Field Observations of Edge Waves

Nature ◽  
1973 ◽  
Vol 243 (5403) ◽  
pp. 160-162 ◽  
Author(s):  
D. A. HUNTLEY ◽  
A. J. BOWEN
Keyword(s):  
Field Observations ◽  
Edge Waves

scholarly journals Transformation of internal solitary waves at the "deep" and "shallow" shelf: satellite observations and laboratory experiment

2013 ◽  
Vol 20 (5) ◽  
pp. 743-757 ◽  
Author(s):  
O. D. Shishkina ◽  
J. K. Sveen ◽  
J. Grue
Keyword(s):  
Solitary Wave ◽  
Solitary Waves ◽  
Laboratory Data ◽  
Water Layer ◽  
Internal Solitary Waves ◽  
Field Observations ◽  
Edge Waves ◽  
Sar Images ◽  
Time Periods ◽  
Bottom Step

Abstract. An interaction of internal solitary waves with the shelf edge in the time periods related to the presence of a pronounced seasonal pycnocline in the Red Sea and in the Alboran Sea is analysed via satellite photos and SAR images. Laboratory data on transformation of a solitary wave of depression while passing along the transverse bottom step were obtained in a tank with a two-layer stratified fluid. The certain difference between two characteristic types of hydrophysical phenomena was revealed both in the field observations and in experiments. The hydrological conditions for these two processes were named the "deep" and the "shallow" shelf respectively. The first one provides the generation of the secondary periodic short internal waves – "runaway" edge waves – due to change in the polarity of a part of a soliton approaching the shelf normally. Another one causes a periodic shear flow in the upper quasi-homogeneous water layer with the period of incident solitary wave. The strength of the revealed mechanisms depends on the thickness of the water layer between the pycnocline and the shelf bottom as well as on the amplitude of the incident solitary wave.

Simulations of Dissipative, Shore-Oblique Infragravity Waves

2003 ◽  
Vol 33 (8) ◽  
pp. 1722-1732 ◽  
Author(s):  
Stephen M. Henderson ◽  
A. J. Bowen
Keyword(s):  
Water Waves ◽  
Turning Point ◽  
Energy Transport ◽  
Evanescent Waves ◽  
Field Observations ◽  
Edge Waves ◽  
Shallow Water Waves ◽  
Infragravity Waves ◽  
Incident Waves ◽  
Infragravity Wave

Abstract A model of forced, dissipative shore-oblique shallow water waves predicts net cross-shore infragravity wave propagation, in qualitative agreement with field observations. Forcing applied near the shore generates edge waves, whose energy is mostly trapped shoreward of the edge wave turning point. Forcing applied sufficiently far seaward of the turning point generates only evanescent waves, whose energy decays almost exponentially with distance from regions of forcing. Weakly dissipative edge waves are nearly cross-shore standing, whereas strongly dissipative edge waves propagate obliquely across-shore. Groups of directionally spread incident waves can nonlinearly force evanescent bound waves, which propagate shoreward, lowering the sea level under large incident waves. Unlike the bound waves described by previous researchers, evanescent bound waves are not released when incident waves break and do not radiate far from the breakpoint. Regions of evanescent waves between the shoreface and shore-parallel sandbars are barriers to energy transport, which can decouple bar- and shore-trapped waves even when dissipation is weak.

Field observations of surf beat: 1. Progressive edge waves

1981 ◽  
Vol 86 (C7) ◽  
pp. 6451 ◽  
Author(s):  
D. A. Huntley ◽  
R. T. Guza ◽  
E. B. Thornton
Keyword(s):  
Field Observations ◽  
Edge Waves

Field observations of long-period, surf-zone standing waves in relation to contrasting beach morphologies

1982 ◽  
Vol 33 (2) ◽  
pp. 181 ◽  
Author(s):  
LD Wright
Keyword(s):  
Surf Zone ◽  
Full Range ◽  
Wave Length ◽  
Standing Waves ◽  
Wide Band ◽  
Field Observations ◽  
Edge Waves ◽  
Long Period ◽  
Energy Height ◽  
Velocity Spectra

Field observations of water-surface oscillation and horizontal flow velocity spectra were carried out in the surf zones of contrasting beach-inshore morphodynamic states. The observations were made under conditions of long-period (7.5-11 s), moderate-energy (height 1 .2-2.3 m) swell on different beaches encompassing the full range of states from the steep. reflective extreme to the flat, dissipative extreme and including intermediate states involving different scales of rhythmic surf-zone topography and rip circulations. Experiments on all types of topography reveal standing surf-zone oscillations at periods longer than incident wave period. At least some of these appear to be edge waves. The actual frequencies are dependent on the morphodynamic state of the surf zone and beach. The standing waves with shortest period are zero-mode subharmonic edge waves which consistently occur on highly reflective beaches where they cause cusps spaced at one-half the edge-wave length. The standing waves with lowest frequency were observed on the flattest and most dissipative beach and comprised a wide band of infragravity frequencies. These oscillations could cause the multiple parallel bars. Intermediate frequencies occur in the presence of the pronounced bar-trough and rhythmic topographies of intermediate morphodynamic states.

scholarly journals Field observations of bar-trapped edge waves

1998 ◽  
Vol 103 (C1) ◽  
pp. 1285-1305 ◽  
Author(s):  
K. R. Bryan ◽  
P. A. Howd ◽  
A. J. Bowen
Keyword(s):  
Field Observations ◽  
Edge Waves

Field observations of edge waves and their effect on beach material

1975 ◽  
Vol 131 (1) ◽  
pp. 69-81 ◽  
Author(s):  
D. A. HUNTLEY ◽  
A. J. BOWEN
Keyword(s):  
Field Observations ◽  
Edge Waves

scholarly journals NEARSHORE CURRENT ON A GENTLY SLOPING BEACH

1976 ◽  
Vol 1 (15) ◽  
pp. 35 ◽  
Author(s):  
Tamio Sasaki ◽  
Kiyoshi Horikawa ◽  
Shintaro Hotta
Keyword(s):  
Field Observation ◽  
Observation System ◽  
Field Observations ◽  
Edge Waves ◽  
Simultaneous Measurements ◽  
Waves And Currents ◽  
Nearshore Currents ◽  
Sloping Beach

The authors developed a new field observation system called STEREOBACS by which simultaneous measurements of a spacial distribution on waves and currents in the nearshore environment can be obtained. This system was applyed on Ajigaura Beach, Japan, and several analyzed results are presented. Also field observations of infragravity low mode edge waves to support the Infragravity Domain Hypothesis on nearshore currents concerning a gently sloping beach [Sasaki(1974,1975), Sasaki and Horikawa (1975)] are introduced.

On Methodology for Designing Architectural Lighting of Production Site Interior

2020 ◽  
pp. 10-21 ◽  
Author(s):  
Vladimir V. Voronov ◽  
Nikolay I. Shchepetkov
Keyword(s):  
Architectural Design ◽  
Comprehensive Approach ◽  
Scientific Methodology ◽  
Field Observations ◽  
Production Site ◽  
Artificial Illumination ◽  
Engineering Parameters ◽  
Architectural Lighting ◽  
Candidate Thesis

The article describes content of original and relevant but virtually forgotten thesis of V.V. Voronov on lighting of production site interiors by means of overhead natural (using three types of skylights) and artificial illumination, in order to elaborate scientific methodology for architectural design of more qualitative luminous environment on the basis of comprehensive approach and enhanced criteria framework of its evaluation using light engineering parameters. The thesis is unique in terms of the scope and quality of field and laboratory observations which are reflected not only in the text but also in the graphical attachments, namely photos, figures, schemes, drawings, charts, nomograms, and diagrams accompanied by specific measured or calculated parameters. The first part of the thesis contains theoretical basics and results of field observations conducted by different methods. This second part is the exposition of chapter 3 of the V.V. Voronov’s candidate thesis (1985). It describes the methodology for and the results of the experiments by means of planar and volumetric light simulation using the architectural lighting simulating assembly (chamber) which were conducted in MARKHI in 1970–1985.

Concerning the Concept of Light-Colour Arrangement of the Urban Environment in the Central Part of Tyumen

2020 ◽  
pp. 34-42
Author(s):  
Nikolay I. Shchepetkov ◽  
Svetlana B. Kapeleva ◽  
Denis V. Bugaev ◽  
Gregory S. Matovnikov ◽  
Anna S. Kostareva
Keyword(s):  
Urban Environment ◽  
Comprehensive Analysis ◽  
Assessment Criteria ◽  
Field Observations ◽  
General Plan ◽  
Design Solutions ◽  
Methodological Principles ◽  
The City

The article provides a comprehensive analysis of outdoor lighting in the central part of Tyumen (with consideration of conducted field observations) and prospects of its development on the basis of the general plan of illumination of the central part of the city being under design. Main provisions of this general plan as well as methodological principles and assessment criteria of design solutions illustrat-ed by photographs, schemes and visualisations of the illuminated objects are described.

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