Multiple Scales Of Suspended Sediment Dynamics In A Complex Geometry Estuary

Author : Fernanda Minikowski Achete
Publisher : CRC Press
Page : 201 pages
File Size : 50,9 Mb
Release : 2020-04-22
Category : Science
ISBN : 9780429605987

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Multiple Scales of Suspended Sediment Dynamics in a Complex Geometry Estuary by Fernanda Minikowski Achete Pdf

Many estuaries are located in urbanized, highly engineered environments. Cohesive sediment plays an important role due to its link with estuarine health and ecology. An important ecological parameter is the suspended sediment concentration (SSC) translated into turbidity levels and sediment budget. This study contributes to investigate and forecast turbidity levels and sediment budget variability at San Francisco Bay-Delta system at a variety of spatial and temporal scales applying a flexible mesh process-based model (Delft3D FM). It is possible to have a robust sediment model, which reproduces 90% of the yearly data derived sediment budget, with simple model settings, like applying one mud fraction and a simple bottom sediment distribution. This finding opens the horizon for modeling less monitored estuaries. Comparing two case studies, i.e. the Sacramento-San Joaquin Delta and Alviso Slough, a classification for estuaries regarding the main sediment dynamic forcing is proposed: event-driven estuary (Delta) and tide-driven estuary (Alviso Slough). In the event-driven estuaries, the rivers are the main sediment source and the tides have minor impact in the net sediment transport. In the tide-driven estuaries, the main sediment source is the bottom sediment and the tide asymmetry defines the net sediment transport. This research also makes advances in connecting different scientific fields and developing a managerial tool to support decision making. It provides the basis to a chain of models, which goes from the hydrodynamics, to suspended sediment, to phytoplankton, to fish, clams and marshes.

Author : Fernanda Achete
Publisher : CRC Press
Page : 157 pages
File Size : 43,7 Mb
Release : 2020-04-22
Category : Science
ISBN : 9780429611506

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Multiple Scales of Suspended Sediment Dynamics in a Complex Geometry Estuary by Fernanda Achete Pdf

Many estuaries are located in urbanized, highly engineered environments. Cohesive sediment plays an important role due to its link with estuarine health and ecology. An important ecological parameter is the suspended sediment concentration (SSC) translated into turbidity levels and sediment budget. This study contributes to investigate and forecast turbidity levels and sediment budget variability at San Francisco Bay-Delta system at a variety of spatial and temporal scales applying a flexible mesh process-based model (Delft3D FM). It is possible to have a robust sediment model, which reproduces 90% of the yearly data derived sediment budget, with simple model settings, like applying one mud fraction and a simple bottom sediment distribution. This finding opens the horizon for modeling less monitored estuaries. Comparing two case studies, i.e. the Sacramento-San Joaquin Delta and Alviso Slough, a classification for estuaries regarding the main sediment dynamic forcing is proposed: event-driven estuary (Delta) and tide-driven estuary (Alviso Slough). In the event-driven estuaries, the rivers are the main sediment source and the tides have minor impact in the net sediment transport. In the tide-driven estuaries, the main sediment source is the bottom sediment and the tide asymmetry defines the net sediment transport. This research also makes advances in connecting different scientific fields and developing a managerial tool to support decision making. It provides the basis to a chain of models, which goes from the hydrodynamics, to suspended sediment, to phytoplankton, to fish, clams and marshes.

Author : Gary Parker,Marcelo H. Garcia
Publisher : CRC Press
Page : 1281 pages
File Size : 42,8 Mb
Release : 2005-09-29
Category : Technology & Engineering
ISBN : 9781439833896

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River, Coastal and Estuarine Morphodynamics by Gary Parker,Marcelo H. Garcia Pdf

The proceedings of the 4th Symposium on River, Coastal and Estuarine Morphodynamics offers the latest research results concerning quantitative modelling of the interaction of water and sediment and the shapes this interaction makes in rivers, watersheds, estuaries, the coast, the continental shelf and the deep sea. Morphodynamics is the study of the evolution of landscape and seascape features, from small scale to large.

Author : Ashish J. Mehta
Publisher : Springer Science & Business Media
Page : 480 pages
File Size : 51,8 Mb
Release : 2013-03-07
Category : Science
ISBN : 9781461249368

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Estuarine Cohesive Sediment Dynamics by Ashish J. Mehta Pdf

The background for the Workshop on Cohesive Sediment Dynamics - . !!!!!. Special Reference to Physical Processes in Estuaries is briefly outlined in Chapter I. Here I wish to acknowledge those whose support I consider to be pivotal to this under taking. My deepest appreciation goes to Cynthia Vey, whose organizational skills and dedicated effort made the completion of this volume possible. Thanks are also due to Gail Terry for workshop organization, Jean Branson for word processing and Lillean Pieter for helping with drawings. Finally, I must express my sincere appreciation to Arthur Ezra 9f the National Science Foundation for providing support (through Grant No. CEE-8401185) for the workshop, and to Hsiang Wang for depart mental encouragement. With deepest regret, I must note the untimely death of Ranjan Ariathurai, 39, on June 5, 1985, before this volume could be published. He was a guiding force to many within the small group of researchers in cohesive sediment dynamics, and his professional brilliance and inspirational personal qualities constituted the true spirit . behind the workshop. I trust this volume will serve, albeit in a small way, as a fitting memory to this spirit, and to the remarkable professional contributions Ranjan made during his short career. Professor Ray B. Krone Professor Emmanuel Partheniades Department of Civil Engineering Department of Engineering Sciences University of California University of Florida Davis, California Gainesville, Florida TABLE OF CONTENTS CHAPTER PAGE I. INTRODUCTION Ashish J. Mehta •••••••••••••••••••••••••••••••••••••••••••••••••••• 1 II.

Author : Richard Whitehouse
Publisher : Thomas Telford
Page : 240 pages
File Size : 49,7 Mb
Release : 2000-11-03
Category : Nature
ISBN : 0727728644

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Dynamics of Estuarine Muds by Richard Whitehouse Pdf

The ability to predict the movement of cohesive sediment within coastal, estuarine or inland waters has a significant economic and ecological importance in the development of new engineering works and the maintenance of existing installations. Dynamics of estuarine muds clearly describes the most up-to-date developments in this field and contains information about improved procedures and how they can be applied to a variety of engineering projects. Drawing on a wide range of new data and new concepts in mud research, this concise volume presents the main processes of cohesive sediment behaviour, namely, erosion, transport, deposition and consolidation. It includes subsections on Knowledge, intended to show the practising engineer which parameters are important in each of the processes and Procedure, which will enable broad estimates of erosion, transport, deposition and consolidation to be made based on knowledge of the site conditions. Dynamics of estuarine muds is essential reading for the practising engineer who is involved in coastal, estuarine or inland water construction. A companion volume to Dynamics of marine sands, this excellent book provides invaluable information about this complex topic in a readily accessible manner.

Author : Adam Bezuijen,Haike van Lottum
Publisher : CRC Press
Page : 1306 pages
File Size : 51,8 Mb
Release : 2005-12-22
Category : Technology & Engineering
ISBN : 0415392705

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Tunnelling. A Decade of Progress. GeoDelft 1995-2005 by Adam Bezuijen,Haike van Lottum Pdf

Following years of research, the first bored tunnel in soft soil in the Netherlands, the Tweede Heinenoord tunnel, was completed in 1998. Since then, Dutch engineers have increased their knowledge of soft soil tunnelling, with a significant and important part of this research being carried out by GeoDelft, the Dutch National Institute of Geo-Engineering. This book contains the most important publications by GeoDelft on the subject of soft soil tunnelling, focusing on the period from 1992 to the present, it is divided into four main headings: field measurements; grout behaviour; model testing; and numerical analysis. This impressive overview of the progress made in the Netherlands in soft soil tunnelling research over more than a decade is a valuable resource to those working in soft soil tunnelling worldwide.

Author : Carlos Vionnet,Marcelo H. Garcia,E.M. Latrubesse,G.M.E. Perillo
Publisher : CRC Press
Page : 1116 pages
File Size : 49,5 Mb
Release : 2018-10-03
Category : Science
ISBN : 9781482266603

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River, Coastal and Estuarine Morphodynamics. RCEM 2009, Two Volume Set by Carlos Vionnet,Marcelo H. Garcia,E.M. Latrubesse,G.M.E. Perillo Pdf

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

Author : Neik K. Ganju
Publisher : Unknown
Page : 40 pages
File Size : 48,9 Mb
Release : 2006
Category : Sediment transport
ISBN : UCR:31210024993063

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Development of a Decadal-scale Estuarine Geomorphic Model for Suisun Bay, California by Neik K. Ganju Pdf

Author : Keith R. Dyer
Publisher : Unknown
Page : 368 pages
File Size : 48,8 Mb
Release : 1986-05-06
Category : Science
ISBN : UCSD:31822002229896

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Coastal and Estuarine Sediment Dynamics by Keith R. Dyer Pdf

Covers the movement of mud, sand, and gravel on the continental shelf in the nearshore zone, on beaches, and in estuaries. A multi-disciplinary treatment integrating marine geology, oceanography, and engineering. Presents concepts in engineering sediment distribution patterns that improve the prediction of erosion and deposition rates. Reviews background material as well as the results of recent research.

Author : Henry J. Bokuniewicz,Richard P. Signell
Publisher : MDPI
Page : 434 pages
File Size : 53,7 Mb
Release : 2018-10-02
Category : Electronic book
ISBN : 9783038420460

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Selected Papers from the 13th Estuarine and Coastal Modeling Conference by Henry J. Bokuniewicz,Richard P. Signell Pdf

This book is a printed edition of the Special Issue "Selected Papers from the 13th Estuarine and Coastal Modeling Conference" that was published in JMSE

Author : David Prandle
Publisher : Cambridge University Press
Page : 249 pages
File Size : 41,9 Mb
Release : 2009-01-22
Category : Nature
ISBN : 9780521888868

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Estuaries by David Prandle Pdf

A reference volume discussing the dynamics, mixing, sediment regimes and morphological evolution in estuaries for researchers, students and engineers.

Author : Vo Quoc Thanh
Publisher : CRC Press
Page : 159 pages
File Size : 47,9 Mb
Release : 2021-06-01
Category : Science
ISBN : 9781000416336

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Modeling of Hydrodynamics and Sediment Transport in the Mekong Delta by Vo Quoc Thanh Pdf

This research aims to investigate the prevailing sediment dynamics and the sediment budget in the Mekong Delta by using a process-based model. Understanding sediment dynamics for the Mekong Delta requires high resolution analysis and detailed data, which is a challenge for managers and scientists. This study introduces such an approach and focuses on modeling the entire system with a process-based approach with Delft3D-4 and Delft3D Flexible Mesh (DFM). The first model is used to explore sediment dynamics at the coastal zone. The latter model allows straightforward coupling of 1D and 2D grids, making it suitable for analyzing the complex river and canal network of the Mekong Delta. The validated model suggests that the Mekong Delta receives ~99 Mt/year sediment from the Mekong River. This is much lower than the common estimate of 160 Mt/year. Only about 23% of the modelled total sediment load at Kratie is exported to the sea. The remaining portion is trapped in the rivers and floodplains of the Mekong Delta. The results advance understanding of sediment dynamics and sediment budget in the Mekong Delta. As such the model is an efficient tool to support delta management and planning.

Author : Henk Schuttelaars,Arnold Heemink,Eric Deleersnijder
Publisher : Springer Nature
Page : 324 pages
File Size : 55,8 Mb
Release : 2022-11-30
Category : Mathematics
ISBN : 9783031095597

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The Mathematics of Marine Modelling by Henk Schuttelaars,Arnold Heemink,Eric Deleersnijder Pdf

Over the past few decades, numerical simulation has become instrumental in understanding the dynamics of seas, coastal regions and estuaries. The decision makers rely more and more frequently on model results for the management of these regions. Some modellers are insufficiently aware of the theoretical underpinning of the simulation tools they are using. On the other hand, a number of applied mathematicians tend to view marine sciences as a domain in which they would like to use the tools they have a good command of. Bridging the gap between model users and applied mathematicians is the main objective of the present book. In this respect a vast number of issues in which mathematics plays a crucial role will be addressed.

Author : Rui M.L. Ferreira,Elsa C.T.L. Alves,Joao G.A.B. Leal,Antonio H. Cardoso
Publisher : CRC Press
Page : 2304 pages
File Size : 42,8 Mb
Release : 2006-09-14
Category : Science
ISBN : 9781439833865

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River Flow 2006, Two Volume Set by Rui M.L. Ferreira,Elsa C.T.L. Alves,Joao G.A.B. Leal,Antonio H. Cardoso Pdf

Rivers are complex entities. In addition to being valuable wildlife habitats, they support human activities by providing water for human usage, renewable energy and convenient transportation. Rivers may also pose threats to riverine communities, in the form of floods and other natural or man-induced hazards. Contemporary societies recognize their responsibility in ensuring the sustainable use of rivers and in preserving river’s intrinsic ecological and landscape values. This obligation is often in conflict with riverine economical exploitation and with risk management concerns. As a discipline, Fluvial Hydraulics makes a significant contribution to the development of strategies for sustainable river use by providing new modelling tools and engineering techniques based on advances in phenomenological understanding and in computational modelling. River Flow 2006 comprises the Proceedings of the third edition of the International Conference on Fluvial Hydraulics, organized under the auspices of the Fluvial Hydraulics Section of the International Association of Hydraulic Engineering and Research (IAHR). The book covers issues such as river hydrodynamics, morphodynamics and sediment transport. Other contributions describe interdisciplinary approaches and experiences, particularly regarding interfacial activities involving environmental sciences and information technologies. River Flow 2006 contains the most recent theoretical accomplishments, numerical developments, experimental investigations and field studies in Fluvial Hydraulics. It is an excellent resource for researchers, civil and environmental engineers, and practitioners in river-related disciplines.

Author : Yuanyang Wan
Publisher : CRC Press
Page : 195 pages
File Size : 47,6 Mb
Release : 2018-09-27
Category : Electronic
ISBN : 1138373338

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Multiscale Physical Processes of Fine Sediment in an Estuary by Yuanyang Wan Pdf

Estuaries are natural highly dynamic and rapidly changing systems, comprising a complex combination of physical processes on many different time- and space- scales. The research conducted a systematic study on the topic of fine sediment physical processes in a meso-tidal convergent alluvial estuary. By means of multi-approaches (field survey, laboratory experiment and numerical modeling) and from multi-angles (data-driven analysis and process-based modeling) we highlight that multiscale (including micro- and macro- scale) physical processes jointly characterize the current and sediment regime in a fine sediment estuarine system. The study presented in this book investigates micro- and macro- scale physical processes of a large-scale fine sediment estuarine system with a moderate tidal range as well as a highly seasonal-varying freshwater inflow. Based on a series of measured, experimented and modelled data, the research highlights that (i) along-channel fresh-salt gradient near an estuarine turbidity maximum zone is a key parameter controlling local density stratification and sedimentation in the channel; (ii) the salinity-induced baroclinic pressure gradient forces are a major factor impacting internal velocity and suspended sediment concentration (SSC) structures; (iii) vertical profiles of current, salinity and SSC within a river plume are dependent on a correct prediction of the development of turbulence; (iv) both suspended particulate matter availability and local residual flow regime are of critical importance for trapping probability of sediment and the occurrence of fluid mud; (v) river discharge impacts the horizontal and vertical distribution of residual current; (vi) seasonally varying wind effect alters the residual currents near the riverine limit; (vii) seasonally varied mean sea level and wind climate jointly shape the saltwater intrusion length near the estuarine front.