Regions L2 Landing Page Tabs
Proceedings of the Federal Interagency Workshop on Turbidity and other Sediment Surrogates, April 30-May 2, 2002, Reno, Nevada
No abstract available.Gray, John R.; Glysson, G. Douglas
A model for reconstructing the history of sediment deposition in San Pablo Bay Between 1856 and 1983Higgins, S.A.; Smith, R.E.; Fuller, C.C.; Jaffe, B.E.
Continuous, real-time optical measurement of DOC fluxes in a tidal wetlandDowning, B.; Wheeler, G.; Emerson, S.; Ganju, N.; Bergamaschi, B.
Tidal and vertical variability of floc characteristicsGanju, N.K.; Schoellhamer, D.H.
Quantifying the contributions of tidal wetlands to dissolved organic material in the San Francisco Estuary, California, USABergamaschi, B.A.; Downing, B.A; Wheeler, G.A; Schoellhamer, D.H.; Ganju, N.; Fram, M.S.; Erickson, D.E.; Kendall, C.; Bemis, B.E.; Stepanauskas, R.; Hollibaugh, J.T.; Fujii, R.
Comparison of salinity and temperature at continuous monitoring stations and nearby monthly measurement sites in San Francisco Bay
Salinity and temperature are crucial state variables affecting estuarine habitat an d, thus, are measured by various San Francisco Estuary programs. This article presents a comparison of salinity and temperature data collected at seven continuo us monitoring stations throughout San Francisco Bay (Figure 1) with data collected monthly by the US...Bergfeld, L.G.; Schoellhamer, D.H.
Preliminary analysis of cores from north San Francisco Bay, California
During the mid-to late-1800's, large quantities of tailings from hydraulic gold mining in the Sierra Nevada were deposited in San Francisco Bay (Gilbert, 1917; Jaffe et al., 1998; Capiella et al., 1999). This rapid deposition also choked river systems and deposited mercury-contaminated sediments in the rivers and Bay. Hydraulic mining was stopped...Allison, Dan; Hampton, Margaret; Jaffe, Bruce
Tidal wetland fluxes of dissolved organic carbon and sediment at Browns Island, California: initial evaluation
Carbon and sediment fluxes from tidal wetlands are of increasing concern in the Sacramento-San Joaquin River Delta (Delta), because of drinking water issues and habitat restoration efforts. Certain forms of dissolved organic carbon (DOC) react with disinfecting chemicals used to treat drinking water, to form disinfection byproducts (DBPs), some of...Ganju, N.K.; Bergamaschi, B.; Schoellhamer, D.H.
Preliminary assessment of DOC and THM precursor loads from a freshwater restored wetland, an agricultural field, and a tidal wetland in the Sacramento-San Joaquin River Delta
Water exported from the Sacramento-San Joaquin River Delta supplies drinking water to more than 22 million people in California. At certain times of the year, Delta waters contain relatively high concentrations of dissolved organic carbon (DOC) and bromide. During these times, chlorination of Delta water for drinking water disinfection will form...Fujii, R.; Bergamaschi, B.A.; Ganju, N.K.; Fleck, J.A.; Burow-Fogg, K.R.; Schoellhamer, D.; Deverel, S.J.
Interseasonal covariability of Sierra Nevada streamflow and San Francisco Bay salinity
The ecosystems of the San Francisco Bay estuary are influenced by the salinity of its waters, which in turn depends on flushing by freshwater inflows from the western slopes of the Sierra Nevada. Estimates of full-natural flows in eight major rivers that flush the Bay are analyzed here by extended empirical-orthogonal-function analyses to...Dettinger, Michael D.; Cayan, Daniel R.
A bathymetry system for measuring sediment accumulation in tidal marsh restoration projects
No abstract available.Takekawa, John Y.; Demers, S.; Woo, I.; Athearn, N.D.; Ganju, N.; Shellenbarger, G.G.; Schoellhamer, D.; Perry, W.M.
Assessing toxicant effects in a complex estuary: A case study of effects of silver on reproduction in the bivalve, Potamocorbula amurensis, in San Francisco Bay
Contaminant exposures in natural systems can be highly variable. This variability is superimposed upon cyclic variability in biological processes. Together, these factors can confound determination of contaminant effects. Long term, multidisciplined studies with high frequency sampling can be effective in overcoming such obstacles. While studying...Brown, C.L.; Parchaso, F.; Thompson, J.K.; Luoma, S.N.
Bluff erosion during the 2009–10 El Niño undermined the Great Highway guardrail at Ocean Beach, San Francisco, California. The shoreline eroded, on average, 55 meters that winter, leading to lane closures on the highway and an emergency $5-million revetment along the base of this bluff.
Bluff erosion during the 2009–10 El Niño undermined the Great Highway guardrail at the southern end of Ocean Beach, San Francisco, California. The shoreline eroded, on average, 55 meters that winter, leading to lane closures on the highway and an emergency $5-million revetment along the base of this bluff. Photo taken by Jeff Hansen, USGS, 20 January 2010.
Nine USGS Science Centers are administered by the Pacific Regional office, which is headquartered in Sacramento, California.