Publications
For more than a century, USGS scientists have conducted research in California’s Bay-Delta region. Informing natural-resource management decisions on the region’s issues, this research has been published in thousands of documents, some highlighted below.
Filter Total Items: 307
Effects of reduced wastewater phosphate concentrations in South San Francisco Bay Effects of reduced wastewater phosphate concentrations in South San Francisco Bay
No abstract available.
Authors
S.W. Hager, L. E. Schemel
A numerical model of sediment transport applied to San Francisco Bay, California A numerical model of sediment transport applied to San Francisco Bay, California
A two dimensional depth-averaged sediment transport model is used to simulate field measurements of suspended sediment concentrations in northern San Francisco Bay. The model uses a semi-implicit finite difference method to solve the shallow water equations and incorporates standard empirical expressions for erosion and deposition of sediments into the transport equation as source/sink...
Authors
E.T. Mcdonald, R. T. Cheng
Diagnosing the flood of 1997 in San Francisco Bay with observations and model results Diagnosing the flood of 1997 in San Francisco Bay with observations and model results
No abstract available.
Authors
Noah Knowles, Daniel Cayan, Reginald J. Uncles, Lynn Ingram, Dave Peterson
Selenium trends in north San Francisco Bay Selenium trends in north San Francisco Bay
No abstract available.
Authors
S. N. Luoma, R. Linville
Studies of the San Francisco Bay, California, estuarine ecosystem; pilot regional monitoring results, 1995 Studies of the San Francisco Bay, California, estuarine ecosystem; pilot regional monitoring results, 1995
No abstract available.
Authors
Jody L. Edmunds, B.E. Cole, J. E. Cloern, R.G. Dufford
A comparison of selenium and mercury concentrations in transplanted and resident bivalves from North San Francisco Bay A comparison of selenium and mercury concentrations in transplanted and resident bivalves from North San Francisco Bay
Many of the methodologies for effective use of organisms to monitor and study contamination in estuaries are well established (Phillips, 1980; Phillips and Rainbow, 1993). Understanding the processes that determine bioaccumulation and determining concentrations of contaminants in biological tissues are best employed in conjunction with analysis of other environmental media (e.g., water...
Authors
Samuel N. Luoma, Regina Linville
Factors affecting suspended-solids concentrations in South San Francisco Bay, California 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...
Authors
D. H. Schoellhamer
Suspended-solids flux at a shallow-water site in south San Francisco Bay, California 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...
Authors
Jessica R. Lacy, David H. Schoellhamer, Jon R. Burau
Sierra Nevada runoff into San Francisco Bay - Why has it come earlier recently? Sierra Nevada runoff into San Francisco Bay - Why has it come earlier recently?
By the time most of the Sierra Nevada snowpack has melted each summer, freshwater outflows from the Sacramento-San Joaquin Delta to San Francisco Bay are typically small, even after the wettest winters. These small delta outflows during the warm months (in comparison with the large flows of winter and spring) are overwhelmed by salty coastal waters, and the bay becomes more and more...
Authors
M. D. Dettinger, D.R. Cayan, D. H. Peterson
USGS supports ecosystem management in the San Francisco bay and delta USGS supports ecosystem management in the San Francisco bay and delta
In the past several years, the Department of the Interior has ,l?laced particular emphasis on "ecosystem management" - the integration of scientific knowledge of ecological relationships with resource management practices to sustain ecological, cultural, and economic systems in broad habitat areas; eg., forest, desert, and aquatic habitats. The goal of ecosystem management is to...
Authors
Frederic H. Nichols
Year-to-year fluctuation of the spring phytoplankton bloom in south San Francisco Bay: An example of ecological variability at the land-sea interface Year-to-year fluctuation of the spring phytoplankton bloom in south San Francisco Bay: An example of ecological variability at the land-sea interface
Estuaries are transitional ecosystems at the interface of the terrestrial and marine realms. Their unique physiographic position gives rise to large spatial variability, and to dynamic temporal variability resulting, in part, from a variety of forces and fluxes at the oceanic and terrestrial boundaries. River flow, in particular, is an important mechanism for delivering watershed-derived...
Authors
James E. Cloern, Alan D. Jassby