Karen Burow (Former Employee)
Science and Products
Filter Total Items: 38
Heat as a tracer to estimate dissolved organic carbon flux from a restored wetland
Heat was used as a natural tracer to characterize shallow ground water flow beneath a complex wetland system. Hydrogeologic data were combined with measured vertical temperature profiles to constrain a series of two‐dimensional, transient simulations of ground water flow and heat transport using the model code SUTRA (Voss 1990). The measured seasonal temperature signal reached depths of 2.7 m bene
Authors
K.R. Burow, J. Constantz, R. Fujii
Hydrogeologic characterization of the Modesto Area, San Joaquin Valley, California
Hydrogeologic characterization was done to develop an understanding of the hydrogeologic setting near Modesto by maximizing the use of existing data and building on previous work in the region. A substantial amount of new lithologic and hydrologic data are available that allow a more complete and updated characterization of the aquifer system. In this report, geologic units are described, a databa
Authors
Karen R. Burow, Jennifer L. Shelton, Joseph A. Hevesi, Gary S. Weissmann
Water-Quality Assessment of the San Joaquin-Tulare Basins: Entering a new decade
In 1991, the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey began to address the need for consistent and scientifically sound information for managing the Nation's water resources. The long-term goals of this program are to assess the status of the quality of freshwater streams and aquifers, to describe trends or changes in water quality over time, and to provide a
Authors
Jo Ann M. Gronberg, Charles R. Kratzer, Karen R. Burow, Joseph L. Domagalski, Steven P. Phillips
Framework for a ground-water quality monitoring and assessment program for California
The State of California uses more ground water than any other State in the Nation. With a population of over 30 million people, an agricultural economy based on intensive irrigation, large urban industrial areas, and naturally elevated concentrations of some trace elements, there is a wide range of contaminant sources that have the potential to contaminate ground water and limit its beneficial use
Authors
Kenneth Belitz, Neil M. Dubrovsky, Karen Burow, Bryant C. Jurgens, Tyler John
Hydrogeologic data from a shallow flooding demonstration project, Twitchell Island, California, 1997-2001
Data were collected during a study to determine the effects of continuous shallow flooding on ground-water discharge to an agricultural drainage ditch on Twitchell Island, California. The conceptual model of the hydrogeologic setting was detailed with soil coring and borehole-geophysical logs. Twenty-two monitoring wells were installed to observe hydraulic head. Ten aquifer slug tests were done in
Authors
James M. Gamble, Karen R. Burow, Gail A. Wheeler, Robert Hilditch, Judy Z. Drexler
Low-Level Volatile Organic Compounds in Active Public Supply Wells as Ground-Water Tracers in the Los Angeles Physiographic Basin, California, 2000
Data were collected to evaluate the use of low-level volatile organic compounds (VOC) to assess the vulnerability of public supply wells in the Los Angeles physiographic basin. Samples of untreated ground water from 178 active public supply wells in the Los Angeles physiographic basin show that VOCs were detected in 61 percent of the ground-water samples; most of these detections were low, with on
Authors
Jennifer L. Shelton, Karen R. Burow, Kenneth Belitz, Neil M. Dubrovsky, Michael Land, JoAnn Gronberg
Chlorofluorocarbon dating of herbicide-containing well waters in Fresno and Tulare counties, California
Simazine, diuron, and bromacil are the most frequently detected currently registered pesticides in California groundwater. These herbicides have been used for several decades in Fresno and Tulare counties, California; however, previous data are inadequate to determine whether the detections are a result of recent or historical applications (i.e., within the last decade, or 20-30 yr ago). Chloroflu
Authors
F. Spurlock, K. Burow, N. Dubrovsky
Evaluation of processes affecting 1,2-dibromo-3-chloropropane (DBCP) concentrations in ground water in the eastern San Joaquin Valley, California: Analysis of chemical data and ground-water flow and transport simulations
Future use of the sole-source aquifer near Fresno in the eastern San Joaquin Valley, California, will depend, in part, on how long 1,2-dibromo-3-chloropropane (DBCP), an agricultural fumigant banned from use since the late 1970's, persists at concentrations greater than the maximum contaminant level of 0.2 micrograms per liter (mg/L). Field data indicate that DBCP concentrations in ground water ha
Authors
Karen R. Burow, Sandra Y. Panshin, Neil H. Dubrovsky, David Vanbrocklin, Graham E. Fogg
Nitrate and pesticides in ground water in the eastern San Joaquin Valley, California : occurrence and trends
The occurrence of nitrate and pesticides in ground water in California's eastern San Joaquin Valley may be greatly influenced by the long history of intensive farming and irrigation and the generally permeable sediments. This study, which is part of the U.S. Geological Survey National Water-Quality Assessment Program, was done to assess the quality of the ground water and to do a preliminary evalu
Authors
Karen R. Burow, Sylvia V. Stork, N. M. Dubrovsky
Water quality in the San Joaquin-Tulare basins, California, 1992-95
This report is intended to summarize major findings that emerged between 1992 and 1995 from the water-quality assessment of the San Joaquin-Tulare Basins Study Unit and to relate these findings to water-quality issues of regional and national concern. The information is primarily intended for those who are involved in water-resource management. Yet, the information contained here may also interest
Authors
Neil M. Dubrovsky, Charles R. Kratzer, Larry R. Brown, JoAnn M. Gronberg, Karen R. Burow
Environmental setting of the San Joaquin-Tulare basins, California
The National Water-Quality Assessment Program for the San Joaquin-Tulare Basins began in 1991 to study the effects of natural and anthropogenic influences on the quality of ground water, surface water, biology, and ecology. The San Joaquin-Tulare Basins study unit, which covers approximately 31,200 square miles in central California, is made up of the San Joaquin Valley, the eastern slope of the C
Authors
JoAnn A. Gronberg, Neil M. Dubrovsky, Charles R. Kratzer, Joseph L. Domagalski, Larry R. Brown, Karen R. Burow
Occurrence of nitrate and pesticides in ground water beneath three agricultural land-use settings in the eastern San Joaquin Valley, California, 1993-1995
The processes that affect nitrate and pesticide occurrence may be better understood by relating ground-water quality to natural and human factors in the context of distinct, regionally extensive, land- use settings. This study assesses nitrate and pesticide occurrence in ground water beneath three agricultural land-use settings in the eastern San Joaquin Valley, California. Water samples were coll
Authors
Karen R. Burow, Jennifer L. Shelton, Neil M. Dubrovsky
Science and Products
Filter Total Items: 38
Heat as a tracer to estimate dissolved organic carbon flux from a restored wetland
Heat was used as a natural tracer to characterize shallow ground water flow beneath a complex wetland system. Hydrogeologic data were combined with measured vertical temperature profiles to constrain a series of two‐dimensional, transient simulations of ground water flow and heat transport using the model code SUTRA (Voss 1990). The measured seasonal temperature signal reached depths of 2.7 m bene
Authors
K.R. Burow, J. Constantz, R. Fujii
Hydrogeologic characterization of the Modesto Area, San Joaquin Valley, California
Hydrogeologic characterization was done to develop an understanding of the hydrogeologic setting near Modesto by maximizing the use of existing data and building on previous work in the region. A substantial amount of new lithologic and hydrologic data are available that allow a more complete and updated characterization of the aquifer system. In this report, geologic units are described, a databa
Authors
Karen R. Burow, Jennifer L. Shelton, Joseph A. Hevesi, Gary S. Weissmann
Water-Quality Assessment of the San Joaquin-Tulare Basins: Entering a new decade
In 1991, the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey began to address the need for consistent and scientifically sound information for managing the Nation's water resources. The long-term goals of this program are to assess the status of the quality of freshwater streams and aquifers, to describe trends or changes in water quality over time, and to provide a
Authors
Jo Ann M. Gronberg, Charles R. Kratzer, Karen R. Burow, Joseph L. Domagalski, Steven P. Phillips
Framework for a ground-water quality monitoring and assessment program for California
The State of California uses more ground water than any other State in the Nation. With a population of over 30 million people, an agricultural economy based on intensive irrigation, large urban industrial areas, and naturally elevated concentrations of some trace elements, there is a wide range of contaminant sources that have the potential to contaminate ground water and limit its beneficial use
Authors
Kenneth Belitz, Neil M. Dubrovsky, Karen Burow, Bryant C. Jurgens, Tyler John
Hydrogeologic data from a shallow flooding demonstration project, Twitchell Island, California, 1997-2001
Data were collected during a study to determine the effects of continuous shallow flooding on ground-water discharge to an agricultural drainage ditch on Twitchell Island, California. The conceptual model of the hydrogeologic setting was detailed with soil coring and borehole-geophysical logs. Twenty-two monitoring wells were installed to observe hydraulic head. Ten aquifer slug tests were done in
Authors
James M. Gamble, Karen R. Burow, Gail A. Wheeler, Robert Hilditch, Judy Z. Drexler
Low-Level Volatile Organic Compounds in Active Public Supply Wells as Ground-Water Tracers in the Los Angeles Physiographic Basin, California, 2000
Data were collected to evaluate the use of low-level volatile organic compounds (VOC) to assess the vulnerability of public supply wells in the Los Angeles physiographic basin. Samples of untreated ground water from 178 active public supply wells in the Los Angeles physiographic basin show that VOCs were detected in 61 percent of the ground-water samples; most of these detections were low, with on
Authors
Jennifer L. Shelton, Karen R. Burow, Kenneth Belitz, Neil M. Dubrovsky, Michael Land, JoAnn Gronberg
Chlorofluorocarbon dating of herbicide-containing well waters in Fresno and Tulare counties, California
Simazine, diuron, and bromacil are the most frequently detected currently registered pesticides in California groundwater. These herbicides have been used for several decades in Fresno and Tulare counties, California; however, previous data are inadequate to determine whether the detections are a result of recent or historical applications (i.e., within the last decade, or 20-30 yr ago). Chloroflu
Authors
F. Spurlock, K. Burow, N. Dubrovsky
Evaluation of processes affecting 1,2-dibromo-3-chloropropane (DBCP) concentrations in ground water in the eastern San Joaquin Valley, California: Analysis of chemical data and ground-water flow and transport simulations
Future use of the sole-source aquifer near Fresno in the eastern San Joaquin Valley, California, will depend, in part, on how long 1,2-dibromo-3-chloropropane (DBCP), an agricultural fumigant banned from use since the late 1970's, persists at concentrations greater than the maximum contaminant level of 0.2 micrograms per liter (mg/L). Field data indicate that DBCP concentrations in ground water ha
Authors
Karen R. Burow, Sandra Y. Panshin, Neil H. Dubrovsky, David Vanbrocklin, Graham E. Fogg
Nitrate and pesticides in ground water in the eastern San Joaquin Valley, California : occurrence and trends
The occurrence of nitrate and pesticides in ground water in California's eastern San Joaquin Valley may be greatly influenced by the long history of intensive farming and irrigation and the generally permeable sediments. This study, which is part of the U.S. Geological Survey National Water-Quality Assessment Program, was done to assess the quality of the ground water and to do a preliminary evalu
Authors
Karen R. Burow, Sylvia V. Stork, N. M. Dubrovsky
Water quality in the San Joaquin-Tulare basins, California, 1992-95
This report is intended to summarize major findings that emerged between 1992 and 1995 from the water-quality assessment of the San Joaquin-Tulare Basins Study Unit and to relate these findings to water-quality issues of regional and national concern. The information is primarily intended for those who are involved in water-resource management. Yet, the information contained here may also interest
Authors
Neil M. Dubrovsky, Charles R. Kratzer, Larry R. Brown, JoAnn M. Gronberg, Karen R. Burow
Environmental setting of the San Joaquin-Tulare basins, California
The National Water-Quality Assessment Program for the San Joaquin-Tulare Basins began in 1991 to study the effects of natural and anthropogenic influences on the quality of ground water, surface water, biology, and ecology. The San Joaquin-Tulare Basins study unit, which covers approximately 31,200 square miles in central California, is made up of the San Joaquin Valley, the eastern slope of the C
Authors
JoAnn A. Gronberg, Neil M. Dubrovsky, Charles R. Kratzer, Joseph L. Domagalski, Larry R. Brown, Karen R. Burow
Occurrence of nitrate and pesticides in ground water beneath three agricultural land-use settings in the eastern San Joaquin Valley, California, 1993-1995
The processes that affect nitrate and pesticide occurrence may be better understood by relating ground-water quality to natural and human factors in the context of distinct, regionally extensive, land- use settings. This study assesses nitrate and pesticide occurrence in ground water beneath three agricultural land-use settings in the eastern San Joaquin Valley, California. Water samples were coll
Authors
Karen R. Burow, Jennifer L. Shelton, Neil M. Dubrovsky