The role of wave-induced density-driven fluid mud flows for cross-shelf transport on the Eel River continental shelf

Traykovski, Peter; Geyer, W. Rockwell; Irish, James D.; Lynch, James F.

doi:10.1016/s0278-4343(00)00071-6

Cited by 337 publications

(296 citation statements)

References 35 publications

Supporting

Mentioning

275

Contrasting

Order By: Relevance

“…Ng (2004) pointed out that the fluid mud that hardly moves under normal conditions may be mobilized to flow at an extremely high rate when waves are severely high. The wave-induced gravity-forced fluid mud flow was also reported in some literatures (Traykovski et al, 2000;Puig et al, 2003). These studies indicate that fluid mud may prone to move when waves and currents coexist.…”

Section: Introductionsupporting

confidence: 60%

A Bingham-plastic model for fluid mud transport under waves and currents

Liu

Huhe

2014

China Ocean Eng

View full text Add to dashboard Cite

show abstract

Section: Introductionsupporting

confidence: 60%

A Bingham-plastic model for fluid mud transport under waves and currents

Liu

Huhe

2014

China Ocean Eng

View full text Add to dashboard Cite

show abstract

“…The model shows a step-like structure where concentration is relatively uniform within the wave boundary layer, and exhibits a lutocline at the top of the wave boundary layer (Figure 7a). The ABS data at 1 Hz also show this type of lutocline with a step-like structure; however, the lutocline in the ABS data is wavy with time scales similar to the interfacial gravity waves shown in Traykovski et al (2000). The burst-averaged ABS concentration profile shown in Figure 7a results in a smoother lutocline gradient, because the fluctuations of the lutocline are averaged.…”

Section: Vertical One-dimensional Modeling Of Sediment Concentration mentioning

confidence: 73%

“…As a result, suspended sediment in concentration in Traykovski et al (2000) was assumed to be constant below the lutocline during periods of high acoustic attenuation. Here the lutocline is defined as the region of maximum concentration gradient at the top of the high concentration layer.…”

Section: Abs and Adcp Calibrations And Flux Estimatesmentioning

confidence: 99%

“…Typical lutocline gradients during the wave-supported turbidity flow events were around 10 g/l/cm. This technique produces lutocline heights that are similar to the 10 g/l thresholding method used in Traykovski et al (2000), and profiles with maximum concentrations less than 10 g/l usually did not have a lutocline as defined by the 2 g/l/cm gradient threshold. Using the gradient or the thresholding method on burst-averaged ABS profiles results in an overestimate of lutocline height since the lutocline is a wavy surface.…”

Section: Dynamics Of Wave-supported Turbidity Flowsmentioning

confidence: 99%

See 1 more Smart Citation

Observations and modeling of wave-supported sediment gravity flows on the Po prodelta and comparison to prior observations from the Eel shelf

Traykovski

Wiberg

Geyer

2007

Continental Shelf Research

178

195

View full text Add to dashboard Cite

Abstract:A mooring and tripod array was deployed from the fall of 2002 through the spring of 2003 on the Po prodelta to measure sediment transport processes associated with sediment delivered from the Po River. Observations on the prodelta revealed wave-supported gravity flows of high concentration mud suspensions that are dynamically and kinematically similar to those observed on the Eel shelf . Due to the dynamic similarity between the two sites, a simple one-dimensional across-shelf model with the appropriate bottom boundary condition was used to examine fluxes associated with this transport mechanism at both locations. To calculate the sediment concentrations associated with the wave-dominated and wave-current resuspension, a bottom boundary condition using a reference concentration was combined with an "active layer" formulation to limit the amount of sediment in suspension. Whereas the wave-supported gravity flow mechanism dominates the transport on the Eel shelf, on the Po prodelta flux due to this mechanism is equal in magnitude to transport due to wave resuspension and wind-forced mean currents in cross-shore direction. Southward transport due to wave resuspension and wind forced mean currents move an order of magnitude more sediment along-shore than the downslope flux associated wave-supported gravity flows.

show abstract

“…This has been shown to be the case for current velocities larger than 0.08 to 0.10 m s -1 . This is deemed satisfactory for deployments on the continental shelf, where current velocities of this magnitude are common (Ogston and Sternberg 1999;Traykovski et al 2000). One possible option for decreasing the current speed to initiate rotation would be to increase the size of the fins.…”

Section: Discussionmentioning

confidence: 99%

INSSECT—an instrumented platform for investigating floc properties close to the seabed

Mikkelsen

Milligan

Hill

et al. 2004

Limnology & Ocean Methods

View full text Add to dashboard Cite

A new type of tripod, INSSECT (IN situ Size and SEttling Column Tripod), designed for floc measurements in the shallow parts of the continental shelf, is described. INSSECT orientates itself into the current so that instrumentation on it faces upstream, thereby minimizing flow disturbance. The instrumentation includes a digital floc camera, a video settling column, a unique sediment trap designed for capturing flocs intact, a laser sizer, an optical backscatterance sensor, a compass and tilt meter, and a current meter. It is designed for relatively short deployments of up to 2 weeks and can be recovered, turned around, and redeployed rapidly. It was designed for use in semi-synoptic surveys of the spatial variation in floc properties such as size and settling velocity and the factors that influence them. The paper describes the various components of the INSSECT and presents selected results from the first deployments, demonstrating its ability to turn in the current and capture single flocs intact. Contrary to recent findings on the influence on settling columns on floc size, intercomparison between the video settling column and the digital floc camera reveals that the sizes are similar.

show abstract

The role of wave-induced density-driven fluid mud flows for cross-shelf transport on the Eel River continental shelf

Cited by 337 publications

References 35 publications

A Bingham-plastic model for fluid mud transport under waves and currents

A Bingham-plastic model for fluid mud transport under waves and currents

Observations and modeling of wave-supported sediment gravity flows on the Po prodelta and comparison to prior observations from the Eel shelf

INSSECT—an instrumented platform for investigating floc properties close to the seabed

Contact Info

Product

Resources

About