Sediment Transport Mechanisms In Coastal Environments And Rivers

These proceedings contain papers by some of the world's leading experts in the analytical and numerical modelling of sediment transport, its measurement on site and in the laboratory, river and coastal morphology, and similar issues. These topics are of fundamental importance in many areas (such as the silting or erosion of coasts and rivers, and the design of fluvial or coastal structures) and should consequently be of interest to a wide audience in engineering, geology and related disciplines. Contents:Structure of Turbulence Over Two-Dimensional Dunes (S J Bennett & J L Best)Numerical Study on Transition to Turbulence in a Wave Boundary Layer (H Tanaka & A Sana)Numerical Modelling of Three-Dimensional Cohesive Sediment Transport in an Estuarine Environment (L Cancino & R Neves)Settlement: A Sedimentary Process (M Sanchez & A Grovel)Mass Transport Over Rippled Beds (F Marin & J F A Sleath)Laboratory Experiments on Sediment Erosion Induced by Partially Standing Waves (V Rey et al)The Behaviour, Interaction and Effect of Depositing Grains (M V C Wheeler & B B Willetts)Breaking Waves-Plunging Point and Its Effects (Y Yüksel & M S Kapdasli)A Field Study of Wave-Current Interactions Over a Rippled Sand Bed (A Hannay et al)Sediment Suspension by Turbulence in the Surf Zone (G G Smith & G P Mocke)On Nuclear Gauging of Natural Streams (G S Tazioli)and other papers Readership: Engineers, geographers and geologists.keywords:

The interface of 440,000 km long coastline in the world is subject to global change, with an increasing human pressure (land use, buildings, sand mining, dredging) and increasing population. Improving our knowledge on involved mechanisms and sediment transport processes, monitoring the evolution of sedimentary stocks and anticipating changes in littoral and coastal zones is essential for this purpose. The special issue of Water on “Sediment transport in coastal waters” gathers thirteen papers which introduce the current revolution in the scientific research related to coastal and littoral hydrosedimentary dynamics, and reflect the diversity of concerns on which research in coastal sediment transport is based, and current trends — topics and preferred methods — to address them.

This book focuses on the phenomenon of sediment erosion and resuspension in the Yellow River delta, China, which is a vital issue involved in understanding the sediment transport processes in estuarine and coastal environments, and how these contribute to the nature and distribution of geohazards in the subaqueous Yellow River delta and Bohai Sea. The most important sections of this book will be the detailed physical mechanisms and theoretical models of sediment erosion and resuspension problem fully considering the wave-induced seabed dynamic response to waves, which are particularly useful for postgraduate students and junior researchers entering the discipline of estuary and coastal sedimentation, marine geotechnical engineering, estuary and coastal engineering, harbor and waterway engineering and coastal environmental protection. This book can also serve as a textbook for advanced graduate students of Marine Engineering Geology and Estuarine Sediment Dynamics.

A practical guide to the latest techniques to measure sediments, seabed, water and transport mechanisms in estuaries and coastal waters. Covering a broad range of topics, enough background is included to explain how each technology functions. A review of recent fieldwork experiments demonstrates how modern methods apply in real-life scenarios.

This reference for engineers, and graduate students covers sediment transport and morphodynamics modelling in nearshore environments. It presents the fundamentals required for understanding the physics and for setting up numerical models. This book covers hydrodynamics of estuarine and coastal environments, properties of seafloor and estuarine composition, and hydroenvironmental interactions; emphasising the inter-relations of small- and large-scale processes, and short- and large-evolution timescales. The focus is, principally, on the application of shallow-water theory, but some surface wave models, and coupling of shallow-water models with surface waves is also discussed to some extent. The guidance on running regional models and the case studies presented are directed to managed realignment, coastal protection, climate change impacts, and offshore renewables. Key features: Gives a balanced review of this rich interdisciplinary area Bridges practical engineering and research Offers both large- and small-scale application Suits graduate students and researchers as well as consulting engineers Vanesa Magar is a senior researcher and associate professor at the Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) in Baja California, Mexico. She was formerly a researcher and then a lecturer at Plymouth University, UK.

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.