Dispersal of Fine Sediment in the Coastal Ocean: Sensitivity to Aggregation and Stratification
Dispersal of Fine Sediment in the Coastal Ocean: Sensitivity to Aggregation and Stratification

Author:

Publisher:

Published: 2008

Total Pages: 11

ISBN-13:

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By improving numerical representations of coastal circulation, sediment properties, and waves, we seek to develop reliable estimates of sediment concentration, transport and deposition. Efforts to include sediment transport calculations within three-dimensional numerical hydrodynamic models can increase our ability to predict suspended sediment concentrations, water column turbidity, and seabed characteristics. Predicting the dispersal of fine grained material (silts and clays) is especially critical, because they often dominate fluvial input to the coastal ocean, and control light attenuation and backscatter there. Transport of fines is difficult to predict, however, because their hydrodynamic properties vary in response to bed consolidation and repackaging as particle aggregates. Calculations of sediment concentrations are extremely sensitive to the settling velocity of such particles, which can vary over an order of magnitude, depending on aggregate size and density. The vertical dispersal of particles also responds to stratification induced by concentration gradients of suspended sediments, which is usually neglected or poorly resolved in three-dimensional models.

Biogeochemical Dynamics at Major River-Coastal Interfaces
Biogeochemical Dynamics at Major River-Coastal Interfaces

Author: Thomas Bianchi

Publisher: Cambridge University Press

Published: 2014

Total Pages: 673

ISBN-13: 1107022576

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A comprehensive, state-of-the-art synthesis of biogeochemical dynamics and the impact of human alterations at major river-coastal interfaces for advanced students and researchers.

Managing Wastewater in Coastal Urban Areas
Managing Wastewater in Coastal Urban Areas

Author: National Research Council

Publisher: National Academies Press

Published: 1993-02-01

Total Pages: 497

ISBN-13: 0309048265

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Close to one-half of all Americans live in coastal counties. The resulting flood of wastewater, stormwater, and pollutants discharged into coastal waters is a major concern. This book offers a well-delineated approach to integrated coastal management beginning with wastewater and stormwater control. The committee presents an overview of current management practices and problems. The core of the volume is a detailed model for integrated coastal management, offering basic principles and methods, a direction for moving from general concerns to day-to-day activities, specific steps from goal setting through monitoring performance, and a base of scientific and technical information. Success stories from the Chesapeake and Santa Monica bays are included. The volume discusses potential barriers to integrated coastal management and how they may be overcome and suggests steps for introducing this concept into current programs and legislation. This practical volume will be important to anyone concerned about management of coastal waters: policymakers, resource and municipal managers, environmental professionals, concerned community groups, and researchers, as well as faculty and students in environmental studies.

The Ocean and Cryosphere in a Changing Climate
The Ocean and Cryosphere in a Changing Climate

Author: Intergovernmental Panel on Climate Change (IPCC)

Publisher: Cambridge University Press

Published: 2022-04-30

Total Pages: 755

ISBN-13: 9781009157971

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The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for assessing the science related to climate change. It provides policymakers with regular assessments of the scientific basis of human-induced climate change, its impacts and future risks, and options for adaptation and mitigation. This IPCC Special Report on the Ocean and Cryosphere in a Changing Climate is the most comprehensive and up-to-date assessment of the observed and projected changes to the ocean and cryosphere and their associated impacts and risks, with a focus on resilience, risk management response options, and adaptation measures, considering both their potential and limitations. It brings together knowledge on physical and biogeochemical changes, the interplay with ecosystem changes, and the implications for human communities. It serves policymakers, decision makers, stakeholders, and all interested parties with unbiased, up-to-date, policy-relevant information. This title is also available as Open Access on Cambridge Core.

Oil in the Sea III
Oil in the Sea III

Author: National Research Council

Publisher: National Academies Press

Published: 2003-03-14

Total Pages: 278

ISBN-13: 0309084385

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Since the early 1970s, experts have recognized that petroleum pollutants were being discharged in marine waters worldwide, from oil spills, vessel operations, and land-based sources. Public attention to oil spills has forced improvements. Still, a considerable amount of oil is discharged yearly into sensitive coastal environments. Oil in the Sea provides the best available estimate of oil pollutant discharge into marine waters, including an evaluation of the methods for assessing petroleum load and a discussion about the concerns these loads represent. Featuring close-up looks at the Exxon Valdez spill and other notable events, the book identifies important research questions and makes recommendations for better analysis ofâ€"and more effective measures againstâ€"pollutant discharge. The book discusses: Inputâ€"where the discharges come from, including the role of two-stroke engines used on recreational craft. Behavior or fateâ€"how oil is affected by processes such as evaporation as it moves through the marine environment. Effectsâ€"what we know about the effects of petroleum hydrocarbons on marine organisms and ecosystems. Providing a needed update on a problem of international importance, this book will be of interest to energy policy makers, industry officials and managers, engineers and researchers, and advocates for the marine environment.

Physical Processes in Estuaries
Physical Processes in Estuaries

Author: Job Dronkers

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 556

ISBN-13: 3642736912

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In Physical Processes in Estuaries the present day knowledge of the physics of transport phenomena in estuaries and their mathematical treatment is summarized: It is divided into following parts: - Water movements in estuaries - Estuarine fronts and river plumes - Internal waves and interface stability - Fine sediment transport, aggregation of particles, settling velocity of mud flocs - Sedimentation and erosion of fine sediments. For each topic an up-to-date review and recommendations for future research are given, followed by results of original studies. Since estuarine environments are the first to be threatened by urbanization and industrial exploitation this book is an important tool for students and researchers of environmental problems as well as for consultants and water authorities.

Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms
Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms

Author: Babin, Marcel

Publisher: UNESCO

Published: 2008-06-05

Total Pages: 880

ISBN-13: 9231040421

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The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.

Dynamics of Marine Sands
Dynamics of Marine Sands

Author: Richard Soulsby

Publisher: Thomas Telford

Published: 1997

Total Pages: 280

ISBN-13: 9780727725844

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The practical engineer looking for an urgent solution to a sediment-related project often finds that the results of the relevant academic research are published in unfamiliar language in publications that are not easily available. Dynamics of marine sands bridges the gap between academic research and practical applications by summarising the research results in a unified form, backed up with worked examples and case studies. This comprehensive new book presents methods for calculating the various hydrodynamic and sediment dynamic quantities necessary for marine sediment transport applications, and recommends the most appropriate methods to use for engineering projects.