Wave Boundary Layers And Their Relation To Sediment Transport

Author : Peter Nielsen
Publisher : World Scientific
Page : 356 pages
File Size : 52,8 Mb
Release : 1992
Category : Science
ISBN : 9810204736

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Coastal Bottom Boundary Layers and Sediment Transport by Peter Nielsen Pdf

This book is intended as a useful handbook for professionals and researchers in the areas of Physical Oceanography, Marine Geology, Coastal Geomorphology and Coastal Engineering and as a text for graduate students in these fields. With its emphasis on boundary layer flow and basic sediment transport modelling, it is meant to help fill the gap between general hydrodynamic texts and descriptive texts on marine and coastal sedimentary processes. The book commences with a review of coastal bottom boundary layer flows including the boundary layer interaction between waves and steady currents. The concept of eddy viscosity for these flows is discussed in depth because of its relation to sediment diffusivity. The quasi-steady processes of sediment transport over flat beds are discussed. Small scale coastal bedforms and the corresponding hydraulic roughness are described. The motion of suspended sand particles is studied in detail with emphasis on the possible suspension maintaining mechanisms in coastal flows. Sediment pickup functions are provided for unsteady flows. A new combined convection-diffusion model is provided for suspended sediment distributions. Different methods of sediment transport model building are presented together with some classical models.

Author : Liqin Zuo
Publisher : CRC Press
Page : 205 pages
File Size : 51,8 Mb
Release : 2018-06-19
Category : Science
ISBN : 9780429794025

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Modelling and Analysis of Fine Sediment Transport in Wave-Current Bottom Boundary Layer by Liqin Zuo Pdf

The evolution and utilization of estuarine and coastal regions are greatly restricted by sediment problems. This thesis aims to better understand fine sediment transport under combined action of waves and currents, especially in the wave-current bottom boundary layer (BBL). Field observations, experimental data analysis, theoretical analysis and numerical models are employed. Silt-dominated sediments are sensitive to flow dynamics and the suspended sediment concentration (SSC) increase rapidly under strong flow dynamics. This research unveils several fundamental aspects of silty sediment, i.e., the criterion of the incipient motion, the SSC profiles and their phase-averaged parameterization in wave-dominated conditions. An expression for sediment incipient motion is proposed for silt-sand sediment under combined wave and current conditions. A process based intra-wave 1DV model for flow-sediment dynamics near the bed is developed in combined wave-current conditions. The high concentration layer (HCL) was simulated and sensitivity analysis was carried out by the 1DV model on factors that impact the SSC in the HCL. Finally, based on the 1DV model, the formulations of the mean SSC profile of silt-sand sediments in wave conditions were proposed. The developed approaches are expected to be applied in engineering practice and further simulation.

Author : Jørgen Fredsøe,Rolf Deigaard
Publisher : World Scientific Publishing Company
Page : 392 pages
File Size : 50,9 Mb
Release : 1992-11-02
Category : Technology & Engineering
ISBN : 9789814365680

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Mechanics of Coastal Sediment Transport by Jørgen Fredsøe,Rolf Deigaard Pdf

This book treats the subject of sediment transport in the marine environment, covering transport of noncohesive sediment by waves and currents in- and outside the surf zone. It can be read independently, but a background in hydraulics and basic wave mechanics is required. The primary aim of the book is to describe the physical processes of sediment transport and how to represent them in mathematical models. The book can be divided in two main parts; in the first, the relevant hydrodynamic theory is described. This part contains a review of elementary theory for water waves, chapters on the turbulent wave boundary layer and the turbulent interaction between waves and currents, and finally, surf zone hydrodynamics and wave driven currents. The second part covers sediment transport and morphological development.The part on sediment transport introduces the basic concepts (critical bed shear stress, bed load, suspended load and sheet layer, near-bed concentration, effect of sloping bed); it treats suspended sediment in waves and current and in the surf zone, and current and wave-generated bed forms. Finally, the modelling of cross-shore and long-shore sediment transport is described together with the development of coastal profiles and coastlines.

Author : Anonim
Publisher : Unknown
Page : 552 pages
File Size : 44,5 Mb
Release : 1981
Category : Hydrology
ISBN : UOM:39015034724461

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Selected Water Resources Abstracts by Anonim Pdf

Author : Palitha Nalin Wikramanayake,Ole Secher Madsen
Publisher : Unknown
Page : 222 pages
File Size : 55,9 Mb
Release : 1994
Category : Hydrodynamics
ISBN : ERDC:35925002900030

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Calculation of Suspended Sediment Transport by Combined Wave-current Flows by Palitha Nalin Wikramanayake,Ole Secher Madsen Pdf

Author : Andre Szuwalski
Publisher : Unknown
Page : 136 pages
File Size : 42,5 Mb
Release : 1978
Category : Oceanography
ISBN : UOM:39015095240522

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Annotated Bibliography of CERC Publications by Andre Szuwalski Pdf

Author : J. Richard Weggel
Publisher : Unknown
Page : 20 pages
File Size : 50,7 Mb
Release : 1972
Category : Ocean waves
ISBN : UCR:31210018955482

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An Introduction to Oceanic Water Motions and Their Relation to Sediment Transport by J. Richard Weggel Pdf

Author : Anonim
Publisher : Unknown
Page : 314 pages
File Size : 47,7 Mb
Release : 1981
Category : Water
ISBN : PSU:000068688950

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Selected Water Resources Abstracts by Anonim Pdf

Author : R. E. Meyer
Publisher : Elsevier
Page : 470 pages
File Size : 43,9 Mb
Release : 2013-09-24
Category : Science
ISBN : 9781483264523

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Waves on Beaches and Resulting Sediment Transport by R. E. Meyer Pdf

Waves on Beaches and Resulting Sediment Transport documents the proceedings of an Advanced Seminar held in October, 1971, aiming to offer a coherent, interdisciplinary view of the state of physical research in coastal oceanography and the direction in which this subject is moving. The articles range from wave refraction to littoral erosion, and the authors from geologists to mathematicians. The book opens with a study on the characteristics of wave records in the coastal zone. This is followed by separate chapters on sediment transport in beaches; equations for water waves; small-amplitude normal oscillations of a liquid body; and wave behavior near caustics in models and in nature. Subsequent chapters deal with nonlinear wave interaction in a variety of physical phenomena including deep water waves; the study of longshore currents; sediment suspension by periodic waves; forms of sediment accumulation in the beach zone; run-up on beaches; and the wave breaking process in shallow water.

Author : Benoît Camenen
Publisher : Unknown
Page : 252 pages
File Size : 45,5 Mb
Release : 2007
Category : Inlets
ISBN : UCR:31210024818138

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A Unified Sediment Transport Formulation for Coastal Inlet Application by Benoît Camenen Pdf

The Coastal Inlets Research Program (CIRP) is developing predictive numerical models for simulating the waves, currents, sediment transport, and morphology change at and around coastal inlets. Water motion at a coastal inlet is a combination of quasi-steady currents such as river flow, tidal current, wind-generated current, and seiching, and of oscillatory flows generated by surface waves. Waves can also create quasi-steady currents, and the waves can be breaking or non-breaking, greatly changing potential for sediment transport. These flows act in arbitrary combinations with different magnitudes and directions to mobilize and transport sediment. Reliable prediction of morphology change requires accurate predictive formulas for sediment transport rates that smoothly match in the various regimes of water motion. This report describes results of a research effort conducted to develop unified sediment transport rate predictive formulas for application in the coastal inlet environment. The formulas were calibrated with a wide range of available measurements compiled from the laboratory and field and then implemented in the CIRP's Coastal Modeling System. Emphasis of the study was on reliable predictions over a wide range of input conditions. All relevant physical processes were incorporated to obtain greatest generality, including: (1) bed load and suspended load, (2) waves and currents, (3) breaking and non-breaking waves, (4) bottom slope, (5) initiation of motion, (6) asymmetric wave velocity, and (7) arbitrary angle between waves and current. A large database on sediment transport measurements made in the laboratory and the field was compiled to test different aspects of the formulation over the widest possible range of conditions. Other phenomena or mechanisms may also be of importance, such as the phase lag between water and sediment motion or the influence of bed forms. Modifications to the general formulation are derived to take these phenomena into account. The.

Author : Peter Nielsen
Publisher : World Scientific Publishing Company
Page : 340 pages
File Size : 46,7 Mb
Release : 1992-07-21
Category : Technology & Engineering
ISBN : 9789813103580

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Coastal Bottom Boundary Layers And Sediment Transport by Peter Nielsen Pdf

This book is intended as a useful handbook for professionals and researchers in the areas of Physical Oceanography, Marine Geology, Coastal Geomorphology and Coastal Engineering and as a text for graduate students in these fields. With its emphasis on boundary layer flow and basic sediment transport modelling, it is meant to help fill the gap between general hydrodynamic texts and descriptive texts on marine and coastal sedimentary processes. The book commences with a review of coastal bottom boundary layer flows including the boundary layer interaction between waves and steady currents. The concept of eddy viscosity for these flows is discussed in depth because of its relation to sediment diffusivity. The quasi-steady processes of sediment transport over flat beds are discussed. Small scale coastal bedforms and the corresponding hydraulic roughness are described. The motion of suspended sand particles is studied in detail with emphasis on the possible suspension maintaining mechanisms in coastal flows. Sediment pickup functions are provided for unsteady flows. A new combined convection-diffusion model is provided for suspended sediment distributions. Different methods of sediment transport model building are presented together with some classical models.

Author : B Mutlu Sumer,David R Fuhrman
Publisher : World Scientific
Page : 758 pages
File Size : 50,8 Mb
Release : 2020-03-23
Category : Technology & Engineering
ISBN : 9789813234321

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Turbulence In Coastal And Civil Engineering by B Mutlu Sumer,David R Fuhrman Pdf

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.

Author : Andrew W. Garcia
Publisher : Unknown
Page : 68 pages
File Size : 46,8 Mb
Release : 1976
Category : Dredging
ISBN : UOM:39015086523159

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Beach Nourishment Techniques by Andrew W. Garcia Pdf

Author : Waterways Experiment Station (U.S.)
Publisher : Unknown
Page : 632 pages
File Size : 55,8 Mb
Release : 1976
Category : Electronic
ISBN : UOM:39015047385326

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Technical Memodrandum by Waterways Experiment Station (U.S.) Pdf

Author : United States. Army. Corps of Engineers. Task Force on Shore Protection
Publisher : Unknown
Page : 894 pages
File Size : 41,5 Mb
Release : 1985
Category : Shore protection
ISBN : ERDC:35925003461883

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Review of the Corps of Engineers Approach to the Problem of Shoreline Erosion Control by United States. Army. Corps of Engineers. Task Force on Shore Protection Pdf