Karen Burow (Former Employee)
Science and Products
Filter Total Items: 39
Factors affecting temporal variability of arsenic in groundwater used for drinking water supply in the United States Factors affecting temporal variability of arsenic in groundwater used for drinking water supply in the United States
The occurrence of arsenic in groundwater is a recognized environmental hazard with worldwide importance and much effort has been focused on surveying and predicting where arsenic occurs. Temporal variability is one aspect of this environmental hazard that has until recently received less attention than other aspects. For this study, we analyzed 1245 wells with two samples per well. We...
Authors
Joseph D. Ayotte, Marcel Belaval, Scott A. Olson, Karen R. Burow, Sarah M. Flanagan, Stephen R. Hinkle, Bruce D. Lindsey
Groundwater studies: principal aquifer surveys Groundwater studies: principal aquifer surveys
In 1991, the U.S. Congress established the National Water-Quality Assessment (NAWQA) program within the U.S. Geological Survey (USGS) to develop nationally consistent long-term datasets and provide information about the quality of the Nation’s streams and groundwater. The USGS uses objective and reliable data, water-quality models, and systematic scientific studies to assess current...
Authors
Karen R. Burow, Kenneth Belitz
Assessment of regional change in nitrate concentrations in groundwater in the Central Valley, California, USA, 1950s-2000s Assessment of regional change in nitrate concentrations in groundwater in the Central Valley, California, USA, 1950s-2000s
A regional assessment of multi-decadal changes in nitrate concentrations was done using historical data and a spatially stratified non-biased approach. Data were stratified into physiographic subregions on the basis of geomorphology and soils data to represent zones of historical recharge and discharge patterns in the basin. Data were also stratified by depth to represent a shallow zone...
Authors
Karen R. Burow, Bryant C. Jurgens, Kenneth Belitz, Neil M. Dubrovsky
The quality of our nation's waters: Nutrients in the nation's streams and groundwater, 1992-2004 The quality of our nation's waters: Nutrients in the nation's streams and groundwater, 1992-2004
National Findings and Their Implications Although the use of artificial fertilizer has supported increasing food production to meet the needs of a growing population, increases in nutrient loadings from agricultural and, to a lesser extent, urban sources have resulted in nutrient concentrations in many streams and parts of aquifers that exceed standards for protection of human health and...
Authors
Neil M. Dubrovsky, Karen R. Burow, Gregory M. Clark, JoAnn M. Gronberg, Pixie A. Hamilton, Kerie J. Hitt, David K. Mueller, Mark D. Munn, Bernard T. Nolan, Larry J. Puckett, Michael G. Rupert, Terry M. Short, Norman E. Spahr, Lori A. Sprague, William G. Wilber
Depth-dependent sampling to identify short-circuit pathways to public-supply wells in multiple aquifer settings in the United States Depth-dependent sampling to identify short-circuit pathways to public-supply wells in multiple aquifer settings in the United States
Depth-dependent water-quality and borehole flow data were used to determine where and how contamination enters public-supply wells (PSWs) at study sites in different principal aquifers of the United States. At each of three study sites, depth-dependent samples and wellbore flow data were collected from multiple depths in selected PSWs under pumping conditions. The chemistry of these...
Authors
Matthew K. Landon, Bryant C. Jurgens, Brian G. Katz, Sandra M. Eberts, Karen R. Burow, Christy A. Crandall
Nitrate in groundwater of the United States, 1991-2003 Nitrate in groundwater of the United States, 1991-2003
An assessment of nitrate concentrations in groundwater in the United States indicates that concentrations are highest in shallow, oxic groundwater beneath areas with high N inputs. During 1991-2003, 5101 wells were sampled in 51 study areas throughout the U.S. as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) program. The well networks reflect the existing...
Authors
Karen R. Burow, Bernard T. Nolan, Michael G. Rupert, Neil M. Dubrovsky
Science and Products
Filter Total Items: 39
Factors affecting temporal variability of arsenic in groundwater used for drinking water supply in the United States Factors affecting temporal variability of arsenic in groundwater used for drinking water supply in the United States
The occurrence of arsenic in groundwater is a recognized environmental hazard with worldwide importance and much effort has been focused on surveying and predicting where arsenic occurs. Temporal variability is one aspect of this environmental hazard that has until recently received less attention than other aspects. For this study, we analyzed 1245 wells with two samples per well. We...
Authors
Joseph D. Ayotte, Marcel Belaval, Scott A. Olson, Karen R. Burow, Sarah M. Flanagan, Stephen R. Hinkle, Bruce D. Lindsey
Groundwater studies: principal aquifer surveys Groundwater studies: principal aquifer surveys
In 1991, the U.S. Congress established the National Water-Quality Assessment (NAWQA) program within the U.S. Geological Survey (USGS) to develop nationally consistent long-term datasets and provide information about the quality of the Nation’s streams and groundwater. The USGS uses objective and reliable data, water-quality models, and systematic scientific studies to assess current...
Authors
Karen R. Burow, Kenneth Belitz
Assessment of regional change in nitrate concentrations in groundwater in the Central Valley, California, USA, 1950s-2000s Assessment of regional change in nitrate concentrations in groundwater in the Central Valley, California, USA, 1950s-2000s
A regional assessment of multi-decadal changes in nitrate concentrations was done using historical data and a spatially stratified non-biased approach. Data were stratified into physiographic subregions on the basis of geomorphology and soils data to represent zones of historical recharge and discharge patterns in the basin. Data were also stratified by depth to represent a shallow zone...
Authors
Karen R. Burow, Bryant C. Jurgens, Kenneth Belitz, Neil M. Dubrovsky
The quality of our nation's waters: Nutrients in the nation's streams and groundwater, 1992-2004 The quality of our nation's waters: Nutrients in the nation's streams and groundwater, 1992-2004
National Findings and Their Implications Although the use of artificial fertilizer has supported increasing food production to meet the needs of a growing population, increases in nutrient loadings from agricultural and, to a lesser extent, urban sources have resulted in nutrient concentrations in many streams and parts of aquifers that exceed standards for protection of human health and...
Authors
Neil M. Dubrovsky, Karen R. Burow, Gregory M. Clark, JoAnn M. Gronberg, Pixie A. Hamilton, Kerie J. Hitt, David K. Mueller, Mark D. Munn, Bernard T. Nolan, Larry J. Puckett, Michael G. Rupert, Terry M. Short, Norman E. Spahr, Lori A. Sprague, William G. Wilber
Depth-dependent sampling to identify short-circuit pathways to public-supply wells in multiple aquifer settings in the United States Depth-dependent sampling to identify short-circuit pathways to public-supply wells in multiple aquifer settings in the United States
Depth-dependent water-quality and borehole flow data were used to determine where and how contamination enters public-supply wells (PSWs) at study sites in different principal aquifers of the United States. At each of three study sites, depth-dependent samples and wellbore flow data were collected from multiple depths in selected PSWs under pumping conditions. The chemistry of these...
Authors
Matthew K. Landon, Bryant C. Jurgens, Brian G. Katz, Sandra M. Eberts, Karen R. Burow, Christy A. Crandall
Nitrate in groundwater of the United States, 1991-2003 Nitrate in groundwater of the United States, 1991-2003
An assessment of nitrate concentrations in groundwater in the United States indicates that concentrations are highest in shallow, oxic groundwater beneath areas with high N inputs. During 1991-2003, 5101 wells were sampled in 51 study areas throughout the U.S. as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) program. The well networks reflect the existing...
Authors
Karen R. Burow, Bernard T. Nolan, Michael G. Rupert, Neil M. Dubrovsky