The stability of marine sediments at a tidal basin in San Francisco Bay amended with activated carbon for sequestration of organic contaminants

Zimmerman, John R.; Bricker, Jeremy D.; Jones, Craig; Dacunto, Philip J.; Street, Robert L.; Luthy, Richard G.

doi:10.1016/j.watres.2008.05.023

Cited by 16 publications

(18 citation statements)

References 21 publications

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“…Still, critical shear stress values show a high variability over space as well as over time [ Dickhudt et al , 2009]. Critical shear stress values around 0.7 Pa have been reported for South Bay sediments close to San Francisco [ Zimmerman et al , 2008]. However, that study was conducted in the laboratory after the sediments were mixed.…”

Section: Resultsmentioning

confidence: 99%

Wind‐enhanced resuspension in the shallow waters of South San Francisco Bay: Mechanisms and potential implications for cohesive sediment transport

et al. 2010

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[1] We investigated the driving forces of sediment dynamics at the shoals in South San Francisco Bay. Two stations were deployed along a line perpendicular to a 14 m deep channel, 1000 and 2000 m from the middle of the channel. Station depths were 2.59 and 2.19 m below mean lower low water, respectively. We used acoustic ). Most resuspension events occurred during flood tides that followed wave events during low water. Although wave motions are able to resuspend sediment into the wave boundary layer at low tide, the observed large increases in sediment fluxes are due to the nonlinear interaction of wind waves and the tidal currents.

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Section: Resultsmentioning

confidence: 99%

Wind‐enhanced resuspension in the shallow waters of South San Francisco Bay: Mechanisms and potential implications for cohesive sediment transport

et al. 2010

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“…The identified parameters for the linear bed erosion model were similar to those observed by other studies of cohesive sediments. Zimmerman et al () measured a critical shear stress τ crit of 1 × 10 −1 Pa at a similar field site in South San Francisco Bay using an erosion chamber. This value compared well with τ crit observed in our study (1.1 × 10 −1 Pa in spring and 6.77 × 10 −2 Pa in fall).…”

Section: Discussionmentioning

confidence: 99%

“…are used like the linear erosion model

E = M (τ_{normalb} - τ_{crit}),

which is based on a constant critical shear stress throughout the sediment profile (Type II erosion) (Sanford and Maa ). Another approach assumes a nonlinear relationship while not considering τ crit explicitly (Sanford and Halka , Zimmerman et al )

E = M {(τ_{normalb})}^{k}

…”

mentioning

confidence: 99%

Model-based interpretation of sediment concentration and vertical flux measurements in a shallow estuarine environment

et al. 2015

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A one-dimensional numerical model describing tidally varying vertical mixing and settling was used to interpret sediment concentrations and vertical fluxes observed in the shoals of South San Francisco Bay by two acoustic Doppler velocimeters (ADVs) at elevations of 0.36 m and 0.72 m above bed. Measured sediment concentrations changed by up to 100 g m 23 over the semidiurnal tidal cycle. These dynamics were dominated by local resuspension and settling. Multiple particle class models suggested the existence of a class with fast settling velocities (w s of 9.0 3 10 24 m s 21 in spring and 5.8 3 10 24 m s 21 in fall) and a slowly settling particle fraction (w s of <1 3 10 27 m s 21 in spring and 1.4 3 10 25 m s 21 in fall). Modeled concentrations of slowly settling particles at 0.36 m were as high as 20 g m 23 during fall and varied with the springneap cycle while fine sediment concentrations in spring were constant around 5 g m 23 . Analysis of in situ water column floc size distributions suggested that floc properties in the lower part of the water column were most likely governed by particle-size distribution on the bed and not by coagulation, validating our multiple particle size approach. A comparison of different sediment bed models with respect to model performance, sensitivity, and identifiability suggested that the use of a sediment erosion model linear in bottom shear stress s b (E 5 M (s b 2 s c )) was the most appropriate choice to describe the field observations when the critical shear stress s c and the proportionality factor M were kept constant. *Correspondence: andreas.brand@eawag.ch 463 LIMNOLOGY and OCEANOGRAPHY

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“…With particular relevance to our study, the sediment amendment with activated carbon in the intertidal zone at Hunters Point, San Francisco has been implemented with positive results [55,56]. More importantly, the incorporation of activated carbon into the intertidal sediments did not appear to increase the erosion rates of amended sediments [57], indicating that the added BC will likely remain in place. However, there are also concerns over the secondary release of contaminants from the sediments to water.…”

Section: Discussionmentioning

confidence: 84%

Abiotic reduction of trifluralin and pendimethalin by sulfides in black-carbon-amended coastal sediments

Gong

Liu

Xia

et al. 2016

Journal of Hazardous Materials

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The stability of marine sediments at a tidal basin in San Francisco Bay amended with activated carbon for sequestration of organic contaminants

Cited by 16 publications

References 21 publications

Wind‐enhanced resuspension in the shallow waters of South San Francisco Bay: Mechanisms and potential implications for cohesive sediment transport

Wind‐enhanced resuspension in the shallow waters of South San Francisco Bay: Mechanisms and potential implications for cohesive sediment transport

Model-based interpretation of sediment concentration and vertical flux measurements in a shallow estuarine environment

Abiotic reduction of trifluralin and pendimethalin by sulfides in black-carbon-amended coastal sediments

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