Bed Shear Stress Coefficient Within the Surf Zone
Bed Shear Stress Coefficient Within the Surf Zone

Author: Carlos Severino Veitia Garcia

Publisher:

Published: 1977

Total Pages: 122

ISBN-13:

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An analytical formulation of the bed shear stress coefficient inside the surf zone is derived using the concept of radiation stress. A truncated Rayleigh p.d.f. is used to describe the wave field inside the surf zone and provides the input to calculate the variation of wave energy and longshore current as a function of wave height, water depth and distance to shore. The wave set-up is approximated using a sinusoidal wave solution. Field measurements of longshore current and waves within the surf zone are used to calculate the bed shear stress coefficient. Frequency distributions and statistics are calculated for the bed shear stress coefficient.

Turbulence In Coastal And Civil Engineering
Turbulence In Coastal And Civil Engineering

Author: B Mutlu Sumer

Publisher: World Scientific

Published: 2020-03-23

Total Pages: 758

ISBN-13: 9813234326

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This book discusses the subject of turbulence encountered in coastal and civil engineering.The primary aim of the book is to describe turbulence processes including transition to turbulence; mean and fluctuating flows in channels/pipes, and in currents; wave boundary layers (including boundary layers under solitary waves); streaming processes in wave boundary layers; turbulence processes in breaking waves including breaking solitary waves; turbulence processes such as bursting process and their implications for sediment transport; flow resistance in steady and wave boundary layers; and turbulent diffusion and dispersion processes in the coastal and river environment, including sediment transport due to diffusion/dispersion.Both phenomenological and statistical theories are described in great detail. Turbulence modelling is also described, and several examples for modelling of turbulence in steady flow and wave boundary layers are presented.The book ends with a chapter containing hands-on exercises on a wide variety of turbulent flows including experimental study of turbulence in an open-channel flow, using Laser Doppler Anemometry; Statistical, correlation and spectral analysis of turbulent air jet flow; Turbulence modelling of wave boundary layer flows; and numerical modelling of dispersion in a turbulent boundary layer, a set of exercises used by the authors in their Masters classes over many years.Although the book is essentially intended for professionals and researchers in the area of Coastal and Civil Engineering, and as a text book for graduate/post graduate students, the contents of the book will, however, additionally provide sufficient background in the study of turbulent flows relevant to many other disciplines, such as Wind Engineering, Mechanical Engineering, and Environmental Engineering.

Suspended Sediments Measured in the Surf Zone
Suspended Sediments Measured in the Surf Zone

Author: William Denton Morris

Publisher:

Published: 1977

Total Pages: 108

ISBN-13:

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Suspended sediments were measured optically within the surf zone at Torrey Pines Beach, California. Sediment laden water was sampled through three intake nozzles which were mounted on a tower along with the optical sensor (nephelometer) which was in line with the sediment laden water which was pumped to the shore. The nephelometer gave a time series of the suspended sediments. The water pumped to the beach was filtered to obtain total sediment concentration. Horizontal velocities were measured simultaneously with an electromagnetic current meter mounted on the same tower. During the experiments the breaker height ranged between 1 and 2 meters and the mean period between 8 to 16 seconds. The peaks of the nephelometer spectra occurred at approximately twice the peak frequency in the velocity spectra indicating two or more maximas per wave period. Cross spectra were computed between suspended sediments and horizontal velocity. A maximum coherence ranging above .7 occurred at the first harmonic of the peak wave frequency. The suspended sand was well sorted quartz with a mean grain size of 0.15 mm. Suspended sand concentration appeared to decrease exponentially with height above the bottom with the rate of decrease and total concentration related to the mean bed shear stress. Mean sand concentration ranged between 0.05 to 0.32 grams of sand per liter of sea water. (Author).

Coastal Engineering 2008 (In 5 Volumes) - Proceedings Of The 31st International Conference
Coastal Engineering 2008 (In 5 Volumes) - Proceedings Of The 31st International Conference

Author: Jane Mckee Smith

Publisher: World Scientific

Published: 2009-05-05

Total Pages: 5136

ISBN-13: 9814467561

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This proceedings contains papers presented at the 31st International Conference on Coastal Engineering, which has held in Hamburg, Germany (31 August - 5 September 2008). The proceeding is divided into five parts: Waves; Long Waves, Nearshore Currents, and Swash; Sediment Transport and Morphology; Coastal Management, Environment, and Risk; and Coastal Structures. The papers cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2008 provides coastal engineers, scientists, and planners, with state-of-the-art information on coastal engineering and coastal processes.

Advances in Coastal and Ocean Engineering
Advances in Coastal and Ocean Engineering

Author: Philip L. F. Liu

Publisher: World Scientific

Published: 2000

Total Pages: 250

ISBN-13: 9789810241360

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This invaluable volume consists of five articles covering a wide range of topics in coastal engineering. The reader can find a paper discussing the modern optical measurement techniques applied to wave studies. An introductory paper on wavelet theory provides readers with a new perspective on coastal and ocean engineering data analysis. For those who are interested in wave modeling, a review article on the stochastic evolution models is included. A detailed review paper on the recent sediment transport research should supply enough motivation for more research in this area. Finally, readers who are interested in history can find an interesting article reviewing the coastal development and coastal engineering activities in Japanese history.