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Filter Total Items: 612
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Year Published: 2003

Tidal truncation and barotropic convergence in a channel network tidally driven from opposing entrances

Residual circulation patterns in a channel network that is tidally driven from entrances on opposite sides are controlled by the temporal phasing and spatial asymmetry of the two forcing tides. The Napa/Sonoma Marsh Complex in San Francisco Bay, CA, is such a system. A sill on the west entrance to the system prevents a complete tidal range at...

Warner, J.C.; Schoellhamer, D.; Schladow, G.
Tidal truncation and barotropic convergence in a channel network tidally driven from opposing entrances; 2003; Article; Journal; Estuarine, Coastal and Shelf Science; Warner, J. C.; Schoellhamer, D.; Schladow, G.

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Year Published: 2003

Trends in the sediment yield of the Sacramento River, 1957-2001

No abstract available.

Wright, S.A.; Schoellhamer, D.H.
Attribution: Pacific

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Year Published: 2003

Linking diurnal cycles of river flow to interannual variations in climate

Many rivers in the Western United States have diurnal variations exceeding 10% of their mean flow in the spring and summer months. The shape and timing of the diurnal cycle is influenced by an interplay of the snow, topography, vegetation, and meteorology in a basin, and the measured result differs between wet and dry years. The largest...

Lundquist, Jessica D.; Dettinger, Michael D.
Attribution: Pacific

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Year Published: 2003

Near-field receiving water monitoring of a benthic community near the Palo Alto Water Quality Control Plant in South San Francisco Bay: February 1974 through December 2002

Analyses of the benthic community structure over a 28-year period show that changes in the community have occurred concurrent with reduced concentrations of metals in the sediment and in the tissues of the biosentinal clam Macoma balthica from the same area. The community has shifted from being dominated by several opportunistic species to a...

Shouse, Michelle K.; Parcheso, Francis; Thompson, Janet K.
Attribution: Pacific
Near-field receiving water monitoring of a benthic community near the Palo Alto Water Quality Control Plant in South San Francisco Bay: February 1974 through December 2002; 2003; OFR; 2003-224; Shouse, Michelle K.; Parchaso, Francis; Thompson, Janet K.

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Year Published: 2003

Salinity and temperature in South San Francisco Bay, California, at Dumbarton Bridge: results from the 1999-2002 water years and an overview of previous data

Salinity and temperature were measured in near-surface waters at Dumbarton Bridge in South San Francisco Bay during the 1999?2002 water years (1999WY?2002WY). The complete data set from this site, which included 1990WY?1993WY and 1995WY?1998WY, provided a time?series of observations covering a wide range of hydrologic conditions. These conditions...

Schemel, Laurence E.; Brown, Randall L.; Bell, Norton W.
Attribution: Pacific
Salinity and temperature in South San Francisco Bay, California, at Dumbarton Bridge: results from the 1999-2002 water years and an overview of previous data; 2003; WRI; 2003-4005; Schemel, Laurence E.; Brown, Randall L.; Bell, Norton W.

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Year Published: 2002

Natural and management influences on freshwater inflows and salinity in the San Francisco Estuary at monthly to interannual scales

Understanding the processes controlling the physics, chemistry, and biology of the San Francisco Estuary and their relation to climate variability is complicated by the combined influence on freshwater inflows of natural variability and upstream management. To distinguish these influences, alterations of estuarine inflow due to major reservoirs...

Knowles, Noah
Attribution: Pacific

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Year Published: 2002

Natural and management influences on freshwater inflows and salinity in the San Francisco Estuary at monthly to interannual scales

Understanding the processes controlling the physics, chemistry, and biology of the San Francisco Estuary and their relation to climate variability is complicated by the combined influence on freshwater inflows of natural variability and upstream management. To distinguish these influences, alterations of estuarine inflow due to major reservoirs...

Knowles, Noah

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Year Published: 2002

Assimilation and retention of selenium and other trace elements from crustacean food by juvenile striped bass (Morone saxatilis)

 Estimates of the assimilation and retention of trace elements from food by fish are useful for linking toxicity with the biogeochemical cycling of these elements through aquatic food webs. Here we use pulse-chase radiotracer techniques to estimate the assimilation and retention of Se and four trace metals, Ag, Am, Zn, and Cd, by 43- and 88-d...

Baines, Stephen B.; Fisher, Nicholas S.; Stewart, Robin
Attribution: Water Resources, Pacific

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Year Published: 2002

Crustal structure of the coastal and marine San Francisco Bay region, California

As of the time of this writing, the San Francisco Bay region is home to about 6.8 million people, ranking fifth among population centers in the United States. Most of these people live on the coastal lands along San Francisco Bay, the Sacramento River delta, and the Pacific coast. The region straddles the tectonic boundary between the Pacific and...

Parsons, Thomas E.
Crustal structure of the coastal and marine San Francisco Bay region, California; 2002; PP; 1658; Edited by Parsons, Tom

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Year Published: 2002

Hydrodynamics of larval settlement: The influence of turbulent stress events at potential recruitment sites

We describe a laboratory investigation into the effect of turbulent hydrodynamic stresses on clam larvae in the settlement phase of the recruitment process. A two-component laser-Doppler anemometer (LDA) was used to measure time histories of the instantaneous turbulence structure at potential recruitment sites within reconstructed beds of the...

Crimaldi, John P.; Thompson, Janet K.; Rosman, Johanna H.; Lowe, Ryan J.; Koseff, Jeffrey R.

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Year Published: 2002

Tidal asymmetry and variability of bed shear stress and sediment bed flux at a site in San Francisco Bay, USA

The relationship between sediment bed flux and bed shear stress during a pair of field experiments in a partially stratified estuary is examined in this paper. Time series of flow velocity, vertical density profiles, and suspended sediment concentration were measured continuously throughout the water column and intensely within 1 meter of the bed...

Winterwerp, J.C.; Kranenburg, C.; Brennan, Matthew L.; Schoellhamer, David H.; Burau, Jon R.; Monismith, Stephen G.

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Year Published: 2002

Microphytobenthos potential productivity estimated in three tidal embayments of the San Francisco Bay system

In this paper we describe a three-step procedure to infer the spatial heterogeneity in microphytobenthos primary productivity at the scale of tidal estuaries and embayments. The first step involves local measurement of the carbon assimilation rate of benthic microalgae to determine the parameters of the photosynthesis-irradiance (P-E) curves (...

Guarini, Jean-Marc; Cloern, James E.; Edmunds, Jody L.; Gros, Philippe

Filter Total Items: 223
Image: American Avocet Feeding
April 21, 2009

American Avocet Feeding

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Western Sandpiper
April 21, 2009

Western Sandpiper

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: American Avocets
April 21, 2009

American Avocets

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: American Avocet
April 21, 2009

American Avocet

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Black-necked Stilt and American Avocet
April 18, 2009

Black-necked Stilt and American Avocet

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Dowitcher Sleeping
April 18, 2009

Dowitcher Sleeping

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Dowitcher Sleeping
April 18, 2009

Dowitcher Sleeping

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Obtaining a Dredge Sample
April 17, 2009

Obtaining a Dredge Sample

Barbara Martin about to collect a sediment sample for selenium analysis. Sample collected from the agricultural drain Trifolium 19 on the southwest side of the Salton Sea, CA.

Image: Snow Geese
November 19, 2008

Snow Geese

Birds found in and around the the Sonny Bono Refuge in southern Salton Sea, California.

Attribution: Pacific
Image: Great Egret and Snowy Egret
November 19, 2008

Great Egret and Snowy Egret

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Snow Geese
November 19, 2008

Snow Geese

Birds found in and around the the Sonny Bono Refuge in southern Salton Sea, California.

Attribution: Pacific
Image: Snow Geese
November 19, 2008

Snow Geese

Birds found in and around the the Sonny Bono Refuge in southern Salton Sea, California.

Attribution: Pacific

Nine USGS Science Centers are administered by the Pacific Regional office, which is headquartered in Sacramento, California.