Characteristics and dynamics of multiple intertidalbars, north Lincolnshire, England
Coastal dynamics ; Coastal environment ; Coastal geomorphology ; Digital elevation model ; England ; Interannual variability ; Intertidal zone ; Lincolnshire ; United Kingdom
The objectives of this paper are : to examine the geographic distribution of multiple intertidalbars along the coastline of England and Wales to indicate the environmental conditions (geomorphologic setting, waves, tides) that characterize
such morphology; to describe the longshore and cross-shore variability of intertidalbar geometry; and to gain insight into inter- and intra-annual intertidalbar dynamics.
Morphodynamics of intertidalbars in wave-dominated coastal settings - a review
Beach ; Coastal dynamics ; Coastal environment ; Earth surface processes ; Intertidal zone ; Sand bar ; Sediment transport ; Tide ; Wave
The aims of this review are to identify the dominant morphodynamic processes governing intertidalbar systems and provide a conceptual framework with which these bars can be further investigated. It is the dominant importance of tidal water level
variations and wave processes in shallow water depths (swash and surf zone bores), rather than wave height variability and deeper water wave processes (breaking and shoaling waves), that constitutes the main difference between intertidal and subtidal bar
Coastal dynamics ; Coastal environment ; Denmark ; Intertidal zone ; Sand bar ; Sediment transport ; Storm ; Suspended load
This paper examines the processes responsible for the morphodynamics of an intertidal swash bar at Skallingen, Denmark, during 7 successive storms. The contributions of gravity waves, infragravity waves and mean currents to the cross-shore suspended
sediment transport are systematically described and related to the morphological response of the intertidal swash bars at Skallingen.
Short-term intertidalbar mobility on a ridge-and-runnel beach, Merlimont, northern France
Coastal dynamics ; Coastal environment ; Coastal sedimentation ; Digital elevation model ; Earth surface processes ; France ; Intertidal zone ; Longshore current ; Nord-Pas-de-Calais ; Sand bar ; Sediment transport ; Topography
Digital elevation models and topography profiles of a beach with intertidalbar and through (ridge-and-runnel) morphology in Merlimont, near Somme estuary, were analysed in order to assess patterns of cross-shore and longshore intertidalbar
mobility. The beach exhibited a pronounced dual bar-trough system that showed cross-shore stationarity. The bars and throughs were, however, characterized by significant longshore advection of sand under the influence of suspension by waves and transport
Dynamics of intertidal drainage channels on a multi-barred macrotidal beach
Atlantic Ocean ; Beach ; Belgium ; Channel ; Coastal dynamics ; Coastal environment ; Drainage ; Intertidal zone ; North Sea ; Sand bar ; Tide ; Wave
The intertidal drainage channels on a macrotidal bar-trough (ridge-and-runnel) beach, the Leffrinckouke beach in the southern North Sea, were monitored during a 17-day survey. This beach is characterized by 2 intertidal drainage channel types : type
1, dominantly longshore systems essentially limited to the wide intertidal zone; smaller and ephemeral type 2, dominantly cross-shore systems incising bars during spring tides. Channel mobility and impact on beach morphology are expected to increase
The influence of intertidalbar-trough morphology on sediment transport on macrotidal beaches, northern France
Beach ; Coastal environment ; Coastal geomorphology ; France ; Intertidalbar ; Intertidal zone ; Nord-Pas-de-Calais ; Sand ; Sediment transport ; Trough
Arena ; Francia ; Geomorfología litoral ; Litoral ; Playa litoral ; Transporte sedimentario ; Zona intertidal
trapping, the AA. examine the possible role played by intertidalbar and through morphology on longshore and onshore-directed sand transport. Results show that intertidalbars are responsible for significant wave energy dissipation leading to a decrease
The aim of this paper is to present the results of sediment transport measurements, coastal hydrodynamics and beach morphological surveys carried out on 3 sandy barred macrotidal beaches of Northern France (Zuydcoote, Wissant, Hardelot). Using sand
of sand transport towards the upper beach. Sediment transport appeared to be substantially higher on the bars than within the troughs due to wave breaking processes that are responsible for intense sand remobilization. The comparison of onshore sediment
In this study, an intertidalbar and trough system on the beach of Noordwijk was monitored over a 15-month period in order to examine the daily to seasonal sequential cross-shore behaviour and to establish which conditions force or interrupt
this cyclic bar behaviour. The beach morphology (bars and troughs) was classified from low-tide ARGUS video images based on surface composition. From the classified images, time series of the landward boundary of the bar and the trough were extracted. The time
Location and height of intertidalbars on macrotidal ridge and runnel beaches
Coastal dynamics ; Coastal environment ; Coastal geomorphology ; Comparative study ; Earth surface processes ; England ; France ; Intertidal zone ; Nord-Pas-de-Calais ; United Kingdom
The principal aim of this paper is to investigate whether the ridges are preferentially located on the intertidal profile where the water level is stationary for the longest time and whether the height of the ridges increases across the intertidal
. It is suggested that the ridges are the result of a combination of swash and surf zone processes acting across the intertidal zone.
Coastal dynamics ; Coastal environment ; Intertidal zone ; Netherlands (The) ; Sediment transport
The hydrodynamics and the suspended sediment fluxes are studied in detail at the crest and on the seaward slope of a swash bar on the intertidal beach. The small scale morphological behaviour of the beach and the meso scale morphological behaviour
of the nearshore zone is focused on the generation and the migration of bars, and on the parametrization of the morphodynamics. - (AGD)
Dynamics of multiple intertidalbars over semi-diurnal and lunar tidal cycles, North Lincolnshire, England
Coastal dynamics ; Coastal environment ; Earth surface processes ; England ; Intertidalbar ; Intertidal zone ; Lincolnshire ; Numerical model ; United Kingdom
This study describes the morphodynamics of multiple intertidalbars in North Lincolnshire during single and lunar tidal cycles under 2 contrasting conditions : first when significant wave height was
frequently exceeded 1 m. The relative importance of swash, surf and shoaling processes in determining morphological change was examined using detailed field observations and a numerical model. The results strongly suggest that changes in the intertidal
morphology are accomplished by surf zone processes rather than by shoaling wave or swash processes. It was found, however, that swash action may induce a significant amount of local morphological change when the high tide mark is located on the upper bar
, making this process important for bar morphodynamics.
Hydrodynamics, sediment transport, and daily morphological development of a bar-beach system
Coastal dynamics ; Coastal environment ; Coastal geomorphology ; Hydrodynamics ; Intertidal zone ; Netherlands (The) ; Sand bar ; Sediment transport
The aim of this research is the increase of the knowledge of the behaviour of nearshore breaker bars on the short to medium time scale (days to weeks) and to reveal the hydrodynamic and sediment transport processes underlying this behaviour
. The research focuses on processes associated with the transformation and breaking of high-frequency wind-waves near the inner of the two nearshore breaker bars of Egmond aan Zee (Central Dutch Coast). - (AGD)
and subtidal alongshore bar rhythmicities confirmed the influence of the subtidal morphology on the intertidalbar system.
The aim of this paper is to investigate the spatial and temporal dynamics of intertidal rip channels and their relation with offshore wave characteristics and with subtidal rip channel characteristics on a microtidal, storm-dominated beach. A 15
-month data set of daily time-averaged video images (Argus) has been analyzed to describe the spatial and temporal variability of the rip channels on a multiple-barred coast at Noordwijk aan Zee, The Netherlands. The spatial and temporal variability
of the number of rip channels, spacing and migration rates demonstrated the daily behaviour of the intertidal rip channels and revealed a coupling with hydrodynamic parameters as well as subtidal rip channel characteristics. Coupling of the intertidal
Coastal dynamics ; Coastal environment ; Denmark ; Earth surface processes ; Intertidal zone ; North Sea ; Sand bar ; Sediment transport
The formation of an inner nearshore bar was observed during a 19-hour high-energy event at the sandy beach of Vejers, Denmark. Suspended sediment transport and cross-shore sediment transport gradients were obtained from a cross-shore array
Swash bar morphodynamics in the Danish Wadden Sea : sand bed oscillations and suspended sediment flux during an accretionary phase of the foreshore cycle
Coastal dynamics ; Coastal environment ; Denmark ; Dune ; Intertidal zone ; North Sea ; Sand bar ; Sediment transport ; Suspended load ; Wave ; Wind speed
In this paper, small-scale accretion/erosion cycles are documented in association with the vertical and horizontal translation of a swash bar during a major accretionary phase of the beach cycle. The local hydrodynamics responsible for sand
Wave flume experiments on the formation of longshore bars produced by breaking waves
Coastal dynamics ; Coastal environment ; Experimentation ; Japan ; Model ; Sand bar ; Vortex
Mechanisms and processes of longshore bar formation were investigated in connection with vortices induced by breaking waves in the laboratory. Four kinds of wave-flume experiments were conducted using a two-video-camera system to examine
the vortices and bar formation in detail. Four process models on bar formation are constructed based on the action of vortices: they are models for break-point single bar, inshore single bar, successive multiple bars, and simultaneous multiple bars
. The occurrence condition for these four types of bars can be quantitatively determined.
rates, substantial swash overtopping of the berm, and low infiltration rates. Despite the onshore migration of intertidalbars and berm formation, no net foreshore accretion took place during the field campaign. This was largely due to the formation
of rip channels with strong rip currents cutting through the intertidalbars and the berm, which acted as a sediment drain in the profile.
Numerous AA. utilized the term beach ridge for active and relict, usually wave-built supratidal and /or intertidal forms. The term was applied also to submerged, landward-shifting, eventually stranded bars. A consistent redefinition of the term