Enhanced Hydrodynamical Numerical Model For Near Shore Processes
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Enhanced Hydrodynamical Numerical Model For Near Shore Processes
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Author : R. A. Bauer
language : en
Publisher:
Release Date : 1978
Enhanced Hydrodynamical Numerical Model For Near Shore Processes written by R. A. Bauer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Hydrodynamics categories.
Enhanced Hydrodynamical Numerical Model For Near Shore Processes
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Author : R. A. Bauer
language : en
Publisher:
Release Date : 1978
Enhanced Hydrodynamical Numerical Model For Near Shore Processes written by R. A. Bauer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Hydrodynamics categories.
User Guide For The Enhanced Hydrodynamical Numerical Model
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Author : A. D. Stroud
language : en
Publisher:
Release Date : 1978
User Guide For The Enhanced Hydrodynamical Numerical Model written by A. D. Stroud and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Hydrodynamics categories.
Numerical Modeling Of Cross Shore Sediment Transport And Sandbar Migration
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Author : Mustafa Kemal Cambazoglu
language : en
Publisher:
Release Date : 2009
Numerical Modeling Of Cross Shore Sediment Transport And Sandbar Migration written by Mustafa Kemal Cambazoglu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Beach erosion categories.
Nearshore processes on barred beaches are studied with a process-based numerical model. The two major goals of the study are to expand the body of knowledge about nearshore processes on barred beaches gaining a better understanding of the physical mechanisms affecting bar migration events and to enhance the numerical model in order to accomplish realistic simulations of bar migration events on storm time scales. The numerical model is used to study the effect of physical processes on the hydrodynamics and morphodynamics in the nearshore environment. The numerical model system consists of a linear spectral refraction-diffraction model, REF/DIF S, a quasi-3D nearshore circulation module, SHORECIRC, energetics-based sediment transport models, and a morphological evolution model. A laboratory experiment with an offshore bar migration case followed by an onshore bar migration case is used for modeling purposes and verifications. A number of enhancements are made to the wave and circulation modules of the numerical model system specifically for simulations on barred beaches. The model modifications and enhancements are: a combined breaking wave parameter with a spatial variation in the wave model, a method accounting for breaking wave persistence in the wave model, a method accounting for the new breaker roller lag in the wave model, the dynamic pressure component in the radiation stress forcing, a roller contribution with different depth variation options for the short wave forcing in the circulation model, wave height instead of water depth as the turbulent length scale in the eddy viscosity calculations in the circulation model, and a slope term for the default sediment transport formula. The effect of surface shape parameter and the roller face angle on radiation stress and mean water level predictions are investigated. In reality, the organized wave energy is transferred to roller development over a transition distance and the roller does not immediately contribute to the radiation stresses; therefore, showing the importance of the roller lag mechanism for mean water level predictions. The cross-shore variation of the vertical momentum balance is studied to observe the variation of forcing agents of the undertow current. The cross-shore pressure gradient is the most dominant forcing term affecting the depth structure of the undertow current. The effect of different depth variations of the roller contribution to the short wave forcing on the undertow current is investigated. The mechanism accounting for breaking wave persistence and the mechanism accounting for the roller lag are shown to be important for predictions of the undertow currents on barred beaches. The skewed wave orbital velocities are introduced to the linear wave model by an empirical parametrization method and are found to contribute strongly to the onshore bar migration. The enhancements made to the wave dissipation and roller are found to significantly affect the predicted migration of the bar as well as the maintainance of the trough.
Advances In Coastal Modeling
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Author : V.C. Lakhan
language : en
Publisher: Elsevier
Release Date : 2003-10-24
Advances In Coastal Modeling written by V.C. Lakhan and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-10-24 with Science categories.
This book unifies and enhances the accessibility of contemporary scholarly research on advances in coastal modeling. A comprehensive spectrum of innovative models addresses the wide diversity and multifaceted aspects of coastal research on the complex natural processes, dynamics, interactions and responses of the coastal supersystem and its associated subsystems. The twenty-one chapters, contributed by internationally recognized coastal experts from fourteen countries, provide invaluable insights on the recent advances and present state-of-the-art knowledge on coastal models which are essential for not only illuminating the governing coastal process and various characteristics, but also for understanding and predicting the dynamics at work in the coastal system. One of the unique strengths of the book is the impressive and encompassing presentation of current functional and operational coastal models for all those concerned with and interested in the modeling of seas, oceans and coasts. In addition to chapters modeling the dynamic natural processes of waves, currents, circulatory flows and sediment transport there are also chapters that focus on the modeling of beaches, shorelines, tidal basins and shore platforms. The substantial scope of the book is further strengthened with chapters concentrating on the effects of coastal structures on nearshore flows, coastal water quality, coastal pollution, coastal ecological modeling, statistical data modeling, and coupling of coastal models with geographical information systems.
Including Nearshore Processes In Phase Averaged Hydrodynamics Models
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Author :
language : en
Publisher:
Release Date : 2006
Including Nearshore Processes In Phase Averaged Hydrodynamics Models written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
The large spatial and time scales of the numerical modeling projects of the U.S. Army Corps of Engineers (USACE) requires the use of computationally efficient phase-averaged hydrodynamic models derived by averaging the equations of motion over a representative short wave period. Guidance in modeling nearshore regions with phase-averaged hydrodynamic models is provided herein. Physical processes unique to the surf zone are described along with methods of incorporating these effects to improve hydrodynamic predictions. Comparisons to detailed measurements from a laboratory basin experiment are used to demonstrate the significance of including processes unique to nearshore regions. To provide guidance that is applicable to varied phase-averaged models, details of the implementation are not provided herein, and the focus is on conceptual models.
Dynamics Of The Coastal Zone
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Author : Matteo Postacchini
language : en
Publisher: MDPI
Release Date : 2020-03-19
Dynamics Of The Coastal Zone written by Matteo Postacchini and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-19 with Technology & Engineering categories.
The coastal zone is the host to many human activities, which have significantly increased in the last decades. However, sea level rise and more frequent storm events severely affect beaches and coastal structures, with negative consequences and dramatic impacts on coastal communities. These aspects add to typical coastal problems, like flooding and beach erosion, which already leading to large economic losses and human fatalities. Modeling is thus fundamental for an exhaustive understanding of the nearshore region in the present and future environment. Innovative tools and technologies may help to better understand coastal processes in terms of hydrodynamics, sediment transport, bed morphology, and their interaction with coastal structures. This book collects several contributions focusing on nearshore dynamics, and span among several time and spatial scales using both physical and numerical approaches. The aim is to describe the most recent advances in coastal dynamics.
Monthly Catalogue United States Public Documents
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Author :
language : en
Publisher:
Release Date : 1979
Monthly Catalogue United States Public Documents written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Government publications categories.
Monthly Catalog Of United States Government Publications
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Author : United States. Superintendent of Documents
language : en
Publisher:
Release Date : 1968
Monthly Catalog Of United States Government Publications written by United States. Superintendent of Documents and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Government publications categories.
Monthly Catalog Of United States Government Publications
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Author :
language : en
Publisher:
Release Date : 1979
Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Government publications categories.