Download or read book Temporal and Spatial Variations of Surf Zone Currents and Suspended Sediment Concentration written by and published by . This book was released on 2002 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Temporal and spatial variations of surf-zone currents and suspended sediment concentrations were investigated at the U.S. Army Engineer Research and Development Center's Large-scale Sediment Transport Facility (LSTF). A longshore-uniform fine-sand beach, 35, alongshore, 20 m cross-shore, and 25 cm thick was placed in the facility for these experiments. Two unidirectional, long-crested irregular wave conditions were examined, one resulted in predominantly spilling breakers and one in plunging breakers. Waves and currents, and sediment concentrations were measured at 20 and 16 Hz, respectively, at various longshore and cross-shore locations and throughout the water column. Both currents and sediment concentrations exhibit great temporal and spatial variations in the surf zone. The variation patterns, however, of the longshore current, cross-shore current, and sediment concentration are substantially different. Caution should be exercised when averaging these parameters over time and space. For the two wave cases examined, the temporal variations of longshore current, including those at principal incident-wave frequencies, were relatively small across most of the surf zone. Over 70% of the variations are within approximately plus or minus 60% of the mean value. The wave motion, with a strong peak at principal incident-wave frequencies, dominated the temporal variations of cross-shore current. Temporal variations of suspended sediment concentration under the irregular waves were episodic, characterized by occasional large vales induced by suspension events or due to horizontal advection. The variance of the concentration at the peak incident-wave frequency was not significant except very near the bed.
Download or read book Handbook of Coastal and Ocean Engineering written by Kim Young C and published by World Scientific. This book was released on 1998-05-13 with total page 1776 pages. Available in PDF, EPUB and Kindle. Book excerpt: The handbook contains a comprehensive compilation of topics that are at the forefront of many of the technical advances in ocean waves, coastal, and ocean engineering. More than 110 internationally recognized authorities in the field of coastal and ocean engineering have contributed articles in their areas of expertise to this handbook. These international luminaries are from highly respected universities and renowned research and consulting organizations around the world.
Download or read book Inner surf and Swash zone Hydrodynamics and Sediment Transport Processes During Accretive Conditions and Local Wind Forcing written by Patricia Chardon-Maldonado and published by . This book was released on 2017 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The inner surf and swash zones are highly dynamic regions of the nearshore zone, characterized by unsteady, turbulent, sediment- and bubble-laden flows. Hydrodynamic and sediment transport processes occurring in these zones control sand exchange between the surf zone and foreshore, leading to foreshore morphological variation. Increased scientific interest and technological advances have contributed to the more recent advances in understanding of inner-surf and swash-zone processes. However, there is still the need of near-bed measurements of hydrodynamic and sediment transport to identify the role that small-scale inner-surf and swash-zone processes have on the beach during storm beach recovery (accretive conditions) and mesoscale meteorological phenomena (wind forcing mechanism). Therefore, two field-based studies were conducted to acquire detailed observations to address these needs. First, a field experiment was conducted on a steep sloping beach at South Bethany Beach, Delaware, USA in an attempt to quantify the foreshore morphological change during post-storm recovery. Near-bed, highly resolved hydrodynamic and sediment concentration measurements were collected at five cross-shore locations across the foreshore. Suspended sediment transport rates were estimated using instantaneous measurements of flow velocity and suspended sediment concentrations. A spatial and temporal variation of suspended sediment transport rates across the foreshore was identified. The larger transport events resulted from flow interactions that localized suspension and advection of sediment from the point of bore collapse and deposited landward (mostly by the cross-shore component). Net sediment transport and the associated foreshore morphological change were quantified via cross-shore suspended sediment transport rate gradients and an energetics-based suspended sediment transport model. Net suspended sediment transport rate gradient estimates exceeded by two orders of magnitude the net transport quantified via bathymetric difference over each tidal cycle, highlighting the difficulty of predicting transport processes even under weak accretion conditions. This discrepancy implies that all potential mechanisms that enhance sediment transport (e.g. turbulence generated by swash bores, sediment advection) and complete measurements for the full flow duration and throughout the water column are needed to improve sediment transport rate estimates in the inner-surf and swash zone. However, these analyses served to relate the small-scale processes to large temporal and spatial scale accretive patterns. ☐ A second field study was conducted on a microtidal, low wave energy, sea breeze dominated sandy beach in Sisal, Yucatán, Mexico to investigate the effects of local (land/sea breeze) and synoptic (Norte) scale meteorological events on inner-surf and swash-zone dynamics. Flow velocities and suspended sediment concentrations were measured concurrently at three cross-shore locations. The high-resolution data allowed the quantification of bed shear stress, turbulent dissipation rate and sediment transport rates. The change in wind speed and direction induced pronounced changes to the inner-surf and swash-zone dynamics. Field observations showed that strong inner-surf and swash-zone bed shear stresses, turbulence intensity and sediment suspension occur during sea breezes and Norte. Similarities between cross-shore and alongshore hydrodynamic parameters estimated during sea breezes and the Norte indicate that during sea breezes a significant amount of sediment can be mobilized inducing foreshore morphological changes similar to or greater than the effects generated by a short duration small storm. However, despite the milder energy conditions during land breezes, when these coincide with high tides, the estimated instantaneous hydrodynamic and sediment transport parameters often had similar orders of magnitude to sea breezes. These observations suggest that land breeze, under ideal conditions, can mobilize considerable amounts of sediment across the foreshore.
Download or read book Principles of Tidal Sedimentology written by Richard A. Davis Jr. and published by Springer Science & Business Media. This book was released on 2011-10-20 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive, contemporary review of tidal environments and deposits. Individual chapters, each written by world-class experts, cover the full spectrum of coastal, shallow-marine and even deep-marine settings where tidal action influences or controls sediment movement and deposition. Both siliciclastic and carbonate deposits are covered. Various chapters examine the dynamics of sediment transport by tides, and the morphodynamics of tidal systems. Several chapters explore the occurrence of tidal deposits in the stratigraphic context of entire sedimentary basins. This book is essential reading for both coastal geologists and managers, and geologists interested in extracting hydrocarbons from complex tidal successions.
Download or read book Nonlinear Wave Dynamics written by Patrick Lynett and published by World Scientific. This book was released on 2009 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: In September 2006, research leaders in the field of coastal engineering, fluid mechanics, and wave theory met at Cornell University to celebrate the 60th birthday of Prof. Philip L-F Liu. This volume is a compilation of the research papers presented at the symposium, and includes both review and new research papers. Topics such as nonlinear wave theory, tsunamis, wave-structure interaction, turbulence, and modeling of complex sediment transport are discussed in this volume. All of the contributing authors are research collaborators of Prof. Liu, and include leaders in coastal engineering such as Maarten Dingemans, Hwung-Hweng Hwung, Nobu Kobayashi, Inigo Losada, Hocine Oumeraci, Costas Synolakis, and Harry Yeh.
Download or read book Beach Inlet Interaction and Sediment Management written by Ping Wang and published by Cambridge University Press. This book was released on 2022-09-30 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beaches, barrier islands and tidal inlets are valuable coastal resources and provide desirable environments that are often densely populated. They are dynamic landforms that change constantly, driven by both normal processes and energetic storms. They behave as one interconnected system and must be understood and managed as such. This book discusses their various morphologic features, as well as the processes that shape them and future challenges due to environmental change. A major focus is placed on the interaction between sandy beaches and tidal inlets, and the sediment exchange among various morphologic features. Balancing these valuable sediment resources while maintaining the natural sediment exchange constitutes a major goal of modern shore protection and coastal management. Illustrated with numerous aerial photographs to demonstrate how beaches and tidal inlets interact, this book provides a valuable reference for graduate students, researchers and professionals working in coastal management and geomorphology.
Download or read book Sediment Transport written by Andrew Manning and published by BoD – Books on Demand. This book was released on 2013-03-13 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sediment Transport Processes and their Modelling Applications is a book which covers a wide range of topics. The effective management of many aquatic environments, requires a detailed understanding of sediment dynamics. This has both environmental and economic implications, especially where there is any anthropogenic involvement. Numerical models are often the tool used for predicting the transport and fate of sediment movement in these situations, as they can estimate the various spatial and temporal fluxes. However, the physical sedimentary processes can vary quite considerably depending upon whether the local sediments are fully cohesive, non-cohesive, or a mixture of both types. For this reason for more than half a century, scientists, engineers, hydrologists and mathematicians have all been continuing to conduct research into the many aspects which influence sediment transport. These issues range from processes such as scour, erosion and deposition, to how sediment process observations can be applied in sediment transport modelling frameworks. This book reports the findings from recent research in applied sediment transport which has been conducted in a wide range of aquatic environments. The research was carried out by researchers who specialise in the transport of sediments and related issues.
Download or read book Annual Report written by National Sea Grant College Program (U.S.) and published by . This book was released on 1989 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sediment Dynamics in Changing Environments written by IAHS International Commission on Continental Erosion. Symposium and published by Iahs Press. This book was released on 2008 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Grant Abstracts written by and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coastal Engineering 2008 In 5 Volumes Proceedings Of The 31st International Conference written by Jane Mckee Smith and published by World Scientific. This book was released on 2009-05-05 with total page 5136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings contains papers presented at the 31st International Conference on Coastal Engineering, which has held in Hamburg, Germany (31 August - 5 September 2008). The proceeding is divided into five parts: Waves; Long Waves, Nearshore Currents, and Swash; Sediment Transport and Morphology; Coastal Management, Environment, and Risk; and Coastal Structures. The papers cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2008 provides coastal engineers, scientists, and planners, with state-of-the-art information on coastal engineering and coastal processes.
Download or read book Surf Zone Properties and On offshore Sediment Transport written by Wei-Chong Yang and published by . This book was released on 1982 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The surf zone properties and the on/offshore sediment transport rate were studied. A non-dimensional surf zone parameter was obtained by taking the ratio of natural swash period to wave period. This parameter, in addition to its wide application in describing the breaker types, was pertinent to describing the flow patterns in surf zone and defining the region of validity of the similarity solutions. A similarity model was applied to describe the flow field of breaking waves in surf zone. Laboratory results from other investigators and those obtained in the present study were used to test the validity of the proposed model. (Author).
Download or read book The Proceedings Of The Coastal Sediments 2015 written by Jun Cheng and published by World Scientific. This book was released on 2015-04-23 with total page 3129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Proceedings contains over 260 papers on cutting-edge research presented at the eighth international Symposium on Coastal Sediment Processes, held May 11 - 15, 2015, in San Diego, California, 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 the theme of Understanding and Working with Nature.Focusing on the physical aspects of the sediment processes in various coastal environments, this Proceedings provides findings from the latest research and newest engineering applications. Sessions covered a wide range of topics including barrier islands, beaches, climate and sea level, cohesive and noncohesive sediments, coastal bluffs, coastal marsh, dredged sediments, inlet and navigation channels, regional sediment management, river deltas, shore protection, tsunamis, and vegetation-sediment interaction. Several special sessions included: Relevant science for changing coastlines: A Tribute to Gary Griggs; North Atlantic Coast Comprehensive Study and post-super-storm Sandy work; long-term coastal evolution; barrier islands of Louisiana; sea-level rise and super storms in a warming world; predicting decadal coastal geomorphic evolution; and contrasting Pacific coastal behavior with El Niño Southern Oscillation (ENSO), are also featured.
Download or read book Shore Protection Manual written by and published by . This book was released on 1984 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Treatise on Geomorphology written by and published by Academic Press. This book was released on 2013-02-27 with total page 6392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The changing focus and approach of geomorphic research suggests that the time is opportune for a summary of the state of discipline. The number of peer-reviewed papers published in geomorphic journals has grown steadily for more than two decades and, more importantly, the diversity of authors with respect to geographic location and disciplinary background (geography, geology, ecology, civil engineering, computer science, geographic information science, and others) has expanded dramatically. As more good minds are drawn to geomorphology, and the breadth of the peer-reviewed literature grows, an effective summary of contemporary geomorphic knowledge becomes increasingly difficult. The fourteen volumes of this Treatise on Geomorphology will provide an important reference for users from undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic. Information on the historical development of diverse topics within geomorphology provides context for ongoing research; discussion of research strategies, equipment, and field methods, laboratory experiments, and numerical simulations reflect the multiple approaches to understanding Earth’s surfaces; and summaries of outstanding research questions highlight future challenges and suggest productive new avenues for research. Our future ability to adapt to geomorphic changes in the critical zone very much hinges upon how well landform scientists comprehend the dynamics of Earth’s diverse surfaces. This Treatise on Geomorphology provides a useful synthesis of the state of the discipline, as well as highlighting productive research directions, that Educators and students/researchers will find useful. Geomorphology has advanced greatly in the last 10 years to become a very interdisciplinary field. Undergraduate students looking for term paper topics, to graduate students starting a literature review for their thesis work, and professionals seeking a concise summary of a particular topic will find the answers they need in this broad reference work which has been designed and written to accommodate their diverse backgrounds and levels of understanding Editor-in-Chief, Prof. J. F. Shroder of the University of Nebraska at Omaha, is past president of the QG&G section of the Geological Society of America and present Trustee of the GSA Foundation, while being well respected in the geomorphology research community and having won numerous awards in the field. A host of noted international geomorphologists have contributed state-of-the-art chapters to the work. Readers can be guaranteed that every chapter in this extensive work has been critically reviewed for consistency and accuracy by the World expert Volume Editors and by the Editor-in-Chief himself No other reference work exists in the area of Geomorphology that offers the breadth and depth of information contained in this 14-volume masterpiece. From the foundations and history of geomorphology through to geomorphological innovations and computer modelling, and the past and future states of landform science, no "stone" has been left unturned!
Download or read book River Coastal and Estuarine Morphodynamics RCEM 2009 Two Volume Set written by Carlos Vionnet and published by CRC Press. This book was released on 2018-10-03 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal, estuarine, fluvial and submarine morphodynamics encompass some of the leading processes shaping our planet. They stem mainly, but not only, from the interaction of water in motion and movable sediment boundaries, resulting in morphological changes produced by erosion, transport and deposition of sediments that generate a variety of landsca
Download or read book Coastal and Shelf Sediment Transport written by Peter S. Balson and published by Geological Society of London. This book was released on 2007 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a timely review of a representative selection of the different approaches undertaken for coastal and shelf investigations, operating at a variety of temporal and spatial scales, within different regions of the UK/European continental shelf, and elsewhere.
