Estimates of the suspended sediment reference concentration (Ca) and resuspension coefficient (γ0) from near-bottom observations on the California shelf

Continental Shelf Research
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Abstract

Near-bottom current and suspended sediment measurements above a sandy clayey silt bed on the California continental shelf are used to estimate the near-bed suspended sediment reference concentration, Ca, and the bed shear stress, τ0. A proposed model contends that Ca should be proportional to the normalized excess shear stress acting on the sediment grains and to the availability of erodible grains in the bed. The coefficient of proportionality (γ0) in this model is estimated for 10 erosion events and is found to range from about 1.5 × 10−5 to 3 × 10−4. Moreover, the estimated γ0 values appear to be inversely proportional to the excess bed shear stress. This result suggests that other factors, such as bed armoring and grain cohesion, inhibited the resuspension of particles at the relatively higher shear stresses.

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Publication type Article
Publication Subtype Journal Article
Title Estimates of the suspended sediment reference concentration (Ca) and resuspension coefficient (γ0) from near-bottom observations on the California shelf
Series title Continental Shelf Research
DOI 10.1016/0278-4343(89)90082-4
Volume 9
Issue 1
Year Published 1989
Language English
Publisher Elsevier
Contributing office(s) Pacific Coastal and Marine Science Center
Description 14 p.
First page 51
Last page 64
Country United States
State California
Other Geospatial California Shelf
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