John Izbicki
John Izbicki - California Water Science Center
Science and Products
Filter Total Items: 103
Temporal changes in the vertical distribution of flow and chloride in deep wells Temporal changes in the vertical distribution of flow and chloride in deep wells
The combination of flowmeter and depth-dependent water-quality data was used to evaluate the quantity and source of high-chloride water yielded from different depths to eight production wells in the Pleasant Valley area of southern California. The wells were screened from 117 to 437 m below land surface, and in most cases, flow from the aquifer into the wells was not uniformly...
Authors
John A. Izbicki, Allen H. Christensen, Mark W. Newhouse, Gregory A. Smith, Randall T. Hanson
Inorganic, isotopic, and organic composition of high-chloride water from wells in a coastal southern California aquifer Inorganic, isotopic, and organic composition of high-chloride water from wells in a coastal southern California aquifer
Chloride concentrations were as high as 230 mg/L in water from the surface discharge of long-screened production wells in Pleasant Valley, Calif., about 100 km NW of Los Angeles. Wells with the higher Cl− concentrations were near faults that bound the valley. Depending on well construction, high-Cl−water from different sources may enter a well at different depths. For example, Cl−...
Authors
John A. Izbicki, Allen H. Christensen, Mark W. Newhouse, George R. Aiken
Comparison of velocity-log data collected using impeller and electromagnetic flowmeters Comparison of velocity-log data collected using impeller and electromagnetic flowmeters
Previous studies have used flowmeters in environments that are within the expectations of their published ranges. Electromagnetic flowmeters have a published range from 0.1 to 79.0 m/min, and impeller flowmeters have a published range from 1.2 to 61.0 m/min. Velocity-log data collected in five long-screened production wells in the Pleasant Valley area of southern California showed that...
Authors
M.W. Newhouse, J. A. Izbicki, G.A. Smith
Source and movement of helium in the eastern Morongo groundwater Basin: The influence of regional tectonics on crustal and mantle helium fluxes Source and movement of helium in the eastern Morongo groundwater Basin: The influence of regional tectonics on crustal and mantle helium fluxes
We assess the role of fracturing and seismicity on fluid-driven mass transport of helium using groundwaters from the eastern Morongo Basin (EMB), California, USA. The EMB, located ???200 km east of Los Angeles, lies within a tectonically active region known as the Eastern California Shear Zone that exhibits both strike-slip and extensional deformation. Helium concentrations from 27...
Authors
J.T. Kulongoski, David R. Hilton, J. A. Izbicki
Evaluation of geohydrologic framework, recharge estimates and ground-water flow of the Joshua Tree area, San Bernardino County, California Evaluation of geohydrologic framework, recharge estimates and ground-water flow of the Joshua Tree area, San Bernardino County, California
Ground water historically has been the sole source of water supply for the community of Joshua Tree in the Joshua Tree ground-water subbasin of the Morongo ground-water basin in the southern Mojave Desert. The Joshua Basin Water District (JBWD) supplies water to the community from the underlying Joshua Tree ground-water subbasin. The JBWD is concerned with the long-term sustainability of...
Authors
Tracy Nishikawa, John A. Izbicki, Joseph A. Hevesi, Christina L. Stamos, Peter Martin
Microbial and Dissolved Organic Carbon Characterization of Stormflow in the Santa Ana River at Imperial Highway, Southern California, 1999-2002 Microbial and Dissolved Organic Carbon Characterization of Stormflow in the Santa Ana River at Imperial Highway, Southern California, 1999-2002
The Santa Ana River drains about 2,670 square miles of densely populated coastal southern California, near Los Angeles. Almost all the flow in the river, more than 200,000 acre-feet annually, is diverted to ponds where it infiltrates and recharges underlying aquifers pumped to supply water for more than 2 million people. Base flow in the river is almost entirely treated municipal...
Authors
John A. Izbicki, M. Isabel Pimentel, Menu Leddy, Brian A. Bergamaschi
Occurrence of hexavalent chromium in ground water in the western Mojave Desert, California Occurrence of hexavalent chromium in ground water in the western Mojave Desert, California
About 200 samples from selected public supply, domestic, and observation wells completed in alluvial aquifers underlying the western Mojave Desert were analyzed for total dissolved Cr and Cr(VI). Because Cr(VI) is difficult to preserve, samples were analyzed by 3 methods. Chromium(VI) was determined in the field using both a direct colorimetric method and EPA method 218.6, and samples...
Authors
J.W. Ball, J. A. Izbicki
Comparison of ground-water flow model particle-tracking results and isotopic data in the Mojave River ground-water basin, southern California, USA Comparison of ground-water flow model particle-tracking results and isotopic data in the Mojave River ground-water basin, southern California, USA
Flow-path and time-of-travel results for the Mojave River ground-water basin, southern California, calculated using the ground-water flow model MODFLOW and particle-tracking model MODPATH were similar to flow path and time-of-travel interpretations derived from delta-deuterium and carbon-14 data. Model and isotopic data both show short flow paths and young ground-water ages throughout...
Authors
John A. Izbicki, Christina L. Stamos, Tracy Nishikawa, Peter Martin
Source and Movement of Ground Water in the Western Part of the Mojave Desert, Southern California, USA Source and Movement of Ground Water in the Western Part of the Mojave Desert, Southern California, USA
Delta oxygen-18 and delta deuterium composition of precipitation and water from wells in the Mojave River and the Morongo ground-water basins in the western part of the Mojave Desert show that ground-water recharge occurs primarily from winter precipitation near low-altitude passes in the San Bernardino and the San Gabriel Mountains?as opposed to runoff from higher altitudes in the...
Authors
John A. Izbicki
Movement and Age of Ground Water in the Western Part of the Mojave Desert, Southern California, USA Movement and Age of Ground Water in the Western Part of the Mojave Desert, Southern California, USA
Tritium and carbon-14 data in water from wells in the Mojave River and the Morongo ground-water basins in the western part of the Mojave Desert show recent recharge focused in the floodplain aquifer along the Mojave River. Older ground water was present in parts of the regional aquifer that surround and underlie the floodplain aquifer. Movement of water between the floodplain and the...
Authors
John A. Izbicki, Robert L. Michel
Geologic Setting, Geohydrology, and Ground-Water Quality near the Helendale Fault in the Mojave River Basin, San Bernardino County, California Geologic Setting, Geohydrology, and Ground-Water Quality near the Helendale Fault in the Mojave River Basin, San Bernardino County, California
The proximity of the Mojave River ground-water basin to the highly urbanized Los Angeles region has resulted in rapid population growth and, consequently, an increase in the demand for water. The Mojave River, the primary source of surface water for the region, normally is dry--except for periods of flow after intense storms; therefore, the region relies almost entirely on ground water...
Authors
Christina L. Stamos, Brett F. Cox, John A. Izbicki, Gregory O. Mendez
Science and Products
Filter Total Items: 103
Temporal changes in the vertical distribution of flow and chloride in deep wells Temporal changes in the vertical distribution of flow and chloride in deep wells
The combination of flowmeter and depth-dependent water-quality data was used to evaluate the quantity and source of high-chloride water yielded from different depths to eight production wells in the Pleasant Valley area of southern California. The wells were screened from 117 to 437 m below land surface, and in most cases, flow from the aquifer into the wells was not uniformly...
Authors
John A. Izbicki, Allen H. Christensen, Mark W. Newhouse, Gregory A. Smith, Randall T. Hanson
Inorganic, isotopic, and organic composition of high-chloride water from wells in a coastal southern California aquifer Inorganic, isotopic, and organic composition of high-chloride water from wells in a coastal southern California aquifer
Chloride concentrations were as high as 230 mg/L in water from the surface discharge of long-screened production wells in Pleasant Valley, Calif., about 100 km NW of Los Angeles. Wells with the higher Cl− concentrations were near faults that bound the valley. Depending on well construction, high-Cl−water from different sources may enter a well at different depths. For example, Cl−...
Authors
John A. Izbicki, Allen H. Christensen, Mark W. Newhouse, George R. Aiken
Comparison of velocity-log data collected using impeller and electromagnetic flowmeters Comparison of velocity-log data collected using impeller and electromagnetic flowmeters
Previous studies have used flowmeters in environments that are within the expectations of their published ranges. Electromagnetic flowmeters have a published range from 0.1 to 79.0 m/min, and impeller flowmeters have a published range from 1.2 to 61.0 m/min. Velocity-log data collected in five long-screened production wells in the Pleasant Valley area of southern California showed that...
Authors
M.W. Newhouse, J. A. Izbicki, G.A. Smith
Source and movement of helium in the eastern Morongo groundwater Basin: The influence of regional tectonics on crustal and mantle helium fluxes Source and movement of helium in the eastern Morongo groundwater Basin: The influence of regional tectonics on crustal and mantle helium fluxes
We assess the role of fracturing and seismicity on fluid-driven mass transport of helium using groundwaters from the eastern Morongo Basin (EMB), California, USA. The EMB, located ???200 km east of Los Angeles, lies within a tectonically active region known as the Eastern California Shear Zone that exhibits both strike-slip and extensional deformation. Helium concentrations from 27...
Authors
J.T. Kulongoski, David R. Hilton, J. A. Izbicki
Evaluation of geohydrologic framework, recharge estimates and ground-water flow of the Joshua Tree area, San Bernardino County, California Evaluation of geohydrologic framework, recharge estimates and ground-water flow of the Joshua Tree area, San Bernardino County, California
Ground water historically has been the sole source of water supply for the community of Joshua Tree in the Joshua Tree ground-water subbasin of the Morongo ground-water basin in the southern Mojave Desert. The Joshua Basin Water District (JBWD) supplies water to the community from the underlying Joshua Tree ground-water subbasin. The JBWD is concerned with the long-term sustainability of...
Authors
Tracy Nishikawa, John A. Izbicki, Joseph A. Hevesi, Christina L. Stamos, Peter Martin
Microbial and Dissolved Organic Carbon Characterization of Stormflow in the Santa Ana River at Imperial Highway, Southern California, 1999-2002 Microbial and Dissolved Organic Carbon Characterization of Stormflow in the Santa Ana River at Imperial Highway, Southern California, 1999-2002
The Santa Ana River drains about 2,670 square miles of densely populated coastal southern California, near Los Angeles. Almost all the flow in the river, more than 200,000 acre-feet annually, is diverted to ponds where it infiltrates and recharges underlying aquifers pumped to supply water for more than 2 million people. Base flow in the river is almost entirely treated municipal...
Authors
John A. Izbicki, M. Isabel Pimentel, Menu Leddy, Brian A. Bergamaschi
Occurrence of hexavalent chromium in ground water in the western Mojave Desert, California Occurrence of hexavalent chromium in ground water in the western Mojave Desert, California
About 200 samples from selected public supply, domestic, and observation wells completed in alluvial aquifers underlying the western Mojave Desert were analyzed for total dissolved Cr and Cr(VI). Because Cr(VI) is difficult to preserve, samples were analyzed by 3 methods. Chromium(VI) was determined in the field using both a direct colorimetric method and EPA method 218.6, and samples...
Authors
J.W. Ball, J. A. Izbicki
Comparison of ground-water flow model particle-tracking results and isotopic data in the Mojave River ground-water basin, southern California, USA Comparison of ground-water flow model particle-tracking results and isotopic data in the Mojave River ground-water basin, southern California, USA
Flow-path and time-of-travel results for the Mojave River ground-water basin, southern California, calculated using the ground-water flow model MODFLOW and particle-tracking model MODPATH were similar to flow path and time-of-travel interpretations derived from delta-deuterium and carbon-14 data. Model and isotopic data both show short flow paths and young ground-water ages throughout...
Authors
John A. Izbicki, Christina L. Stamos, Tracy Nishikawa, Peter Martin
Source and Movement of Ground Water in the Western Part of the Mojave Desert, Southern California, USA Source and Movement of Ground Water in the Western Part of the Mojave Desert, Southern California, USA
Delta oxygen-18 and delta deuterium composition of precipitation and water from wells in the Mojave River and the Morongo ground-water basins in the western part of the Mojave Desert show that ground-water recharge occurs primarily from winter precipitation near low-altitude passes in the San Bernardino and the San Gabriel Mountains?as opposed to runoff from higher altitudes in the...
Authors
John A. Izbicki
Movement and Age of Ground Water in the Western Part of the Mojave Desert, Southern California, USA Movement and Age of Ground Water in the Western Part of the Mojave Desert, Southern California, USA
Tritium and carbon-14 data in water from wells in the Mojave River and the Morongo ground-water basins in the western part of the Mojave Desert show recent recharge focused in the floodplain aquifer along the Mojave River. Older ground water was present in parts of the regional aquifer that surround and underlie the floodplain aquifer. Movement of water between the floodplain and the...
Authors
John A. Izbicki, Robert L. Michel
Geologic Setting, Geohydrology, and Ground-Water Quality near the Helendale Fault in the Mojave River Basin, San Bernardino County, California Geologic Setting, Geohydrology, and Ground-Water Quality near the Helendale Fault in the Mojave River Basin, San Bernardino County, California
The proximity of the Mojave River ground-water basin to the highly urbanized Los Angeles region has resulted in rapid population growth and, consequently, an increase in the demand for water. The Mojave River, the primary source of surface water for the region, normally is dry--except for periods of flow after intense storms; therefore, the region relies almost entirely on ground water...
Authors
Christina L. Stamos, Brett F. Cox, John A. Izbicki, Gregory O. Mendez