Brian Edwards (Former Employee)
Science and Products
Filter Total Items: 30
Comparison of groundwater flow in Southern California coastal aquifers Comparison of groundwater flow in Southern California coastal aquifers
Development of the coastal aquifer systems of Southern California has resulted in overdraft, changes in streamflow, seawater intrusion, land subsidence, increased vertical flow between aquifers, and a redirection of regional flow toward pumping centers. These water-management challenges can be more effectively addressed by incorporating new understanding of the geologic, hydrologic, and
Authors
Randall Hanson, John A. Izbicki, Eric Reichard, Brian Edwards, Michael Land, Peter Martin
Stratigraphic controls on saltwater intrusion in the Dominguez Gap area of coastal Los Angeles Stratigraphic controls on saltwater intrusion in the Dominguez Gap area of coastal Los Angeles
The Los Angeles Basin is a densely populated coastal area that significantly depends on groundwater. A part of this groundwater supply is at risk from saltwater intrusion—the impetus for this study. High-resolution seismic-reflection data collected from the Los Angeles–Long Beach Harbor Complex have been combined with borehole geophysical and descriptive geological data from four nearby...
Authors
Brian Edwards, Kenneth Ehman, Daniel Ponti, Eric Reichard, John Tinsley, Robert Rosenbauer, Michael Land
Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California
In a letter to the U.S. Geological Survey (USGS) dated March 25, 2008, Representative Jane Harman (California 36th district) requested advice on geologic hazards that should be considered in the review of a proposed liquefied natural gas (LNG) facility off the California coast in Santa Monica Bay. In 2004, the USGS responded to a similar request from Representative Lois Capps, regarding...
Authors
Stephanie Ross, Homa J. Lee, Tom Parsons, Larry Beyer, David Boore, James Conrad, Brian Edwards, Michael Fisher, Arthur Frankel, Eric Geist, Kenneth Hudnut, Susan Hough, Robert E. Kayen, T.D. Lorenson, Nicolas Luco, Patricia McCrory, Mary McGann, Manuel Nathenson, Michael Nolan, Mark Petersen, Daniel Ponti, Charles Powell, Holly F. Ryan, John C. Tinsley, Chris Wills, Florence Wong, Jingping Xu
A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California
A 3-dimensional computer model of the Quaternary sequence stratigraphy in the Dominguez gap region of Long Beach, California has been developed to provide a robust chronostratigraphic framework for hydrologic and tectonic studies. The model consists of 13 layers within a 16.5 by 16.1 km (10.25 by 10 mile) square area and extends downward to an altitude of -900 meters (-2952.76 feet). Ten...
Authors
Daniel Ponti, Kenneth Ehman, Brian Edwards, John C. Tinsley, Thomas Hildenbrand, John Hillhouse, Randall Hanson, Kristen McDougall, Charles Powell, Elmira Wan, Michael Land, Shannon Mahan, Andrei Sarna-Wojcicki
Exploring rippled scour depressions offshore Huntington Beach, CA Exploring rippled scour depressions offshore Huntington Beach, CA
Morphological model computations based on uniform (non-graded) sediment revealed an unrealistically strong scour of the sea floor in the immediate vicinity to the west of Maasvlakte 2. By means of a state-of-the-art graded sediment transport model the effect of natural armouring and sorting of bed material on the scour process has been examined. Sensitivity computations confirm that the
Authors
Eleyne L. Phillips, Curt D. Storlazzi, Peter Dartnell, Brian Edwards
High-resolution boomer seismic-reflection profiles of the shelf off southern California from cruise A-1-00-SC: Santa Monica Bay to San Diego High-resolution boomer seismic-reflection profiles of the shelf off southern California from cruise A-1-00-SC: Santa Monica Bay to San Diego
High-resolution boomer data were collected in the California Continental Borderland as part of the southern California Earthquake Hazards Task of the Southern California Coastal and Marine Geology Regional Investigations Project. During the period from 1997 to 2002, five data-acquisition cruises collected seismic-reflection data using several different systems from offshore Santa Barbara
Authors
Christina Gutmacher, Stephanie Ross, Peter J. Triezenberg, Ray Sliter, William Normark, Brian Edwards
Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples
This report contains X-ray diffraction (XRD) analysis of mineralogy for 81 sediment samples from cores taken from three drill holes in the Los Angeles Basin in 2000-2001. We analyzed 26 samples from Pier F core, 29 from Pier C core, and 26 from the Webster core. These three sites provide an offshore-onshore record across the Southern California coastal zone. This report is designed to be...
Authors
James Hein, Brandie McIntyre, Brian Edwards, Orion Lakota
Saltwater intrusion in Los Angeles area coastal aquifers: The marine connection Saltwater intrusion in Los Angeles area coastal aquifers: The marine connection
No abstract available.
Authors
Brian Edwards, Kevin Evans
Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MB, P-2-95-MB, and P-1-97-MB Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MB, P-2-95-MB, and P-1-97-MB
In response to the 1992 creation of the Monterey Bay National Marine Sanctuary (MBNMS), the United States Geological Survey (USGS) initiated a multiyear investigation of the Sanctuary continental margin. As part of the investigative effort, this report summarizes the shipboard procedures, subsequent laboratory analyses, and data results from three seafloor sampling cruises conducted on...
Authors
Kevin Orzech, Wendy Dahl, Brian Edwards
Cruise report for A1-00-SC southern California earthquake hazards project, part A Cruise report for A1-00-SC southern California earthquake hazards project, part A
A three-week cruise to obtain high-resolution boomer and multichannel seismic-reflection profiles supported two project activities of the USGS Coastal and Marine Geology (CMG) Program: (1) evaluating the earthquake and related geologic hazards posed by faults in the near offshore area of southern California and (2) determining the pathways through which sea-water is intruding into...
Authors
Christina Gutmacher, William Normark, Stephanie Ross, Brian Edwards, Ray Sliter, Patrick Hart, Becky Cooper, Jon Childs, Jane Reid
Ground-truthing studies of west coast and Gulf of Mexico submarine fans Ground-truthing studies of west coast and Gulf of Mexico submarine fans
No abstract available.
Authors
Homa J. Lee, Robert Kayen, Brian Edwards, Michael Field, James V. Gardner, William Schwab, David Twichell
Science and Products
Filter Total Items: 30
Comparison of groundwater flow in Southern California coastal aquifers Comparison of groundwater flow in Southern California coastal aquifers
Development of the coastal aquifer systems of Southern California has resulted in overdraft, changes in streamflow, seawater intrusion, land subsidence, increased vertical flow between aquifers, and a redirection of regional flow toward pumping centers. These water-management challenges can be more effectively addressed by incorporating new understanding of the geologic, hydrologic, and
Authors
Randall Hanson, John A. Izbicki, Eric Reichard, Brian Edwards, Michael Land, Peter Martin
Stratigraphic controls on saltwater intrusion in the Dominguez Gap area of coastal Los Angeles Stratigraphic controls on saltwater intrusion in the Dominguez Gap area of coastal Los Angeles
The Los Angeles Basin is a densely populated coastal area that significantly depends on groundwater. A part of this groundwater supply is at risk from saltwater intrusion—the impetus for this study. High-resolution seismic-reflection data collected from the Los Angeles–Long Beach Harbor Complex have been combined with borehole geophysical and descriptive geological data from four nearby...
Authors
Brian Edwards, Kenneth Ehman, Daniel Ponti, Eric Reichard, John Tinsley, Robert Rosenbauer, Michael Land
Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California
In a letter to the U.S. Geological Survey (USGS) dated March 25, 2008, Representative Jane Harman (California 36th district) requested advice on geologic hazards that should be considered in the review of a proposed liquefied natural gas (LNG) facility off the California coast in Santa Monica Bay. In 2004, the USGS responded to a similar request from Representative Lois Capps, regarding...
Authors
Stephanie Ross, Homa J. Lee, Tom Parsons, Larry Beyer, David Boore, James Conrad, Brian Edwards, Michael Fisher, Arthur Frankel, Eric Geist, Kenneth Hudnut, Susan Hough, Robert E. Kayen, T.D. Lorenson, Nicolas Luco, Patricia McCrory, Mary McGann, Manuel Nathenson, Michael Nolan, Mark Petersen, Daniel Ponti, Charles Powell, Holly F. Ryan, John C. Tinsley, Chris Wills, Florence Wong, Jingping Xu
A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California
A 3-dimensional computer model of the Quaternary sequence stratigraphy in the Dominguez gap region of Long Beach, California has been developed to provide a robust chronostratigraphic framework for hydrologic and tectonic studies. The model consists of 13 layers within a 16.5 by 16.1 km (10.25 by 10 mile) square area and extends downward to an altitude of -900 meters (-2952.76 feet). Ten...
Authors
Daniel Ponti, Kenneth Ehman, Brian Edwards, John C. Tinsley, Thomas Hildenbrand, John Hillhouse, Randall Hanson, Kristen McDougall, Charles Powell, Elmira Wan, Michael Land, Shannon Mahan, Andrei Sarna-Wojcicki
Exploring rippled scour depressions offshore Huntington Beach, CA Exploring rippled scour depressions offshore Huntington Beach, CA
Morphological model computations based on uniform (non-graded) sediment revealed an unrealistically strong scour of the sea floor in the immediate vicinity to the west of Maasvlakte 2. By means of a state-of-the-art graded sediment transport model the effect of natural armouring and sorting of bed material on the scour process has been examined. Sensitivity computations confirm that the
Authors
Eleyne L. Phillips, Curt D. Storlazzi, Peter Dartnell, Brian Edwards
High-resolution boomer seismic-reflection profiles of the shelf off southern California from cruise A-1-00-SC: Santa Monica Bay to San Diego High-resolution boomer seismic-reflection profiles of the shelf off southern California from cruise A-1-00-SC: Santa Monica Bay to San Diego
High-resolution boomer data were collected in the California Continental Borderland as part of the southern California Earthquake Hazards Task of the Southern California Coastal and Marine Geology Regional Investigations Project. During the period from 1997 to 2002, five data-acquisition cruises collected seismic-reflection data using several different systems from offshore Santa Barbara
Authors
Christina Gutmacher, Stephanie Ross, Peter J. Triezenberg, Ray Sliter, William Normark, Brian Edwards
Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples Quantitative x-ray diffraction mineralogy of Los Angeles basin core samples
This report contains X-ray diffraction (XRD) analysis of mineralogy for 81 sediment samples from cores taken from three drill holes in the Los Angeles Basin in 2000-2001. We analyzed 26 samples from Pier F core, 29 from Pier C core, and 26 from the Webster core. These three sites provide an offshore-onshore record across the Southern California coastal zone. This report is designed to be...
Authors
James Hein, Brandie McIntyre, Brian Edwards, Orion Lakota
Saltwater intrusion in Los Angeles area coastal aquifers: The marine connection Saltwater intrusion in Los Angeles area coastal aquifers: The marine connection
No abstract available.
Authors
Brian Edwards, Kevin Evans
Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MB, P-2-95-MB, and P-1-97-MB Core descriptions, core photographs, physical property logs and surface textural data of sediment cores recovered from the continental shelf of the Monterey Bay National Marine Sanctuary during the research cruises M-1-95-MB, P-2-95-MB, and P-1-97-MB
In response to the 1992 creation of the Monterey Bay National Marine Sanctuary (MBNMS), the United States Geological Survey (USGS) initiated a multiyear investigation of the Sanctuary continental margin. As part of the investigative effort, this report summarizes the shipboard procedures, subsequent laboratory analyses, and data results from three seafloor sampling cruises conducted on...
Authors
Kevin Orzech, Wendy Dahl, Brian Edwards
Cruise report for A1-00-SC southern California earthquake hazards project, part A Cruise report for A1-00-SC southern California earthquake hazards project, part A
A three-week cruise to obtain high-resolution boomer and multichannel seismic-reflection profiles supported two project activities of the USGS Coastal and Marine Geology (CMG) Program: (1) evaluating the earthquake and related geologic hazards posed by faults in the near offshore area of southern California and (2) determining the pathways through which sea-water is intruding into...
Authors
Christina Gutmacher, William Normark, Stephanie Ross, Brian Edwards, Ray Sliter, Patrick Hart, Becky Cooper, Jon Childs, Jane Reid
Ground-truthing studies of west coast and Gulf of Mexico submarine fans Ground-truthing studies of west coast and Gulf of Mexico submarine fans
No abstract available.
Authors
Homa J. Lee, Robert Kayen, Brian Edwards, Michael Field, James V. Gardner, William Schwab, David Twichell