Wave Action in Shore Platform Formation

1951 ◽  
Vol 88 (1) ◽  
pp. 41-49 ◽  
Author(s):  
A. B. Edwards
Keyword(s):  
High Tide ◽  
Water Layer ◽  
Wave Action ◽  
Southern Coast ◽  
Shore Platform ◽  
Storm Waves ◽  
Tide Level ◽  
Storm Wave ◽  
Wave Erosion ◽  
Shore Platforms

AbstractErosion of headlands along the southern coast of Victoria results chiefly from the attack of storm waves, and is concentrated above a defined level, marked by certain level shore platforms, whose surfaces are at about high tide level. These platforms are initiated and maintained by storm wave erosion. Their surfaces undergo planation and lowering, chiefly by the scouring action of waves of translation, but increasingly by water-layer weathering as the platforms age and widen.

NODAL CYCLE, QUASI-LUNAR CYCLE, AND FLORIDA CURRENT INFLUENCES ON HIGH TIDE LEVEL IN MIAMI FLORIDA

2020 ◽  
Author(s):  
Martina Rogers ◽  
◽  
Michael C. Sukop ◽  
Jayantha Obeysekera ◽  
Florence George ◽  
...  
Keyword(s):  
High Tide ◽  
Lunar Cycle ◽  
Florida Current ◽  
Tide Level

scholarly journals Volcano-air-sea interactions in a coastal tuff ring, Jeju Island, Korea

2021 ◽  
pp. SP520-2021-52
Author(s):  
Young Kwan Sohn ◽  
Chanwoo Sohn ◽  
Woo Seok Yoon ◽  
Jong Ok Jeong ◽  
Seok-Hoon Yoon ◽  
...  
Keyword(s):  
Water Saturation ◽  
Chemical Change ◽  
Sudden Change ◽  
Wave Action ◽  
Jeju Island ◽  
Tuff Ring ◽  
Before And After ◽  
Storm Wave ◽  
External Water ◽  
Storm Surge Event

AbstractThe Holocene tuff ring of Songaksan, Jeju Island, Korea, is intercalated with wave-worked deposits at the base and in the middle parts of the tuff sequence, which are interpreted to have resulted from fair-weather wave action at the beginning of the eruption and storm wave action during a storm surge event in the middle of the eruption, respectively. The tuff ring is overlain by another marine volcaniclastic formation, suggesting erosion and reworking by marine processes because of post-eruption changes of the sea level. Dramatic changes of the chemistry, accidental componentry, and ash-accretion texture of the pyroclasts are also observed between the tuff beds deposited before and after the storm invasion. The ascent of a new magma batch, related to the chemical change, could not be linked with either the Earth and ocean tides or the meteorological event. However, the changes of the pyroclasts texture suggest a sudden change of the diatreme fill from water-undersaturated to supersaturated because of an increased supply of external water into the diatreme. Heavy rainfall associated with the storm is inferred to have changed the water saturation in the diatreme. Songaksan demonstrates that there was intimate interaction between the volcano and the environment.

Behavioural adaptation of the gastropod Nerita polita L. on different shores at Aldabra Atoll

1982 ◽  
Vol 215 (1201) ◽  
pp. 451-467 ◽  
Keyword(s):  
Indian Ocean ◽  
High Tide ◽  
Wave Action ◽  
Short Term ◽  
Behavioural Adaptation ◽  
Intertidal Gastropod

On different shores of Aldabra Atoll, Indian Ocean, the intertidal gastropod Nerita polita L. is mostly active during nocturnal low tide and digs into the sand during high tide and diurnal low tide. Nevertheless, the species shows a plasticity in both temporal (exploitation of the emersion time during nocturnal low tide) and spatial (short-term move­ments) components of its activity. The study showed that snails inhabiting different shores are behaviourally adapted to the actual morphology of the coast and its exposure to wave action.

scholarly journals Palaeoenvironmental dynamics of Holocene shoreface bryoliths from the southern coast of Brazil

The Holocene ◽  
2019 ◽  
Vol 29 (4) ◽  
pp. 662-675 ◽  
Author(s):  
Frederico Tapajós de Souza Tâmega ◽  
Paula Spotorno-Oliveira ◽  
Paula Dentzien-Dias ◽  
Francisco Sekiguchi Buchmann ◽  
Leandro Manzoni Vieira ◽  
...  
Keyword(s):  
Human Disturbance ◽  
Rio Grande ◽  
Coralline Algae ◽  
Southern Coast ◽  
Rio Grande Do Sul ◽  
Benthic Habitats ◽  
Free Living ◽  
Storm Waves ◽  
Water Carbonate ◽  
Shallow Water Carbonate

Beds of free-living coated nodules (coralline algae, bryozoans, acervulinid foraminifera) create shallow-water carbonate biogenic benthic habitats, which are sensitive to human disturbance and slow to recover. Holocene bryoliths, ranging from sub-spheroidal, sub-discoidal to sub-ellipsoidal in shape, were found scattered in the foredunes in ca. 30-km stretch along the Hermenegildo and Concheiros do Albardão beaches on the southernmost coast of Brazil (Santa Vitória do Palmar municipality, Rio Grande do Sul State). The dominating bryozoan species forming the bryolith is Biflustra holocenica Vieira, Spotorno-Oliveira and Tâmega sp. nov. The inner bryolith arrangement, generally asymmetrical, shows multilamellar and circumrotatory growth of colonies that envelop the bivalve Ostrea puelchana. Bryozoans and subordinate corals characterize the outer bryolith surfaces. The ichnogenera Gastrochaenolites (made by the boring bivalve Lithophaga patagonica) and Caulostrepsis occur throughout the bryoliths, from the inner part up to the outer surface. The studied bryoliths, originated in a shoreface setting at ca. 7910–7620 cal. yr BP and during subsequent storm waves, were resedimented onto the foreshore and foredunes (to ca. 5700 cal. yr BP) where the bryoliths were finally fossilized.

scholarly journals A COMPARISON OF NATURE WAVES AND MODEL WAVES WITH SPECIAL REFERENCE TO WAVE GROUPING

1980 ◽  
Vol 1 (17) ◽  
pp. 177 ◽  
Author(s):  
Hans F. Burcharth
Keyword(s):  
Phase Distribution ◽  
Random Phase ◽  
Power Spectra ◽  
Height Distribution ◽  
Wave Group ◽  
Storm Waves ◽  
Wave Height Distribution ◽  
Storm Wave ◽  
Wave Heights ◽  
The Impact

This paper represents a comparative analysis of the occurrence of wave grouping in field storm waves and laboratory waves with similar power spectra and wave height distribution. Two wave patterns - runs of waves and jumps in wave heights - which have significant influence on the impact on coastal structures were included in the analysis of storm wave records off the coasts of Cornwall, U.K. and Jutland, Denmark. Two different laboratory wave generator systems, based on random phase distribution of component waves, were used. Within the limitations given by the relatively small number of analysed records it is shown that wave group statistics can be satisfactorily reproduced by random phase generators that are not based on a limited number of component waves, but for example based on filtering of white noise. It is also shown that the statistics of large waves and wave groups containing large waves depend on whether the waves are defined from zero-upcrossings or zero-downcrossings. Although very similar seas were chosen for the analysis it was found that significant differences in the wave group statistics from the two locations existed. Also a considerable scatter in the wave group statistics throughout the storms was found.

scholarly journals Storm Surge Inundation Analysis with Consideration of Building Shape and Layout at Ise Bay by Maximum Potential Typhoon

2020 ◽  
Vol 8 (12) ◽  
pp. 1024
Author(s):  
Masaki Nimura ◽  
Shuzo Nishida ◽  
Koji Kawasaki ◽  
Tomokazu Murakami ◽  
Shinya Shimokawa
Keyword(s):  
Global Warming ◽  
High Resolution ◽  
Sea Level ◽  
Storm Surge ◽  
High Velocity ◽  
High Tide ◽  
Disaster Mitigation ◽  
Ise Bay ◽  
Building Shape ◽  
Tide Level

Global warming is feared to cause sea-level rise and intensification of typhoons, and these changes will lead to an increase in storm surge levels. For that reason, it is essential to predict the inundation areas for the maximum potential typhoon and evaluate the disaster mitigation effect of seawalls. In this study, we analyzed storm surge inundation of the inner part of Ise Bay (coast of Aichi and Mie Prefecture, Japan) due to the maximum potential typhoon in the future climate with global warming. In the analysis, a high-resolution topographical model was constructed considering buildings’ shape and arrangement and investigated the inundation process inside the seawall in detail. The results showed that buildings strongly influence the storm surge inundation process inside the seawall, and a high-velocity current is generated in some areas. It is also found that closing the seawall door delays the inundation inside the seawall, but the evacuation after inundation is more difficult under the seawall doors closed condition than opened condition when the high tide level exceeds the seawall.

Ecology and behaviour of immature Culicoides melleus (Coq.) (Dipt., Ceratopogonidae)

1972 ◽  
Vol 62 (1) ◽  
pp. 113-127 ◽  
Author(s):  
J. R. Linley ◽  
G. M. Adams
Keyword(s):  
Intertidal Zone ◽  
Laboratory Experiments ◽  
High Tide ◽  
Time Of Day ◽  
Fourth Instar ◽  
Tidal Level ◽  
Sand Surface ◽  
Tide Level ◽  
The Vertical Distribution ◽  
Incoming Tide

The distribution of the larvae and pupae of Culicoides melleus (Coq.) in a natural beach habitat in an inlet on the Florida coast was studied in relation to tidal level and time of day. Larvae and pupae were confined to the intertidal zone and these distributions were unaffected by time of day or tidal level. Distributions of younger larval instars were displaced towards the inferred area of oviposition at higher elevations on the beach. Pupae were associated with the zone at and somewhat below high tide level. Differences in the vertical distribution of larvae between 0 and 2 in. deep between dark (pre-dawn)/low tide, morning/low tide and afternoon/low tide conditions were probably associated with larval response to light and heat.In laboratory experiments with a temperature gradient, second- to fourth-instar larvae preferred the 18–25°C range, but the fourth instars were the least discriminating. Laboratory experiments with a simulated beach showed that pupae flooded on an incoming tide remained in their burrows and immediately buried themselves more deeply when waves were generated in the water; they were able to return to the surface if buried, and survived drowning for four days. Inundated areas were avoided as pupation sites. The orientation of pupae at the sand surface and their formation in burrows was related to negative phototactic responses of the pupating larvae.

Sign in / Sign up

Export Citation Format

Share Document