Trends in the Sediment Yield of the Sacramento River, California, 1957 - 2001

Human activities within a watershed, such as agriculture, urbanization, and dam building, may affect the sediment yield from the watershed. Because the equilibrium geomorphic form of an estuary is dependent in part on the sediment supply from the watershed, anthropogenic activities within the watershed have the potential to affect estuary geomorphology. The Sacramento River drains the northern half of California’s Central Valley and is the primary source of sediment to San Francisco Bay. In this paper, it is shown that the delivery of suspended-sediment from the Sacramento River to San Francisco Bay has decreased by about one-half during the period 1957 to 2001. Many factors may be contributing to the trend in sediment yield, including the depletion of erodible sediment from hydraulic mining in the late 1800s, trapping of sediment in reservoirs, riverbank protection, altered land-uses (such as agriculture, grazing, urbanization, and logging), and levees. This finding has implications for planned tidal wetland restoration activities around San Francisco Bay, where an adequate sediment supply will be needed to build subsided areas to elevations typical of tidal wetlands as well as to keep pace with projected sea-level rise. In a broader context, the study underscores the need to address anthropogenic impacts on watershed sediment yield when considering actions such as restoration within downstream depositional areas.

[1]  J. Brice.  Lateral migration of the Middle Sacramento River, California , 1977 .

[2]  James E. Cloern,et al.  Turbidity as a control on phytoplankton biomass and productivity in estuaries , 1987 .

[3]  K. Kuivila,et al.  Distributions of pesticides and organic contaminants between water and suspended sediment, San Francisco Bay, California , 1993 .

[4]  J. Donoghue.  Trends in Chesapeake Bay Sedimentation Rates during the Late Holocene , 1990, Quaternary Research.

[5]  J. Davis,et al.  Estimates of suspended-sediment flux entering San Francisco Bay from the Sacramento and San Joaquin Delta , 2002 .

[6]  K. Edelvang,et al.  The Temporal Variation of Flocs and Fecal Pellets in a Tidal Channel , 1997 .

[7]  P. Ritson,et al.  Metal contamination in San Francisco Bay waters: Historic perturbations, contemporary concentrations, and future considerations , 1996 .

[8]  R. Walters.  Low-frequency variations in sea level and currents in south San Francisco Bay , 1982 .

[9]  D. S. Harwood,et al.  Late Cenozoic tectonism of the Sacramento Valley, California , 1987 .

[10]  J. Xu.  Wave-current bottom shear stresses and sediment resuspension in Cleveland Bay, Australia, by Lou and Ridd: Comments , 1998 .

[11]  Janet K. Thompson,et al.  Time scales of change in the San Francisco Bay benthos , 1985, Hydrobiologia.

[12]  James E. Cloern,et al.  Temporal dynamics of estuarine phytoplankton: A case study of San Francisco Bay , 1985, Hydrobiologia.

[13]  David H. Schoellhamer,et al.  Variability of suspended-sediment concentration at tidal to annual time scales in San Francisco Bay, USA , 2002 .

[14]  David H. Schoellhamer,et al.  Sediment resuspension mechanisms in old Tampa Bay, Florida , 1995 .

[15]  D. Weir,et al.  The role of wind in generating turbidity maxima in the Tay Estuary , 1987 .

[16]  D. Schoellhamer.  Time Series of Trace Element Concentrations Calculated from Time Series of Suspended Solid Concentrations and RMP Water Samples , 1996 .

[17]  D. Schoellhamer,et al.  Hydrodynamic and Suspended-Solids Concentration Measurements in Suisun Bay, California, 1995 , 2001 .

[18]  R. E. Smith,et al.  Environmental setting of San Francisco Bay , 1985, Hydrobiologia.

[19]  R. Uncles.  Estuarine Physical Processes Research: Some Recent Studies and Progress , 2002 .

[20]  R. Busch,et al.  Sediment transport in the Feather River, Lake Oroville to Yuba City, California , 1978 .

[21]  George Porterfield,et al.  Sediment transport of streams tributary to San Francisco, San Pablo, and Suisun Bays, California, 1909-66 , 1980 .

[22]  J. Cloern,et al.  Changes in production and respiration during a spring phytoplankton bloom in San Francisco Bay, California, USA: Implications for net ecosystem metabolism , 1998 .

[23]  Peter V. Ridd,et al.  Wave-current bottom shear stresses and sediment resuspension in Cleveland Bay, Australia , 1996 .

[24]  T. Conomos.  San Francisco Bay - the urbanized estuary , 1982 .

[25]  K. Bryan.  Geology and ground-water resources of Sacramento Valley, California , 1923 .

[26]  A. Zimmerman,et al.  Sediment geochemical records of eutrophication in the mesohaline Chesapeake Bay , 2002 .

[27]  R. Dinehart,et al.  Bedform movement recorded by sequential single-beam surveys in tidal rivers , 2002 .

[28]  N. Snyder,et al.  Bathymetric and geophysical surveys of Englebright Lake, Yuba-Nevada Counties, California , 2003 .

[29]  L. James.  Incision and morphologic evolution of an alluvial channel recovering from hydraulic mining sediment , 1991 .

[30]  D. Schoellhamer,et al.  Suspended-solids flux at a shallow-water site in south San Francisco Bay, California , 1996 .

[31]  J. V. Beusekom,et al.  Wind- and tide-induced resuspension of sediment and microphytobenthos from tidal flats in the Ems estuary , 1995 .

[32]  D. Helsel,et al.  Statistical methods in water resources , 2020, Techniques and Methods.

[33]  R. Oltmann.  Sediment inflow to the Sacramento-San Joaquin Delta and the San Francisco Bay , 1999 .

[34]  Lawrence H. Smith.  A review of circulation and mixing studies of San Francisco Bay, California , 1987 .

[35]  Vernon W. Norman,et al.  Field methods for measurement of fluvial sediment , 1970 .

[36]  Robert G. Dean,et al.  Water wave mechanics for engineers and scientists , 1983 .

[37]  R. H. Meade.  Sources, Sinks, and Storage of River Sediment in the Atlantic Drainage of the United States , 1982, The Journal of Geology.

[38]  C. H. Hembree,et al.  Computations of Total Sediment Discharge, Niobrara River near Cody, Nebraska , 1954, Science.