Cohesive Sediments

Cohesive Sediments
Author: Neville Burt
Publisher:
Total Pages: 490
Release: 1997-04-03
Genre: Science
ISBN:
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There is an alarming tendency today to assume that something calculated by a computer must be correct, yet the phrase 'garbage in, garbage out' (gigo) is possibly nowhere more (generally) appropriate than in computer modelling of cohesive sediment behaviour. The behaviour of 'mud' is highly complex and one only needs to look at a sample under a microscope to see why - the variety of particle shapes, not to mention the presence of living organisms, make it a substance with properties virtually unique to its situation which even change with time. For many years most researchers tended to avoid it, preferring to study sand and gravel, but a dedicated few tackled it and found a forum for discussing their work in the first Cohesive Sediments Workshop in Florida in 1980. The workshop met about every three years resulting in publication of some of the most definitive papers on the subject. By 1994 it was time to recognise the extensive research being carried on in Europe by holding the workshop in that region. Intercoh '94 (the 4th Nearshore and Estuarine Cohesive Sediment Transport Conference) drew together about 100 of the world's leading researchers in the field. The resulting papers, presented in this volume, truly represent the definitive state of the art on the measurement and modelling of mud properties today.

Cohesive Sediments in Open Channels

Cohesive Sediments in Open Channels
Author: Emmanuel Partheniades
Publisher: Butterworth-Heinemann
Total Pages: 375
Release: 2009-04-23
Genre: Science
ISBN: 0080877974
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Control the impact of cohesive sediments on open channels by managing the effects of silt, clay and other sediments in harbors, estuaries and reservoirs. Cohesive Sediments in Open Channels provides you with a practical framework for understanding how cohesive sediments are transported, deposited and eroded. One of the first books to approach the subject from an engineering's perspective, this book supplies insight into applying hydraulic design as well as understanding the behavior of cohesive sediments in a flow field. - Properties and of the nature and the origin of the interparticle physicochemical forces - The forces between clay particles and the process of flocculation - Processes and dynamics of flocculation and the hydrodynamic behavior of cohesive sediments - Transport processes of sediments by flowing water and related equations are first presented and explained - Deposition and resuspension of beds deposited from suspension from flowing waters - Engineering applications of the hydraulics of cohesive sediments

Sedimentary Dynamics of Windfield-Source-Basin System

Sedimentary Dynamics of Windfield-Source-Basin System
Author: Zaixing Jiang
Publisher: Springer
Total Pages: 341
Release: 2018-03-06
Genre: Science
ISBN: 9811074070
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This book introduces the geological concept of the “windfield-source-basin system,” based on integrated modern and ancient sedimentology studies. It identifies wind field as a main sedimentation-controlling factor that combines with provenance and basin dynamics to determine the formation and distribution of depositional systems. Using the unary properties of facies, sedimentary models and the duality properties of source-to-sink approaches, the concept of a “wind-source-basin system” introduces the “sedimentary system trinity”: wind field, provenance and basin properties. “Wind-source-basin systems” provide more plausible genetic interpretations of depositional systems (including both continental and marine facies, and clastic and carbonate systems), as well as more comprehensive and precise predictions of depositional systems (hydrocarbon reservoirs) in unknown regions. Further, the book proposes a series of methods on paleowind field reconstruction, which fill the gaps in paleo-atmospheric field studies in paleoclimatology, and shows that allocating relationships among source-reservoir-cap in petroliferous basins are limited by the “wind-source-basin system”. This trinity system also provides a new perspective on petroleum geology assessment. The book appeals to all those engaged in sedimentology, petroleum geology and climatology studies.

Sediment Dynamics and Pollutant Mobility in Rivers

Sediment Dynamics and Pollutant Mobility in Rivers
Author: Bernd Westrich
Publisher: Springer Science & Business Media
Total Pages: 463
Release: 2007-10-11
Genre: Science
ISBN: 3540347852
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This is the first interdisciplinary book on the mobilization of nutrients and pollutants in the water phase due to hydrodynamic processes. Coverage includes the formation of aggregates in turbulent water; flocks and biofilms from organic reactions; and the formation of new surfaces for re-adsorption of dissolved pollutants. The book gathers papers resulting from an International Symposium on Sediment Dynamics and Pollutant Mobility in River Basins in Hamburg, Germany, March, 2006.

Multiple Scales of Suspended Sediment Dynamics in a Complex Geometry Estuary

Multiple Scales of Suspended Sediment Dynamics in a Complex Geometry Estuary
Author: Fernanda Achete
Publisher: CRC Press
Total Pages: 157
Release: 2020-04-22
Genre: Science
ISBN: 0429611501
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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.

Introduction to the Physics of Cohesive Sediment Dynamics in the Marine Environment

Introduction to the Physics of Cohesive Sediment Dynamics in the Marine Environment
Author: Johan C. Winterwerp
Publisher: Elsevier
Total Pages: 577
Release: 2004-08-20
Genre: Science
ISBN: 0080473733
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This book is an introduction to the physical processes of cohesive sediment in the marine environment. It focuses on highly dynamic systems, such as estuaries and coastal seas. Processes on the continental shelf are also discussed and attention is given to the effects of chemistry, biology and gas.The process descriptions are based on hydrodynamic and soil mechanic principles, which integrate at the soil-water interface. This approach is substantiated through a classification scheme of sediment occurrences in which distinction is made between cohesive and granular material. Emphasis is also placed on the important interactions between turbulent flow and cohesive sediment suspensions, and on the impact of flow-induced forces on the stability of the seabed. An overview of literature on cohesive sediment dynamics is presented and a number of new developments are highlighted, in particular in relation to floc formation, settling and sedimentation, consolidation, bed failure and liquefaction and erosion of the bed. Moreover, it presents a summary on methods and techniques to measure the various sediment properties necessary to quantify the various parameters in the physical-mathematical model descriptions. A number of examples and case studies have been included.

Encyclopedia of Coastal Science

Encyclopedia of Coastal Science
Author: M. Schwartz
Publisher: Springer Science & Business Media
Total Pages: 1243
Release: 2006-11-08
Genre: Science
ISBN: 1402038801
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This new Encyclopedia of Coastal Science stands as the latest authoritative source in the field of coastal studies, making it the standard reference work for specialists and the interested lay person. Unique in its interdisciplinary approach. This Encyclopedia features contributions by 245 well-known international specialists in their respective fields and is abundantly illustrated with line-drawings and photographs. Not only does this volume offer an extensive number of entries, it also includes various appendices, an illustrated glossary of coastal morphology and extensive bibliographic listings.

Deepwater Sedimentary Systems

Deepwater Sedimentary Systems
Author: Jon R. Rotzien
Publisher: Elsevier
Total Pages: 808
Release: 2022-08-18
Genre: Science
ISBN: 0323919219
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Deepwater Sedimentary Systems: Science, Discovery and Applications helps readers identify, understand and interpret deepwater sedimentary systems at various scales – both onshore and offshore. This book describes the best practices in the integration of geology, geophysics, engineering, technology and economics used to inform smart business decisions in these diverse environments. It draws on technical results gained from deepwater exploration and production drilling campaigns and global field analog studies. With the multi-decadal resilience of deepwater exploration and production and the nature of its inherent uncertainty, this book serves as the essential reference for companies, consultancies, universities, governments and deepwater practitioners around the world seeking to understand deepwater systems and how to explore for and produce resources in these frontier environments. From an academic perspective, readers will use this book as the primer for understanding the processes, deposits and sedimentary environments in deep water – from deep oceans to deep lakes. This book provides conceptual approaches and state-of-the-art information on deepwater systems, as well as scenarios for the next 100 years of human-led exploration and development in deepwater, offshore environments. The students taught this material in today's classrooms will become the leaders of tomorrow in Earth's deepwater frontier. This book provides a broad foundation in deepwater sedimentary systems. What may take an individual dozens of academic and professional courses to achieve an understanding in these systems is provided here in one book. - Presents a holistic view of how subsurface and engineering processes work together in the energy industry, bringing together contributions from the various technical and engineering disciplines - Provides diverse perspectives from a global authorship to create an accurate picture of the process of deepwater exploration and production around the world - Helps readers understand how to interpret deepwater systems at various scales to inform smart business decisions, with a significant portion of the workflows derived from the upstream energy industry