John F Walker (Former Employee)
Science and Products
Filter Total Items: 42
Evaluation of nonpoint-source contamination, Wisconsin: water year 1999 Evaluation of nonpoint-source contamination, Wisconsin: water year 1999
The objective of the watershed-management evaluation monitoring program in Wisconsin is to evaluate the effectiveness of best-management practices (BMPs) for controlling nonpoint-source pollution in rural and urban watersheds. This progress report provides a summary of the data collected by the U.S Geological Survey for the program and a discussion of the results from several different...
Authors
John F. Walker, D.J. Graczyk, Steven R. Corsi, J.A. Wierl, D.W. Owens
Trout Lake, Wisconsin: A water, energy, and biogeochemical budgets program site Trout Lake, Wisconsin: A water, energy, and biogeochemical budgets program site
The Trout Lake Watershed is in the Northern Highlands Lake District in north-central Wisconsin. The study area includes four subbasins with five lakes and two bog lakes. The objectives of the Trout Lake WEBB project are to (1) describe processes controlling water and solute fluxes in the Trout Lake watershed, (2) examine interactions among those processes and (3) improve the capability...
Authors
John F. Walker, Thomas D. Bullen
Characterizing hydrology and the importance of ground-water discharge in natural and constructed wetlands Characterizing hydrology and the importance of ground-water discharge in natural and constructed wetlands
Although considered the most important component for the establishment and persistence of wetlands, hydrology has been hard to characterize and linkages between hydrology and other environmental conditions are often poorly understood. In this work, methods for characterizing a wetland’s hydrology from hydrographs were developed, and the importance of ground water to the physical and...
Authors
Randall J. Hunt, John F. Walker, David P. Krabbenhoft
Optimization of ground-water withdrawal in the lower Fox River communities, Wisconsin Optimization of ground-water withdrawal in the lower Fox River communities, Wisconsin
Pumping from closely spaced wells in the Central Brown County area and the Fox Cities area near the north shore of Lake Winnebago has resulted in the formation of deep cones of depression in the vicinity of the two pumping centers. Water-level measurements indicate there has been a steady decline in water levels in the vicinity of these two pumping centers for the past 50 years. This...
Authors
J.F. Walker, D. A. Saad, J. T. Krohelski
Measurement of flow under ice covers in North America Measurement of flow under ice covers in North America
A substantial proportion of natural streams in the United States and Canada are affected by ice cover during the winter. To substantiate the currently used procedures for measuring streamflow during the winter, the U.S. Geological Survey (USGS) and Water Survey of Canada (WSC) began independent, coordinated programs for research and development related to the measurement of streamflow...
Authors
J.F. Walker, D. Wang
Evaluation of nonpoint-source contamination, Wisconsin: Land-use and Best-Management-Practices inventory, selected streamwater-quality data, urban-watershed quality assurance and quality control, constituent loads in rural streams, and snowmelt-runoff ana Evaluation of nonpoint-source contamination, Wisconsin: Land-use and Best-Management-Practices inventory, selected streamwater-quality data, urban-watershed quality assurance and quality control, constituent loads in rural streams, and snowmelt-runoff ana
The objective of the watershed-management evaluation monitoring program in Wisconsin is to evaluate the effectiveness of best-management practices (BMP) for controlling nonpoint-source contamination in rural and urban watersheds. This report is an annual summary of the data collected for the program by the U.S Geological Survey and a report of the results of several different detailed...
Authors
J.F. Walker, D.J. Graczyk, S.R. Corsi, D.W. Owens, J.A. Wierl
Science and Products
Filter Total Items: 42
Evaluation of nonpoint-source contamination, Wisconsin: water year 1999 Evaluation of nonpoint-source contamination, Wisconsin: water year 1999
The objective of the watershed-management evaluation monitoring program in Wisconsin is to evaluate the effectiveness of best-management practices (BMPs) for controlling nonpoint-source pollution in rural and urban watersheds. This progress report provides a summary of the data collected by the U.S Geological Survey for the program and a discussion of the results from several different...
Authors
John F. Walker, D.J. Graczyk, Steven R. Corsi, J.A. Wierl, D.W. Owens
Trout Lake, Wisconsin: A water, energy, and biogeochemical budgets program site Trout Lake, Wisconsin: A water, energy, and biogeochemical budgets program site
The Trout Lake Watershed is in the Northern Highlands Lake District in north-central Wisconsin. The study area includes four subbasins with five lakes and two bog lakes. The objectives of the Trout Lake WEBB project are to (1) describe processes controlling water and solute fluxes in the Trout Lake watershed, (2) examine interactions among those processes and (3) improve the capability...
Authors
John F. Walker, Thomas D. Bullen
Characterizing hydrology and the importance of ground-water discharge in natural and constructed wetlands Characterizing hydrology and the importance of ground-water discharge in natural and constructed wetlands
Although considered the most important component for the establishment and persistence of wetlands, hydrology has been hard to characterize and linkages between hydrology and other environmental conditions are often poorly understood. In this work, methods for characterizing a wetland’s hydrology from hydrographs were developed, and the importance of ground water to the physical and...
Authors
Randall J. Hunt, John F. Walker, David P. Krabbenhoft
Optimization of ground-water withdrawal in the lower Fox River communities, Wisconsin Optimization of ground-water withdrawal in the lower Fox River communities, Wisconsin
Pumping from closely spaced wells in the Central Brown County area and the Fox Cities area near the north shore of Lake Winnebago has resulted in the formation of deep cones of depression in the vicinity of the two pumping centers. Water-level measurements indicate there has been a steady decline in water levels in the vicinity of these two pumping centers for the past 50 years. This...
Authors
J.F. Walker, D. A. Saad, J. T. Krohelski
Measurement of flow under ice covers in North America Measurement of flow under ice covers in North America
A substantial proportion of natural streams in the United States and Canada are affected by ice cover during the winter. To substantiate the currently used procedures for measuring streamflow during the winter, the U.S. Geological Survey (USGS) and Water Survey of Canada (WSC) began independent, coordinated programs for research and development related to the measurement of streamflow...
Authors
J.F. Walker, D. Wang
Evaluation of nonpoint-source contamination, Wisconsin: Land-use and Best-Management-Practices inventory, selected streamwater-quality data, urban-watershed quality assurance and quality control, constituent loads in rural streams, and snowmelt-runoff ana Evaluation of nonpoint-source contamination, Wisconsin: Land-use and Best-Management-Practices inventory, selected streamwater-quality data, urban-watershed quality assurance and quality control, constituent loads in rural streams, and snowmelt-runoff ana
The objective of the watershed-management evaluation monitoring program in Wisconsin is to evaluate the effectiveness of best-management practices (BMP) for controlling nonpoint-source contamination in rural and urban watersheds. This report is an annual summary of the data collected for the program by the U.S Geological Survey and a report of the results of several different detailed...
Authors
J.F. Walker, D.J. Graczyk, S.R. Corsi, D.W. Owens, J.A. Wierl