Dina Saleh
Surface-water nutrient conditions and sources in the United States Pacific Northwest
The SPAtially Referenced Regressions On Watershed attributes (SPARROW) model was used to perform an assessment of surface-water nutrient conditions and to identify important nutrient sources in watersheds of the Pacific Northwest region of the United States (U.S.) for the year 2002. Our models included variables representing nutrient sources as well as landscape characteristics that affect nutrien
Authors
D.R. Wise, H.M. Johnson
Effect of agricultural practices on hydrology and water chemistry in a small irrigated catchment, Yakima River Basin, Washington
The role of irrigation and artificial drainage in the hydrologic cycle and the transport of solutes in a small agricultural catchment in central Washington's Yakima Valley were explored using hydrologic, chemical, isotopic, age-dating, and mineralogical data from several environmental compartments, including stream water, ground water, overland flow, and streambed pore water. A conceptual understa
Authors
K. A. McCarthy, Henry M. Johnson
Effects of urbanization on stream ecosystems in the Willamette River basin and surrounding area, Oregon and Washington
This report describes the effects of urbanization on physical, chemical, and biological characteristics of stream ecosystems in 28 watersheds along a gradient of urbanization in the Willamette River basin and surrounding area, Oregon and Washington, from 2003 through 2005. The study that generated the report is one of several urban-effects studies completed nationally by the U.S. Geological Survey
Authors
Ian R. Waite, Steven Sobieszczyk, Kurt D. Carpenter, Andrew J. Arnsberg, Henry M. Johnson, Curt A. Hughes, Michael J. Sarantou, Frank A. Rinella
Occurrence and fate of pesticides in four contrasting agricultural settings in the United States
Occurrence and fate of 45 pesticides and 40 pesticide degradates were investigated in four contrasting agricultural settings—in Maryland, Nebraska, California, and Washington. Primary crops included corn at all sites, soybeans in Maryland, orchards in California and Washington, and vineyards in Washington. Pesticides and pesticide degradates detected in water samples from all four areas were predo
Authors
G. V. Steele, H.M. Johnson, Mark W. Sandstrom, P. D. Capel, J.E. Barbash
Transport and fate of nitrate at the ground-water/surface-water interface
Although numerous studies of hyporheic exchange and denitrification have been conducted in pristine, high-gradient streams, few studies of this type have been conducted in nutrient-rich, low-gradient streams. This is a particularly important subject given the interest in nitrogen (N) inputs to the Gulf of Mexico and other eutrophic aquatic systems. A combination of hydrologic, mineralogical, chemi
Authors
L.J. Puckett, C. Zamora, H. Essaid, J.T. Wilson, H.M. Johnson, M.J. Brayton, J. R. Vogel
Limited occurrence of denitrification in four shallow aquifers in agricultural areas of the United States
The ability of natural attenuation to mitigate agricultural nitrate contamination in recharging aquifers was investigated in four important agricultural settings in the United States. The study used laboratory analyses, field measurements, and flow and transport modeling for monitoring well transects (0.5 to 2.5 km in length) in the San Joaquin watershed, California, the Elkhorn watershed, Nebrask
Authors
C.T. Green, L.J. Puckett, J.K. Böhlke, B.A. Bekins, S.P. Phillips, L. J. Kauffman, J. M. Denver, H.M. Johnson
Factors Affecting the Occurrence and Distribution of Pesticides in the Yakima River Basin, Washington, 2000
The Yakima River Basin is a major center of agricultural production. With a cultivated area of about 450,000 ha (hectares), the region is an important producer of tree fruit, grapes, hops, and dairy products as well as a variety of smaller production crops. To control pest insects, weeds, and fungal infections, about 146 pesticide active ingredients were applied in various formulations during the
Authors
Henry M. Johnson
Environmental Setting of the Granger Drain and DR2 Basins, Washington, 2003-04
The Granger Drain and DR2 basins are located in the Yakima River basin in south central Washington. These agricultural basins are one of five areas in the United States selected for study as part of the National Water-Quality Assessment Program Agricultural Chemicals: Source, Transport, and Fate Study. The Program is designed to describe water-quality conditions and trends based on representative
Authors
Karen L. Payne, Henry M. Johnson, Robert W. Black
Science and Products
- Publications
Filter Total Items: 27
Occurrence and distribution of pesticides in surface waters of the Hood River basin, Oregon, 1999-2009
The U.S. Geological Survey analyzed pesticide and trace-element concentration data from the Hood River basin collected by the Oregon Department of Environmental Quality (ODEQ) from 1999 through 2009 to determine the distribution and concentrations of pesticides in the basin's surface waters. Instream concentrations were compared to (1) national and State water-quality standards established to protAuthorsWhitney B. Temple, Henry M. JohnsonNatural phosphorus sources for the Pacific Northwest
Phosphorus is a naturally occurring element found in all rocks; the amount varies by the type of rock. The amount of phosphorus in sediments is expected to be correlated with the amount of phosphorus in the parent rocks. Streambed sediment collected by the National Uranium Resource Evaluation (NURE) Program were used to estimate the variation of phosphorus across the Pacific Northwest. This file pAuthorsHenry M. JohnsonSubsurface transport of orthophosphate in five agricultural watersheds, USA
Concentrations of dissolved orthophosphate (ortho P) in the unsaturated zone, groundwater, tile drains, and groundwater/stream water interfaces were assessed in five agricultural watersheds to determine the potential for subsurface transport. Concentrations of iron oxides were measured in the aquifer material and adsorption of ortho P on oxide surfaces was assessed by geochemical modeling. AttenuaAuthorsJoseph L. Domagalski, Henry M. JohnsonTrends in pesticide concentrations in streams of the western United States, 1993-2005
Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s‐ethyl diproplythiocarbamate (EPTC), metolachlor, simazine, and trifluralin. A parametric regression model was used to account for flow, seasonality, and antecedent hydrologic conditions and thereAuthorsHenry M. Johnson, Joseph L. Domagalski, Dina SalehSurface-water nutrient conditions and sources in the United States Pacific Northwest
The SPAtially Referenced Regressions On Watershed attributes (SPARROW) model was used to perform an assessment of surface-water nutrient conditions and to identify important nutrient sources in watersheds of the Pacific Northwest region of the United States (U.S.) for the year 2002. Our models included variables representing nutrient sources as well as landscape characteristics that affect nutrienAuthorsD.R. Wise, H.M. JohnsonEffect of agricultural practices on hydrology and water chemistry in a small irrigated catchment, Yakima River Basin, Washington
The role of irrigation and artificial drainage in the hydrologic cycle and the transport of solutes in a small agricultural catchment in central Washington's Yakima Valley were explored using hydrologic, chemical, isotopic, age-dating, and mineralogical data from several environmental compartments, including stream water, ground water, overland flow, and streambed pore water. A conceptual understaAuthorsK. A. McCarthy, Henry M. JohnsonEffects of urbanization on stream ecosystems in the Willamette River basin and surrounding area, Oregon and Washington
This report describes the effects of urbanization on physical, chemical, and biological characteristics of stream ecosystems in 28 watersheds along a gradient of urbanization in the Willamette River basin and surrounding area, Oregon and Washington, from 2003 through 2005. The study that generated the report is one of several urban-effects studies completed nationally by the U.S. Geological SurveyAuthorsIan R. Waite, Steven Sobieszczyk, Kurt D. Carpenter, Andrew J. Arnsberg, Henry M. Johnson, Curt A. Hughes, Michael J. Sarantou, Frank A. RinellaOccurrence and fate of pesticides in four contrasting agricultural settings in the United States
Occurrence and fate of 45 pesticides and 40 pesticide degradates were investigated in four contrasting agricultural settings—in Maryland, Nebraska, California, and Washington. Primary crops included corn at all sites, soybeans in Maryland, orchards in California and Washington, and vineyards in Washington. Pesticides and pesticide degradates detected in water samples from all four areas were predoAuthorsG. V. Steele, H.M. Johnson, Mark W. Sandstrom, P. D. Capel, J.E. BarbashTransport and fate of nitrate at the ground-water/surface-water interface
Although numerous studies of hyporheic exchange and denitrification have been conducted in pristine, high-gradient streams, few studies of this type have been conducted in nutrient-rich, low-gradient streams. This is a particularly important subject given the interest in nitrogen (N) inputs to the Gulf of Mexico and other eutrophic aquatic systems. A combination of hydrologic, mineralogical, chemiAuthorsL.J. Puckett, C. Zamora, H. Essaid, J.T. Wilson, H.M. Johnson, M.J. Brayton, J. R. VogelLimited occurrence of denitrification in four shallow aquifers in agricultural areas of the United States
The ability of natural attenuation to mitigate agricultural nitrate contamination in recharging aquifers was investigated in four important agricultural settings in the United States. The study used laboratory analyses, field measurements, and flow and transport modeling for monitoring well transects (0.5 to 2.5 km in length) in the San Joaquin watershed, California, the Elkhorn watershed, NebraskAuthorsC.T. Green, L.J. Puckett, J.K. Böhlke, B.A. Bekins, S.P. Phillips, L. J. Kauffman, J. M. Denver, H.M. JohnsonFactors Affecting the Occurrence and Distribution of Pesticides in the Yakima River Basin, Washington, 2000
The Yakima River Basin is a major center of agricultural production. With a cultivated area of about 450,000 ha (hectares), the region is an important producer of tree fruit, grapes, hops, and dairy products as well as a variety of smaller production crops. To control pest insects, weeds, and fungal infections, about 146 pesticide active ingredients were applied in various formulations during theAuthorsHenry M. JohnsonEnvironmental Setting of the Granger Drain and DR2 Basins, Washington, 2003-04
The Granger Drain and DR2 basins are located in the Yakima River basin in south central Washington. These agricultural basins are one of five areas in the United States selected for study as part of the National Water-Quality Assessment Program Agricultural Chemicals: Source, Transport, and Fate Study. The Program is designed to describe water-quality conditions and trends based on representativeAuthorsKaren L. Payne, Henry M. Johnson, Robert W. Black - Science
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