Welcome to the Willamette River Study page. Here you will find links to USGS research for the Willamette River and the Willamette River Basin.
Below are other science projects associated with this project.
Videos
Below are publications associated with this project.
Estimated Depth to Ground Water and Configuration of the Water Table in the Portland, Oregon Area
Reliable information on the configuration of the water table in the Portland metropolitan area is needed to address concerns about various water-resource issues, especially with regard to potential effects from stormwater injection systems such as UIC (underground injection control) systems that are either existing or planned. To help address these concerns, this report presents the estimated dept
Authors
Daniel T. Snyder
Filter Total Items: 23
Analysis of nutrient and ancillary water-quality data for surface and ground water of the Willamette Basin, Oregon, 1980-90
An analysis of historical water-quality data for surface and ground water collected in the Willamette and Sandy River Basins during the 1980-90 water years was performed. For surface water, most data were concentrated at sites on the main stem Willamette River or near the mouths of major tributaries. All seasons were represented. Data for nitrogen and phosphorus species were readily available, but
Authors
B. A. Bonn, S.R. Hinkle, D.A. Wentz, M.A. Uhrich
Estimation of ground-water recharge from precipitation, runoff into drywells, and on-site waste-disposal systems in the Portland Basin, Oregon and Washington
The average recharge rate in the Portland Basin, in northwestern Oregon and southwestern Washington, is estimated to be about 22.0 inches per year. Of that amount, precipitation accounts for about 20.8 inches per year, runoff into drywells 0.9 inches per year, and on-site waste disposal about 0.4 inches per year. Recharge is highest, about 49 inches per year, in the Cascade Range. Recharge is lowe
Authors
D.T. Snyder, D. S. Morgan, T.S. McGrath
A description of hydrogeologic units in the Portland Basin, Oregon and Washington
No abstract available.
Authors
R.D. Swanson, W. D. McFarland, J. B. Gonthier, J.M. Wilkinson
Estimated average annual ground-water pumpage in the Portland Basin, Oregon and Washington 1987-88
Data for ground-water pumpage were collected during an inventory of wells in 1987-88 in the Portland Basin located in northwestern Oregon and southwestern Washington. Estimates of annual ground-water pumpage were made for the three major categories of use: public supply, industry, and irrigation. A large rapidly expanding metropolitan area is situated within the Portland Basin, along with several
Authors
C. A. Collins, T.M. Broad
Modifications of the U.S. Geological Survey modular, finite-difference, ground-water flow model to read and write geographic information system files
This report documents modifications to the U.S. Geological Survey modular, three-dimensional, finite-difference, ground-water flow model, commonly called MODFLOW, so that it can read and write files used by a geographic information system (GIS). The modified model program is called MODFLOWARC.
Simulation programs such as MODFLOW generally require large amounts of input data and produce large amo
Authors
Leonard L. Orzol, Timothy S. McGrath
The dynamic relationship between ground water and the Columbia River: using deuterium and oxygen-18 as tracers
Deuterium and oxygen-18 were used as natural tracers to investigate the hydraulic relationship between the Columbia River and the Blue Lake gravel aquifer near Portland, Oregon. A time series of stable-isotope data collected from surface and ground waters during a March 1990 aquifer test confirms that the river and aquifer are hydraulically connected. Calculations based on simple mixing show that
Authors
K. A. McCarthy, W. D. McFarland, J.M. Wilkinson, L. D. White
Ground-water data for the Portland Basin, Oregon and Washington
No abstract available.
Authors
K. A. McCarthy, D.B. Anderson
Analysis of bottom material from the Willamette River, Portland Harbor, Oregon
The bottom material of the Willamette River, Portland Harbor, was sampled in duplicate on February 1, 1977. Results are reported on the following analyses of the material: immediate and long-term oxygen demand; particle size; percent moisture; residue, loss on ignition; and chemical.
Authors
Stuart W. McKenzie
Algal conditions and the potential for future algal problems in the Willamette River, Oregon
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950 's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use of other waste-management practices. As a
Authors
David A. Rickert, R.R. Petersen, S. W. McKenzie, W. G. Hines, S.A. Wille
A synoptic survey of trace metals in bottom sediments of the Willamette River, Oregon
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950 's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use of other waste-management practices. As a
Authors
David A. Rickert, V. C. Kennedy, S. W. McKenzie, W. G. Hines
An account of the geology of Oregon City, Oregon, with notes on adajacent West Linn and Willamette, Oregon
No abstract available.
Authors
Donald Eldon Trimble
Welcome to the Willamette River Study page. Here you will find links to USGS research for the Willamette River and the Willamette River Basin.
Below are other science projects associated with this project.
Videos
Below are publications associated with this project.
Estimated Depth to Ground Water and Configuration of the Water Table in the Portland, Oregon Area
Reliable information on the configuration of the water table in the Portland metropolitan area is needed to address concerns about various water-resource issues, especially with regard to potential effects from stormwater injection systems such as UIC (underground injection control) systems that are either existing or planned. To help address these concerns, this report presents the estimated dept
Authors
Daniel T. Snyder
Filter Total Items: 23
Analysis of nutrient and ancillary water-quality data for surface and ground water of the Willamette Basin, Oregon, 1980-90
An analysis of historical water-quality data for surface and ground water collected in the Willamette and Sandy River Basins during the 1980-90 water years was performed. For surface water, most data were concentrated at sites on the main stem Willamette River or near the mouths of major tributaries. All seasons were represented. Data for nitrogen and phosphorus species were readily available, but
Authors
B. A. Bonn, S.R. Hinkle, D.A. Wentz, M.A. Uhrich
Estimation of ground-water recharge from precipitation, runoff into drywells, and on-site waste-disposal systems in the Portland Basin, Oregon and Washington
The average recharge rate in the Portland Basin, in northwestern Oregon and southwestern Washington, is estimated to be about 22.0 inches per year. Of that amount, precipitation accounts for about 20.8 inches per year, runoff into drywells 0.9 inches per year, and on-site waste disposal about 0.4 inches per year. Recharge is highest, about 49 inches per year, in the Cascade Range. Recharge is lowe
Authors
D.T. Snyder, D. S. Morgan, T.S. McGrath
A description of hydrogeologic units in the Portland Basin, Oregon and Washington
No abstract available.
Authors
R.D. Swanson, W. D. McFarland, J. B. Gonthier, J.M. Wilkinson
Estimated average annual ground-water pumpage in the Portland Basin, Oregon and Washington 1987-88
Data for ground-water pumpage were collected during an inventory of wells in 1987-88 in the Portland Basin located in northwestern Oregon and southwestern Washington. Estimates of annual ground-water pumpage were made for the three major categories of use: public supply, industry, and irrigation. A large rapidly expanding metropolitan area is situated within the Portland Basin, along with several
Authors
C. A. Collins, T.M. Broad
Modifications of the U.S. Geological Survey modular, finite-difference, ground-water flow model to read and write geographic information system files
This report documents modifications to the U.S. Geological Survey modular, three-dimensional, finite-difference, ground-water flow model, commonly called MODFLOW, so that it can read and write files used by a geographic information system (GIS). The modified model program is called MODFLOWARC.
Simulation programs such as MODFLOW generally require large amounts of input data and produce large amo
Authors
Leonard L. Orzol, Timothy S. McGrath
The dynamic relationship between ground water and the Columbia River: using deuterium and oxygen-18 as tracers
Deuterium and oxygen-18 were used as natural tracers to investigate the hydraulic relationship between the Columbia River and the Blue Lake gravel aquifer near Portland, Oregon. A time series of stable-isotope data collected from surface and ground waters during a March 1990 aquifer test confirms that the river and aquifer are hydraulically connected. Calculations based on simple mixing show that
Authors
K. A. McCarthy, W. D. McFarland, J.M. Wilkinson, L. D. White
Ground-water data for the Portland Basin, Oregon and Washington
No abstract available.
Authors
K. A. McCarthy, D.B. Anderson
Analysis of bottom material from the Willamette River, Portland Harbor, Oregon
The bottom material of the Willamette River, Portland Harbor, was sampled in duplicate on February 1, 1977. Results are reported on the following analyses of the material: immediate and long-term oxygen demand; particle size; percent moisture; residue, loss on ignition; and chemical.
Authors
Stuart W. McKenzie
Algal conditions and the potential for future algal problems in the Willamette River, Oregon
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950 's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use of other waste-management practices. As a
Authors
David A. Rickert, R.R. Petersen, S. W. McKenzie, W. G. Hines, S.A. Wille
A synoptic survey of trace metals in bottom sediments of the Willamette River, Oregon
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950 's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use of other waste-management practices. As a
Authors
David A. Rickert, V. C. Kennedy, S. W. McKenzie, W. G. Hines
An account of the geology of Oregon City, Oregon, with notes on adajacent West Linn and Willamette, Oregon
No abstract available.
Authors
Donald Eldon Trimble