Journal ArticleDOI
Suspended-sediment transport in the surf zone: response to breaking waves
Reginald A. Beach,Richard W. Sternberg +1 more
- Vol. 16, Iss: 15, pp 1989-2003
TLDR
A field experiment designed to investigate the influence of wave breaking on suspended-sediment transport was conducted at Duck, NC, from 6 to 9 September 1985 as mentioned in this paper, where arrays of optical backscatter sensors, electromagnetic current meters and pressure sensors were deployed at five positions on a shore-normal transect that spanned the surf zone.Abstract:
A field experiment designed to investigate the influence of wave breaking on suspended-sediment transport was conducted at Duck, NC, from 6 to 9 September 1985. Arrays of optical backscatter sensors, electromagnetic current meters and pressure sensors were deployed at five positions on a shore-normal transect that spanned the surf zone. At each position measurements were made of cross-shore and longshore velocity, sea-surface fluctuations, and suspended sediment at five levels above the bed. Experimental data runs were conducted when incident swell waves ( Hs = 0.5m, T= 10–12s) broke (primarily plunging) within the experimental transect. This paper describes the spatial characteristics of the plunge-to-bore tranformation region and describes (1) the cross-shore variability of sediment resuspension, including the mean concentrations and mean suspended load; (2) the net longshore and cross-shore flux across the surf zone; (3) mean suspended-sediment profiles as a function of wave type, e.g. plunging, spilling and bore, and unbroken at four positions across the surf zone; and (4) discusses the relative contribution of each wave type to the net longshore and cross-shore sediment flux.read more
Citations
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Journal ArticleDOI
Suspended sediment transport mechanisms in high-energy swash
Tony Butt,Paul Russell +1 more
TL;DR: In this paper, the authors measured suspended sediment concentration at three heights above the bed, and cross-shore velocity at a single height using miniature optical backscatter sensors and a miniature electromagnetic current meter, from the swash-zone of a high-energy macrotidal dissipative beach.
Journal ArticleDOI
Intertidal beach change during storm conditions; Egmond, The Netherlands
TL;DR: In this paper, a field experiment was designed to measure suspended sediment transport in the swash and inner surf zone through successive tidal cycles in the intertidal zone at Egmond Beach, The Netherlands, using a stack of fiberoptic backscatter sensors (UFOBS-7).
Journal ArticleDOI
Sediment resuspension on beaches: response to breaking waves
George Voulgaris,Michael Collins +1 more
TL;DR: In this paper, the authors examined the mechanisms associated with sand resuspension in the surf zone and placed emphasis upon the relative contribution of bottom and surface generated turbulence in controlling suspended sediment concentration distribution.
Journal ArticleDOI
Cross-shore suspended sediment transport in the surf zone: a field-based parameterization
TL;DR: In this paper, a non-dimensional sediment flux index is formulated which describes the tendency towards net onshore or offshore transport and the strength of that tendency, and a formulation of suspended sediment transport across bars is obtained by linking the flux index with a parameterization of the sediment concentration/distribution in the water column.
Journal ArticleDOI
Breaker turbulence and sediment suspension in the surf zone
Troels Aagaard,Michael G. Hughes +1 more
TL;DR: In this paper, the relative role of coherent vortices (related to wave breaking) in suspended sediment dynamics was investigated using field measurements of fluid velocities and suspended sediment concentrations.
References
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Journal ArticleDOI
Energy saturation and phase speeds measured on a natural beach
TL;DR: In this article, the authors measured wave height and speed from 7m depth shoreward and found that wave heights in the inner surf zone are strongly depth independent: the envelope of the wave heights is described by H/sub rms/ = 0.42 h, and the depth dependence of the breaking wave height is related to the kinematic instability criterion.
Journal ArticleDOI
Dynamics of a high-energy dissipative surf zone
TL;DR: Vright et al. as mentioned in this paper measured pressure and horizontal current (u, v) time series at different positions across the inner 150 m of a wide (~500 m) surf zone of a microtidal high wave-energy beach.
The role of suspended sediment in shore-normal beach profile changes
TL;DR: In this article, field measurements of suspended sediment-transport were made across a dissipative surf zone during a storm and a correlation between high suspended mass in the water column and periods of onshore flow caused a net onshore transport of sediment even though the mean near-bottom flow was directed offshore.
Journal ArticleDOI
Kinematics of breaking waves and associated suspended sediment in the nearshore zone
TL;DR: In this article, the results of the Duck '85 nearshore experiments were collected as part of the Army Research Facility at Duck, North Carolina in September 1985 and the data set includes time series measurements of sea surface elevation, currents, and suspended sediment concentrations located at five positions across the surf zone.
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