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Mechanics Of Coastal Sediment Transport

Author: J?rgen Freds?e
Publisher: World Scientific
ISBN: 9789810208400
Size: 26.38 MB
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This book treats the subject of sediment transport in the marine environment, covering transport of non-cohesive sediment by waves and current in- and outside the surf zone. It can be read independently, but a background in hydraulics and basic wave mechanics is required. It is intended for M.Sc. and Ph.D. students. The primary aim of the book is to describe the physical processes of sediment transport and how to represent them in mathematical models. It does not present a large number of different formulae for the sediment transport rates under various conditions. The book can be divided in two main parts; in the first, the relevant hydrodynamic theory is described; in the second, sediment transport and morphological development are treated. The hydrodynamic 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 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.

The Proceedings Of The Coastal Sediments 2011

Author: Julie D Rosati
Publisher: World Scientific
ISBN: 981445852X
Size: 72.24 MB
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This proceedings contains nearly 200 papers on cutting-edge research presented at the seventh international Symposium on Coastal Engineering and Science of Coastal Sediment Processes, held May 2–6, 2011, in Miami, Florida, USA. This technical specialty conference was devoted to promoting an interdisciplinary exchange of state-of-the-art knowledge among researchers in the fields of coastal engineering, geology, oceanography, and related disciplines, with a theme of bringing together theory and practice. Focusing on the physical aspects of sediment processes in various coastal environments, this three-volume conference proceedings provides findings from the latest research and newest engineering applications. Session topics cover a wide range including barrier-island morphodynamics and evolution, beach nourishment and shore protection, coastal dunes, cohesive sediment transport, field and laboratory measurements of sediment transport processes and numerical modeling, gravel transport, large-scale and long-term coastal changes, LiDAR and remote sensing, longshore and cross-shore sediment transport, marsh and wetlands, regional sediment management, river deltas, sea-level changes, shelf and sand bodies, shoreline changes, tidal inlets and navigation channels. A special session on recent research findings at the Northern Gulf of Mexico is also included. Foreword Foreword (51k) Sample Chapter(s) Chapter 1: Coastal Engineering – Theory and Practice (122k) Contents: Prediction of Topography of Stable Beach Produced by Gravel Nourishment at Jinkoji Coast and Further Nourishment Using Medium Sand (Y Noshi et al.)Beach Nourishment with a High Percentage of Fine Sediments: A Modeling Study of the Tijuana Fate and Transport Project, California (J Lescinski et al.)Repetitive Breaching on Cedar Island, Virginia, USA: History, Geomorphology, and Deposits (J T Hanley & R A McBride)Large-Scale, Complex-Shaped Coastline Responses to Different Forms of Local Shoreline Stabilization and Climate Change (K Ells et al.)Barrier Island Responses to Potential Future Rates of Sea-Level Rise (A W Niedoroda et al.)A Field Test of the Theoretical Evolution of a Mixed-Energy Barrier Coast to a Regime of Accelerated Sea-Level Rise (M S Fenster et al.)The Mystery of Historical Channel Shoaling at Houston-Galveston Navigation Channel, TX (J D Rosati et al.)A Port Site-Selection Study Governed by Sediment Transport Characteristics in the Persian Gulf (B Banijamali & S Sorourian)Nearshore Disposal of Fine-Grained Sediment in a High-Energy Environment: Santa Cruz Harbor Case Study (K Cronin et al.)Monitoring a Dredged Material Disposal Site on the Continental Shelf Using the Dynamic Penetrometer Nimrod (B Flaim et al.)Characterizing the Impact of Significant Dune Erosion along the Sefton Coast, NW England (L S Esteves & J J Williams)Interannual to Decadal Foredune Evolution (P Ruggiero et al.)Role of Suction Dynamics Effects in Intertidal Sandbar Morphodynamics (S Sassa & Y Watabe)Sand Bar Response to Different Wave Energy and Beach Environments in Two Florida Counties (L Absalonsen & R G Dean)Mechanism of Recent and Rapid Beach Erosion on the Yokosuka Coast, Japan (N X Tinh et al.)Quantification of Shoreline Morphology and Isolation of a Longshore Sediment Wave on a Sand Limited Shoreline in Cameron Parish, LA (M Campbell et al.)Modern-Ancient Analogues of Sand Bodies: A Tool for Sand Source Exploration (G A Zarillo)An Analysis of Morphological Parameters for Shoals of the Mid-Atlantic Bight, USA (R Narin et al.)Barrier Island Habitat Creation at Decadal Scales (T W Kana et al.)Model for Predicting Formation of Bar Barrier in Flat Shallow Sea (T Uda & M Serizawa)Process-Based Model Predictions of Hurricane Induced Morphodynamic Change on Low-Lying Barrier Islands (N G Plant et al.)Profile Change and Post-Storm Recovery of Delaware Beaches Resulting from Three Consecutive Storms in 2009 (T M Roberts & P Wang)Measurements and Analysis of Near Bed Sediment Processes by Waves in Rippled Bed and Plane Bed Regime (A Ahmari & H Oumeraci)Physical Modelling of Morphological Chang and Energy Dissipation on Gravel Beaches (A Atladóttir et al.)A Numerical Investigation on Hyperpycnal Flow (J-L Chen et al.)and other papers Readership: Graduate students and research in coastal engineering.Keywords:Key Features: Most up-to-date information and knowledge Broad worldwide attendance In depth technical focus

Coastal Bottom Boundary Layers And Sediment Transport

Author: Peter Nielsen
Publisher: World Scientific
ISBN: 9789810204730
Size: 17.21 MB
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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.

A Unified Sediment Transport Formulation For Coastal Inlet Application

Author: Benoît Camenen
Publisher:
ISBN:
Size: 16.73 MB
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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.

Estuarine And Coastal Modeling

Author: Malcolm L. Spaulding
Publisher:
ISBN: 9780784408766
Size: 74.78 MB
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Estuarine and Coastal Modeling contains 48 papers that were presented at the Ninth International Conference on Estuarine and Coastal Modeling held in Charleston, South Carolina, from October 31 to November 2, 2005. This practical book explores the development, testing, application, calibration, validation, and visualization of predictions from estuarine and coastal models. The papers are divided into 20 oral sessions and 1 poster session featuring model application and demonstration of model visualization and systems integration. They cover various aspects of estuarine and coastal modeling, climatology and skill assessment, particle tracking, residence times and spill analysis, biogeomechanical modeling, numerical techniques, structure and methods, Nowcast / forecast systems, sediment re-suspension and transport, restoration modeling, and combined wave?current modeling.