Author: Ib A. Svendsen
Publisher:
ISBN:
Category : Ocean circulation
Languages : en
Pages : 214

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 27

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A curvilinear version of the nearshore circulation model SHORECIRC is developed based on the quasi-3D nearshore circulation equations derived by Putrevu and Svendsen [Eur. J. Mech. 18 (1999) 409 427]. We use a generalized coordinate transformation and re-derive the equations in tensor-invariant forms. The contravariant component technique is used to simplify both the transformed equations and boundary conditions. A high-order finite-difference scheme with a staggered grid in the image domain is adopted for the numerical model. Very good convergence rates with both grid refinement and time refinement are obtained in a simple convergence test. The model is then applied to four cases involving either a non-orthogonal quadrilateral grid or a generalized curvilinear grid. The versatility of the curvilinear model in dealing with curved shorelines, nearshore breakwaters and other complicated geometries is demonstrated in the test cases. The accuracy of the model is shown in the paper through model/data comparisons in two of the case studies.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 262

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In this thesis a depth integrated, shortwave averaged nearshore circulation model, called SHORECIRC, is developed, which includes the current current and current wave interactions over depth. This model belongs to the class of quasi 3D models, which combine the effect of the vertical structure with the simplicity of 2DH models. The present model uses semi-analytical solutions for the 3D current profiles in combination with a numerical solution of the depth integrated 2D horizontal equations. The goal of this model is to gain an enhanced prediction and analysis capability for nearshore circulation on any bathymetry and under any hydrodynamical condition. The current current, current wave induced dispersion mechanism has previously been found to significantly augment the lateral turbulent mixing in the case of a steady, uniform longshore current on a straight coast. In this thesis, the generalized quasi 3-D continuity and momentum equations governing nearshore circulation are presented. These equations are based on the complete Reynolds equations with as few additional assumptions as possible.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 14

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A coupled wave-hydrodynamic modeling system, comprised of a random wave model driving a quasi-3D nearshore hydrodynamic model, is described. Random wave formulations for several inputs to the hydrodynamic model are developed. An alternate wave dissipation mechanism is incorporated into the random wave model, and two wave roller descriptions are implemented to calculate volume flux and other roller-dependent input properties. Comparison to laboratory and field data indicate that an evolving roller description, in conjunction with the 3D dispersive mixing inherent in the hydrodynamic model, yield the best results. A method to nest the model system inside larger-scale wave models is described, and an application to an area of complex bathymetry shown.

Author: N. W. H. Allsop
Publisher: Thomas Telford
ISBN: 9780727734556
Category : Nature
Languages : en
Pages : 588

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Book Description
Of gently sloping revetment in Japan / T. Uda, M. Serizawa, S. Seino, Y. Hoshigami, T. San-nami and K. Furuike -- Rehabilitation and redesign of the Gismeroy industrial area sea wall in Mandal, Norway / A.E. Lothe and T. Birkeland -- Evaluation of wave climate parameters from benchmarking flotsam levels / J. Grune -- Optimum safety levels for rubble mound breakwaters / H.F. Burcharth and J.D. Sorensen -- Tiered reliability-based methods for assessing the structural performance of coastal defences / F.A. Buijs, S. Segura Dominguez, P.B. Sayera, J.D. Simm and J.W. Hall -- Monitoring and maintenance of coastal structures / D. Phelp -- Composite-berm rubble mound breakwater / J. Melby.

Author: Jane McKee Smith
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 1114

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Author: Ib A. Svendsen
Publisher: World Scientific
ISBN: 9812561420
Category : Technology & Engineering
Languages : en
Pages : 748

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Book Description
This book is intended as an introductory textbook for graduate students and as a reference book for engineers and scientists working in the field of coastal engineering. As such it gives a description of the theories for wave and nearshore hydrodynamics. It is meant to de-mystify the topics and hence starts at a fairly basic level. It requires knowledge of fluid mechanics equivalent to a first year graduate level. At the end of each topic, an attempt is made to give an overview of the present stage of the scientific development in that area with numerous references for further studies.

Author: Jane Mckee Smith
Publisher: World Scientific
ISBN: 9814480525
Category : Science
Languages : en
Pages : 4836

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Book Description
This comprehensive and up-to-date volume contains 367 papers presented at the 29th International Conference on Coastal Engineering, held in Lisbon, Portugal, 19-24 September 2004. It is divided into five parts: waves; long waves, nearshore currents, and swash; sediment transport and morphology; coastal management, beach nourishment, and dredging; coastal structures. The contributions cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2004 provides engineers, scientists, and planners state-of-the-art information on coastal engineering and coastal processes.The proceedings have been selected for coverage in:

Author: John Wainwright
Publisher: John Wiley & Sons
ISBN: 0470749113
Category : Technology & Engineering
Languages : en
Pages : 493

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Book Description
Simulation models are an established method used to investigate processes and solve practical problems in a wide variety of disciplines. Central to the concept of this second edition is the idea that environmental systems are complex, open systems. The authors present the diversity of approaches to dealing with environmental complexity and then encourage readers to make comparisons between these approaches and between different disciplines. Environmental Modelling: Finding Simplicity in Complexity 2nd edition is divided into four main sections: An overview of methods and approaches to modelling. State of the art for modelling environmental processes Tools used and models for management Current and future developments. The second edition evolves from the first by providing additional emphasis and material for those students wishing to specialize in environmental modelling. This edition: Focuses on simplifying complex environmental systems. Reviews current software, tools and techniques for modelling. Gives practical examples from a wide variety of disciplines, e.g. climatology, ecology, hydrology, geomorphology and engineering. Has an associated website containing colour images, links to WWW resources and chapter support pages, including data sets relating to case studies, exercises and model animations. This book is suitable for final year undergraduates and postgraduates in environmental modelling, environmental science, civil engineering and biology who will already be familiar with the subject and are moving on to specialize in the field. It is also designed to appeal to professionals interested in the environmental sciences, including environmental consultants, government employees, civil engineers, geographers, ecologists, meteorologists, and geochemists.