Tidal Inlet Current — Ocean Wave Interaction

Hales, Lyndell Z.; Herbich, John B.

doi:10.1061/9780872620490.039

Cited by 6 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experiments at a larger, more physically realistic scale, were undertaken by Hales and Herbich [1972] to study the transformation of long‐crested gravity waves propagating collinearly against a free turbulent jet‐like current flowing through the narrow inlet of a tidal bay in a three‐dimensional wave basin. Relationships for the change in wave height and length along the axis of the inlet as a function of current strength were formed, essentially considering the two‐dimensional problem of waves propagating on an increasingly adverse current.…”

Section: Physical Modelingmentioning

confidence: 99%

Gravity waves interacting with a narrow jet‐like current

MacIver¹,

Simons²,

Thomas³

2006

J. Geophys. Res.

View full text Add to dashboard Cite

[1] A unique experiment to investigate the transformation of near-linear gravity waves propagating across a narrow horizontally sheared jet-like current, typical of those found in the nearshore, coastal, and ocean regions, is described. A single wave condition was studied, propagating across the current orthogonally and at oblique incidence in both a following and opposing sense to the current. The length scale of the current shear layers was comparable to the incident wavelength. The experiment is the first attempt to assess the kinematics and dynamics of the interaction of regular waves and currents in three dimensions at a physically realistic scale. The resulting data set provides direct quantitative measurements of the spatial variation of the primary flow variables. Negligible reflection of the incident wave at the current shear layers was observed. Typical refraction behavior was observed: A following wave is refracted to a more current-parallel direction with an increased wavelength and reduced wave height as it moves onto the current, while the opposing wave becomes more current normal with a shortened wavelength and enhanced wave height. The experimental data are compared with predictions of a wave ray model, assuming a depth-averaged current and slowly varying horizontal shear, and a new model that incorporates the influence of vertical shear.

show abstract

Section: Physical Modelingmentioning

confidence: 99%

Gravity waves interacting with a narrow jet‐like current

MacIver¹,

Simons²,

Thomas³

2006

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…These wave bores enhance the flood-tidal currents but retard the ebb-tidal currents, contributing to stronger landward flow. Several investigators (Hales and Herbich 1972;Oertel 1972;Hubbard et al 1977;and FitzGerald and Levin 1981) have also shown that wave action and sand suspension are stronger on the swash platform during a flooding tide than during the ebb cycle.…”

Section: Sediment-transport Patternsmentioning

confidence: 99%

Interactions between the Ebb-Tidal Delta and Landward Shoreline: Price Inlet, South Carolina

FitzGerald¹

1984

SEPM JSR

View full text Add to dashboard Cite

Patterns of erosion and deposition along the shoreline of Price Inlet, South Carolina, are strongly influenced by ebb-tidal delta processes. The ebb delta goes through cycles of growth and decay (15-20% change in volume) which last from 4 to 7 years. In the growth phase, large intertidal bar complexes are formed on both sides of the main ebb channel by the coalescence of landward-migrating swash bars. During this stage, waves refracting around the southern bar complex produce a reversal in the longshore-transport direction on the downdrifl shoreline. This results in little sediment escaping the inlet and delta system. The sand-trapping mechanism ceases and the delta reduces in volume when the bar complexes migrate onshore and attach to the beach.The inlet shoreline also goes through cycles of 7-to 42-years duration in which its offset configuration changes. The shift in shoreline alignment is controlled by the orientation of the main ebb channel and the resulting ebb-tidal delta morphology. When the inlet has a downdrifl, offset configuration, the ebbtidal delta is skewed along the updrift shoreline. In this position bar complexes preferentially accrete along the ulxlrifl beach causing a progradation of the shoreline. At the same time, the downdrift shoreline erodes due to little sediment bypassing the inlet. This pattern of sedimentation eventually produces an updrift, offset inlet. The erosional-depositional processes are reversed when the ebb flow in the channel thalweg is deflected off the prograding updrift, inlet shoreline. This causes a clockwise rotation of the main ebb channel and a shift in the ebb delta to a position along the downdfift shoreline. In this configuration the updrift shoreline erodes and the downdrift shoreline aecretes. This study documents the close relationship that exists at Price Inlet, South Carolina, between the ebb-tidal delta and landward shoreline. Evidence is presented to show that this relationship may hold for other mixedenergy tidal inlets as well.

show abstract

“…Other cases in which small-scale currents exist include thin shear layers, e.g., where a current goes straight past a headland, or similar circumstances where a current comes out of an inlet. Photographs in Hales and Herbich (1972) show a jetlike current from an inlet with complex wave formations.…”

mentioning

confidence: 99%

Interaction of waves and currents / by D. Howell Peregrine and Ivar G. Jonsson ; prepared for U.S. Army, Corps of Engineers, Coastal Engineering Research Center.

Galvin¹,

Jonsson²,

Peregrine³

1983

View full text Add to dashboard Cite

This report reviews wave-current interaction, a phenomenon which may affect wave height and wave direction in unexpected ways. Wave-current interaction has received relatively more attention from Europeans than from Americans because of the greater importance of tides to countries bordering the North Sea. A comprehensive review of the literature, much of it foreign, will increase awareness among U.S. engineers of the important aspects of wave-current interaction. An annotated bibliography on this subject is provided by Peregrine, Jonsson, and Galvin (1983). The work was carried out under the U.S. Army Coastal Engineering Research Center's (CERC) Waves at Entrances work unit. Harbor Entrances and Coastal Channels Program, Coastal Engineering Area of Civil Works Research and Development. The report was prepared by D. Howell Peregrine of the University of Bristol, England, with assistance from Ivar G.

show abstract

Tidal Inlet Current — Ocean Wave Interaction

Cited by 6 publications

References 9 publications

Gravity waves interacting with a narrow jet‐like current

Gravity waves interacting with a narrow jet‐like current

Interactions between the Ebb-Tidal Delta and Landward Shoreline: Price Inlet, South Carolina

Interaction of waves and currents / by D. Howell Peregrine and Ivar G. Jonsson ; prepared for U.S. Army, Corps of Engineers, Coastal Engineering Research Center.

Contact Info

Product

Resources

About