David Schoellhamer (Former Employee)
Science and Products
Filter Total Items: 150
Time series Of suspended-solids concentration, salinity, temperature, and total mercury concentration in San Francisco Bay during water year 1996
Many physical processes affect how constituents within San Francisco Bay vary. Processes and their associated time scales include turbulence (seconds), semidiurnal and diurnal tides (hours), the spring-neap tidal cycle (days), freshwater flow (weeks), seasonal winds (months), ecological and climatic changes (years), and geologic changes (thousands of years). The effect and relative importance of p
Authors
David H. Schoellhamer
Summary of findings about circulation and the estuarine turbidity maximum in Suisun Bay, California
Suisun Bay, California, is the most landward subembayment of San Francisco Bay (fig. 1) and is an important ecological habitat (Cloern and others, 1983; Jassby and others, 1995). During the 1960s and 1970s, data collected in Suisun Bay were analyzed to develop a conceptual model of how water, salt, and sediment move within and through the Bay. This conceptual model has been used to manage freshwat
Authors
David H. Schoellhamer, Jon R. Burau
Sediment transport pathway in the back of a nearly semienclosed subembayment of San Francisco Bay, California
Time series measurements of current velocity, depth and suspended-solids concentration (SSC) were used to obtain suspended-solids fluxes (SSF) during the fall at central Honker Bay and Spoonbill Creek. A wind-induced shear stress increases SSF out of Honker Bay through Spoonbill Creek by combining two effects: (1) wind-wave resuspension of bed sediments, and (2) wind shear raises the water level a
Authors
John C. Warner, David H. Schoellhamer, Jon R. Burau
Time series of trace element concentrations calculated from time series of suspended solids concentrations and RMP water samples: Summary and conclusions
The supply and fate of trace elements in San Francisco Bay, which are partially dependent upon particulate matter in the Estuary, are important management issues. San Francisco Bay receives many waste water discharges, especially in areas south of the Dumbarton Bridge, that contain trace elements that accumulate in benthic organisms (Luoma et al., 1985; Brown and Luoma, 1995). Trace elements tend
Authors
David H. Schoellhamer
Optimum sampling strategy for sediment-associated pesticides in Suisun Bay
The purpose of this study was to develop a twice-a-day sampling strategy for suspended solids concentration at Mallard Island that best reproduces the residual (tidally averaged) near-surface suspended solids concentration computed using the entire time series (96 sampling times per day) for high delta discharge conditions and to use this stratgy for sampling sediment-associated pesticides vvaried
Authors
Bryan W. Jennings, David H. Schoellhamer, Kathryn Kuivila
Summary of suspended-solids concentration data, San Francisco Bay, California, water year 1994
Suspended-solids concentration data were collected in San Francisco Bay during water year 1994. Optical backscatterance sensors and water samples were used to monitor suspended solids continuously at two sites in Suisun Bay, two sites in Central San Francisco Bay, and three sites in South San Francisco Bay. Sensors were positioned at two depths at each site. In addition, a shallow-water instrument
Authors
P.A. Buchanan, D. H. Schoellhamer, R.C. Sheipline
Summary of suspended-solids concentration data, San Francisco Bay, California, Water Year 1995
Suspended-solids concentration data were collected in San Francisco Bay during water year 1995 (October 1, 1994September 30, 1995). Optical backscatterance sensors and water samples were used to monitor suspended solids continuously at two sites in Suisun Bay, two sites in Central San Francisco Bay, and three sites in South San Francisco Bay. Sensors were positioned at two depths at each site. Wat
Authors
P.A. Buchanan, D. H. Schoellhamer
Anthropogenic sediment resuspension mechanisms in a shallow microtidal estuary
The mechanisms that resuspend bottom sediments in Hillsborough Bay, a shallow, microtidal, subtropical estuary in West-central Florida, were determined by analysing hydrodynamic and suspended-solids concentration data collected during several instrument deployments made in 1990 and 1991. Large vessels in a dredged ship channel can generate forced solitary long waves that cause large water velociti
Authors
D. H. Schoellhamer
Factors affecting suspended-solids concentrations in South San Francisco Bay, California
Measurements of suspended-solids concentration (SSC) were made at two depths at three sites in South San Francisco Bay (South Bay) to determine the factors that affect SSC. Twenty-eight segments of reliable and continuous SSC time series data longer than 14 days were collected from late 1991 or 1992 through September 1993. Spectral analysis and singular spectrum analysis were used to relate these
Authors
D. H. Schoellhamer
Central San Francisco Bay suspended-sediment transport processes and comparison of continuous and discrete measurements of suspended-solids concentrations
Sediments are an important component of the San Francisco Bay estuarine system. Potentially toxic substances, such as metals and pesticides, adsorb to sediment particles (Kuwabara and others, 1989; Domagalski and Kuivila, 1993). Sediments on the bottom of the bay provide the habitat for benthic communities that can ingest these substances and introduce them into the food web (Luoma and others, 198
Authors
David H. Schoellhamer
Suspended-solids flux at a shallow-water site in south San Francisco Bay, California
Time series measurements of current velocity and suspended solids-concentration (SSC) made during December 1993 and March 1994 at a shallow-water site in South San Francisco Bay were used to estimate and compare suspended-solids flux during the two periods. In December, the average residual flux at the site was 2.88 g/m/s, to the northeast, whereas in March the average residual flux was four times
Authors
Jessica R. Lacy, David H. Schoellhamer, Jon R. Burau
Summary of suspended-solids concentration data, Central and South San Francisco Bays, California, water years 1992 and 1993
No abstract available.
Authors
Paul A. Buchanan, David H. Schoellhamer
Science and Products
Filter Total Items: 150
Time series Of suspended-solids concentration, salinity, temperature, and total mercury concentration in San Francisco Bay during water year 1996
Many physical processes affect how constituents within San Francisco Bay vary. Processes and their associated time scales include turbulence (seconds), semidiurnal and diurnal tides (hours), the spring-neap tidal cycle (days), freshwater flow (weeks), seasonal winds (months), ecological and climatic changes (years), and geologic changes (thousands of years). The effect and relative importance of p
Authors
David H. Schoellhamer
Summary of findings about circulation and the estuarine turbidity maximum in Suisun Bay, California
Suisun Bay, California, is the most landward subembayment of San Francisco Bay (fig. 1) and is an important ecological habitat (Cloern and others, 1983; Jassby and others, 1995). During the 1960s and 1970s, data collected in Suisun Bay were analyzed to develop a conceptual model of how water, salt, and sediment move within and through the Bay. This conceptual model has been used to manage freshwat
Authors
David H. Schoellhamer, Jon R. Burau
Sediment transport pathway in the back of a nearly semienclosed subembayment of San Francisco Bay, California
Time series measurements of current velocity, depth and suspended-solids concentration (SSC) were used to obtain suspended-solids fluxes (SSF) during the fall at central Honker Bay and Spoonbill Creek. A wind-induced shear stress increases SSF out of Honker Bay through Spoonbill Creek by combining two effects: (1) wind-wave resuspension of bed sediments, and (2) wind shear raises the water level a
Authors
John C. Warner, David H. Schoellhamer, Jon R. Burau
Time series of trace element concentrations calculated from time series of suspended solids concentrations and RMP water samples: Summary and conclusions
The supply and fate of trace elements in San Francisco Bay, which are partially dependent upon particulate matter in the Estuary, are important management issues. San Francisco Bay receives many waste water discharges, especially in areas south of the Dumbarton Bridge, that contain trace elements that accumulate in benthic organisms (Luoma et al., 1985; Brown and Luoma, 1995). Trace elements tend
Authors
David H. Schoellhamer
Optimum sampling strategy for sediment-associated pesticides in Suisun Bay
The purpose of this study was to develop a twice-a-day sampling strategy for suspended solids concentration at Mallard Island that best reproduces the residual (tidally averaged) near-surface suspended solids concentration computed using the entire time series (96 sampling times per day) for high delta discharge conditions and to use this stratgy for sampling sediment-associated pesticides vvaried
Authors
Bryan W. Jennings, David H. Schoellhamer, Kathryn Kuivila
Summary of suspended-solids concentration data, San Francisco Bay, California, water year 1994
Suspended-solids concentration data were collected in San Francisco Bay during water year 1994. Optical backscatterance sensors and water samples were used to monitor suspended solids continuously at two sites in Suisun Bay, two sites in Central San Francisco Bay, and three sites in South San Francisco Bay. Sensors were positioned at two depths at each site. In addition, a shallow-water instrument
Authors
P.A. Buchanan, D. H. Schoellhamer, R.C. Sheipline
Summary of suspended-solids concentration data, San Francisco Bay, California, Water Year 1995
Suspended-solids concentration data were collected in San Francisco Bay during water year 1995 (October 1, 1994September 30, 1995). Optical backscatterance sensors and water samples were used to monitor suspended solids continuously at two sites in Suisun Bay, two sites in Central San Francisco Bay, and three sites in South San Francisco Bay. Sensors were positioned at two depths at each site. Wat
Authors
P.A. Buchanan, D. H. Schoellhamer
Anthropogenic sediment resuspension mechanisms in a shallow microtidal estuary
The mechanisms that resuspend bottom sediments in Hillsborough Bay, a shallow, microtidal, subtropical estuary in West-central Florida, were determined by analysing hydrodynamic and suspended-solids concentration data collected during several instrument deployments made in 1990 and 1991. Large vessels in a dredged ship channel can generate forced solitary long waves that cause large water velociti
Authors
D. H. Schoellhamer
Factors affecting suspended-solids concentrations in South San Francisco Bay, California
Measurements of suspended-solids concentration (SSC) were made at two depths at three sites in South San Francisco Bay (South Bay) to determine the factors that affect SSC. Twenty-eight segments of reliable and continuous SSC time series data longer than 14 days were collected from late 1991 or 1992 through September 1993. Spectral analysis and singular spectrum analysis were used to relate these
Authors
D. H. Schoellhamer
Central San Francisco Bay suspended-sediment transport processes and comparison of continuous and discrete measurements of suspended-solids concentrations
Sediments are an important component of the San Francisco Bay estuarine system. Potentially toxic substances, such as metals and pesticides, adsorb to sediment particles (Kuwabara and others, 1989; Domagalski and Kuivila, 1993). Sediments on the bottom of the bay provide the habitat for benthic communities that can ingest these substances and introduce them into the food web (Luoma and others, 198
Authors
David H. Schoellhamer
Suspended-solids flux at a shallow-water site in south San Francisco Bay, California
Time series measurements of current velocity and suspended solids-concentration (SSC) made during December 1993 and March 1994 at a shallow-water site in South San Francisco Bay were used to estimate and compare suspended-solids flux during the two periods. In December, the average residual flux at the site was 2.88 g/m/s, to the northeast, whereas in March the average residual flux was four times
Authors
Jessica R. Lacy, David H. Schoellhamer, Jon R. Burau
Summary of suspended-solids concentration data, Central and South San Francisco Bays, California, water years 1992 and 1993
No abstract available.
Authors
Paul A. Buchanan, David H. Schoellhamer