Bruce Jaffe (Former Employee)
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Mercury-contaminated hydraulic mining debris in San Francisco Bay
The hydraulic gold-mining process used during the California Gold Rush and in many developing countries today contributes enormous amounts of sediment to rivers and streams. Commonly, accompanying this sediment are contaminants such as elemental mercury and cyanide used in the gold extraction process. We show that some of the mercurycontaminated sediment created by hydraulic gold mining in the Sie
Authors
Robin M. Bouse, Christopher C. Fuller, Samuel N. Luoma, Michelle I. Hornberger, Bruce E. Jaffe, Richard E. Smith
Hindcasting of decadal‐timescale estuarine bathymetric change with a tidal‐timescale model
Hindcasting decadal-timescale bathymetric change in estuaries is prone to error due to limited data for initial conditions, boundary forcing, and calibration; computational limitations further hinder efforts. We developed and calibrated a tidal-timescale model to bathymetric change in Suisun Bay, California, over the 1867–1887 period. A general, multiple-timescale calibration ensured robustness ov
Authors
Neil K. Ganju, David H. Schoellhamer, Bruce E. Jaffe
Sediment deposition, erosion, and bathymetric change in central San Francisco Bay: 1855-1979
Central San Francisco Bay is the hub of a dynamic estuarine system connecting the San Joaquin and Sacramento River Deltas, Suisun Bay, and San Pablo Bay to the Pacific Ocean and South San Francisco Bay. To understand the role that Central San Francisco Bay plays in sediment transport throughout the system, it is necessary to first determine historical changes in patterns of sediment deposition and
Authors
Theresa A. Fregoso, Amy C. Foxgrover, Bruce E. Jaffe
2005 hydrographic survey of south San Francisco Bay, California
An acoustic hydrographic survey of South San Francisco Bay (South Bay) was conducted in 2005. Over 20 million soundings were collected within an area of approximately 250 sq km (97 sq mi) of the bay extending south of Coyote Point on the west shore, to the San Leandro marina on the east, including Coyote Creek and Ravenswood, Alviso, Artesian, and Mud Sloughs. This is the first survey of this scal
Authors
Amy C. Foxgrover, Bruce E. Jaffe, Gerald T. Hovis, Craig A. Martin, James R. Hubbard, Manoj R. Samant, Steve M. Sullivan
Physical criteria for distinguishing sandy tsunami and storm deposits using modern examples
Modern subaerial sand beds deposited by major tsunamis and hurricanes were compared at trench, transect, and sub-regional spatial scales to evaluate which attributes are most useful for distinguishing the two types of deposits. Physical criteria that may be diagnostic include: sediment composition, textures and grading, types and organization of stratification, thickness, geometry, and landscape c
Authors
Robert A. Morton, Guy Gelfenbaum, Bruce E. Jaffe
Reconstructing sediment age profiles from historical bathymetry changes in San Pablo Bay, California
Sediment age profiles reconstructed from a sequence of historical bathymetry changes are used to investigate the subsurface distribution of historical sediments in a subembayment of the San Francisco Estuary. Profiles are created in a grid-based GIS modeling program that stratifies historical deposition into temporal horizons. The model's reconstructions are supported by comparisons to profiles of
Authors
Shawn A. Higgins, Bruce E. Jaffe, Christopher C. Fuller
Reconnaissance investigation of Caribbean extreme wave deposits — Preliminary observations, interpretations, and research directions
This report presents an overview of preliminary geological investigations and recommended future research activities in the Caribbean region pertaining to coastal hazards with an emphasis on establishing tsunami risk for U.S. territories. Fieldwork was conducted in March 2006 on the islands of Bonaire, Puerto Rico, and Guadeloupe to evaluate the stratigraphic records of extreme wave deposits as p
Authors
Robert A. Morton, Bruce M. Richmond, Bruce E. Jaffe, Guy Gelfenbaum
Sri Lanka field survey after the December 2004 Indian Ocean tsunami
An International Tsunami Survey Team (ITST) consisting of scientists from the United States, New Zealand, and Sri Lanka evaluated the impacts of the 26 December 2004 transoceanic tsunami in Sri Lanka two weeks after the event. Tsunami runup height, inundation distance, morphological changes, and sedimentary characteristics of deposits were recorded and analyzed along the southwest and east coasts
Authors
James Goff, Philip L-F. Liu, Bretwood Higman, Robert Morton, Bruce E. Jaffe, Haindra Fernando, Patrick Lynett, Hermann Fritz, Costas Synolakis, Starin Fernando
South San Francisco Bay 2004 topographic lidar survey: Data overview and preliminary quality assessment
Tidal wetlands in South San Francisco Bay (South Bay) have decreased by over 80% in the past 150 years. The California Coastal Conservancy, in conjunction with other state and federal agencies, is collaboratively managing an effort to restore approximately 61 km2 (15,100 acres) of commercial salt evaporation ponds in South Bay to mixed intertidal habitat. In order to best develop restoration strat
Authors
Amy C. Foxgrover, Bruce E. Jaffe
Bay sediment budget: Sediment accounting 101
Comparison of a budget developed for 1955-1990 with a budget developed for 1995- 2002 showed decreasing sediment inflow and increased amounts leaving the Bay to upland disposal and sand mining, resulting in an increased rate of erosion of sediment from the Bay floor
Finding a way to shift disposal from the Ocean back to the Bay could provide sediment for restoration projects and decrease dredging
Authors
David H. Schoellhamer, Megan A. Lionberger, Bruce E. Jaffe, Neil K. Ganju, Scott A. Wright, Gregory Shellenbarger
Bathychronology: reconstructing historical sedimentation from bathymetric data in a GIS
No abstract available.
Authors
Shawn A. Higgins, Bruce E. Jaffe, Richard E. Smith
Deposition, erosion, and bathymetric change in South San Francisco Bay: 1858-1983
Since the California Gold Rush of 1849, sediment deposition, erosion, and the bathymetry of South San Francisco Bay have been altered by both natural processes and human activities. Historical hydrographic surveys can be used to assess how this system has evolved over the past 150 years. The National Ocean Service (NOS) (formerly the United States Coast and Geodetic Survey (USCGS), collected five
Authors
Amy C. Foxgrover, Shawn A. Higgins, Melissa K. Ingraca, Bruce E. Jaffe, Richard E. Smith
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Mercury-contaminated hydraulic mining debris in San Francisco Bay
The hydraulic gold-mining process used during the California Gold Rush and in many developing countries today contributes enormous amounts of sediment to rivers and streams. Commonly, accompanying this sediment are contaminants such as elemental mercury and cyanide used in the gold extraction process. We show that some of the mercurycontaminated sediment created by hydraulic gold mining in the SieAuthorsRobin M. Bouse, Christopher C. Fuller, Samuel N. Luoma, Michelle I. Hornberger, Bruce E. Jaffe, Richard E. SmithHindcasting of decadal‐timescale estuarine bathymetric change with a tidal‐timescale model
Hindcasting decadal-timescale bathymetric change in estuaries is prone to error due to limited data for initial conditions, boundary forcing, and calibration; computational limitations further hinder efforts. We developed and calibrated a tidal-timescale model to bathymetric change in Suisun Bay, California, over the 1867–1887 period. A general, multiple-timescale calibration ensured robustness ovAuthorsNeil K. Ganju, David H. Schoellhamer, Bruce E. JaffeSediment deposition, erosion, and bathymetric change in central San Francisco Bay: 1855-1979
Central San Francisco Bay is the hub of a dynamic estuarine system connecting the San Joaquin and Sacramento River Deltas, Suisun Bay, and San Pablo Bay to the Pacific Ocean and South San Francisco Bay. To understand the role that Central San Francisco Bay plays in sediment transport throughout the system, it is necessary to first determine historical changes in patterns of sediment deposition andAuthorsTheresa A. Fregoso, Amy C. Foxgrover, Bruce E. Jaffe2005 hydrographic survey of south San Francisco Bay, California
An acoustic hydrographic survey of South San Francisco Bay (South Bay) was conducted in 2005. Over 20 million soundings were collected within an area of approximately 250 sq km (97 sq mi) of the bay extending south of Coyote Point on the west shore, to the San Leandro marina on the east, including Coyote Creek and Ravenswood, Alviso, Artesian, and Mud Sloughs. This is the first survey of this scalAuthorsAmy C. Foxgrover, Bruce E. Jaffe, Gerald T. Hovis, Craig A. Martin, James R. Hubbard, Manoj R. Samant, Steve M. SullivanPhysical criteria for distinguishing sandy tsunami and storm deposits using modern examples
Modern subaerial sand beds deposited by major tsunamis and hurricanes were compared at trench, transect, and sub-regional spatial scales to evaluate which attributes are most useful for distinguishing the two types of deposits. Physical criteria that may be diagnostic include: sediment composition, textures and grading, types and organization of stratification, thickness, geometry, and landscape cAuthorsRobert A. Morton, Guy Gelfenbaum, Bruce E. JaffeReconstructing sediment age profiles from historical bathymetry changes in San Pablo Bay, California
Sediment age profiles reconstructed from a sequence of historical bathymetry changes are used to investigate the subsurface distribution of historical sediments in a subembayment of the San Francisco Estuary. Profiles are created in a grid-based GIS modeling program that stratifies historical deposition into temporal horizons. The model's reconstructions are supported by comparisons to profiles ofAuthorsShawn A. Higgins, Bruce E. Jaffe, Christopher C. FullerReconnaissance investigation of Caribbean extreme wave deposits — Preliminary observations, interpretations, and research directions
This report presents an overview of preliminary geological investigations and recommended future research activities in the Caribbean region pertaining to coastal hazards with an emphasis on establishing tsunami risk for U.S. territories. Fieldwork was conducted in March 2006 on the islands of Bonaire, Puerto Rico, and Guadeloupe to evaluate the stratigraphic records of extreme wave deposits as pAuthorsRobert A. Morton, Bruce M. Richmond, Bruce E. Jaffe, Guy GelfenbaumSri Lanka field survey after the December 2004 Indian Ocean tsunami
An International Tsunami Survey Team (ITST) consisting of scientists from the United States, New Zealand, and Sri Lanka evaluated the impacts of the 26 December 2004 transoceanic tsunami in Sri Lanka two weeks after the event. Tsunami runup height, inundation distance, morphological changes, and sedimentary characteristics of deposits were recorded and analyzed along the southwest and east coastsAuthorsJames Goff, Philip L-F. Liu, Bretwood Higman, Robert Morton, Bruce E. Jaffe, Haindra Fernando, Patrick Lynett, Hermann Fritz, Costas Synolakis, Starin FernandoSouth San Francisco Bay 2004 topographic lidar survey: Data overview and preliminary quality assessment
Tidal wetlands in South San Francisco Bay (South Bay) have decreased by over 80% in the past 150 years. The California Coastal Conservancy, in conjunction with other state and federal agencies, is collaboratively managing an effort to restore approximately 61 km2 (15,100 acres) of commercial salt evaporation ponds in South Bay to mixed intertidal habitat. In order to best develop restoration stratAuthorsAmy C. Foxgrover, Bruce E. JaffeBay sediment budget: Sediment accounting 101
Comparison of a budget developed for 1955-1990 with a budget developed for 1995- 2002 showed decreasing sediment inflow and increased amounts leaving the Bay to upland disposal and sand mining, resulting in an increased rate of erosion of sediment from the Bay floor Finding a way to shift disposal from the Ocean back to the Bay could provide sediment for restoration projects and decrease dredgingAuthorsDavid H. Schoellhamer, Megan A. Lionberger, Bruce E. Jaffe, Neil K. Ganju, Scott A. Wright, Gregory ShellenbargerBathychronology: reconstructing historical sedimentation from bathymetric data in a GIS
No abstract available.AuthorsShawn A. Higgins, Bruce E. Jaffe, Richard E. SmithDeposition, erosion, and bathymetric change in South San Francisco Bay: 1858-1983
Since the California Gold Rush of 1849, sediment deposition, erosion, and the bathymetry of South San Francisco Bay have been altered by both natural processes and human activities. Historical hydrographic surveys can be used to assess how this system has evolved over the past 150 years. The National Ocean Service (NOS) (formerly the United States Coast and Geodetic Survey (USCGS), collected fiveAuthorsAmy C. Foxgrover, Shawn A. Higgins, Melissa K. Ingraca, Bruce E. Jaffe, Richard E. Smith - News