Download or read book Fluid Mechanical Measurements Within the Boundary Layer Over the Northern California Continental Shelf During STRESS written by and published by . This book was released on 1993 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of the Bottom Boundary Layer on the Northern California Shelf written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time-series measurements of velocity, temperature and conductivity on the northern California shelf during two winter seasons permit an observational test, in vertically integrated form, of a simple set of sub-inertial momentum and heat balances for the bottom boundary layer, which have resulted from recent theoretical work. These are: (1) an along-isobath momentum equation that reduces to a classical Ekman balance; (2) a cross isobath momentum equation in which the Ekman balance is modified by a buoyancy force caused by distortion of the isopycnal surfaces within the boundary layer; and (3) a heat balance in which variability of temperature is produced by cross isobath advection. The measurements confirm the importance of buoyancy in the cross isobath momentum equation, and, as has recently been predicted theoretically, they indicate that buoyancy is a dominant effect when the boundary layer is thick, which typically occurs during downwelling-favorable flows. An Ekman balance describes sub inertial fluctuations in the along-isobath momentum equation with moderate success. The mean along-isobath momentum equation is significantly influenced by a buoyancy force caused by an along-isobath temperature gradient, and along-isobath advection is as important as cross isobath advection in the heat balance. Thus along-isobath variability of temperature, which has been neglected in most theoretical work, is fundamental to the structure of the velocity field and the evolution of the temperature field. The most striking feature of the measurements is a persistent cross isobath mean flow, which is offshore below 20 m above bottom, onshore above 20 m, and uniform above 30 m. The transport produced by this flow, relative to the unsheared flow above 30 m, is much larger than the Ekman transport associated with the mean along-isobath bottom stress.
Download or read book Physical Processes in Estuaries written by Job Dronkers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Transport and Transformation of Contaminants Near the Sediment Water Interface written by Joseph V. DePinto and published by CRC Press. This book was released on 1993-10-13 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport and Transformation of Contaminants Near the Sediment-Water Interface addresses the issue of contaminated bottom sediments and their potential adverse impacts on water quality. This state-of-the-science book covers regulatory management perspectives, physical processes, chemical and biological processes, and process synthesis/modeling. Specific topics discussed include EPA's Sediment Quality Criteria program from a regulatory perspective; flocculation, deposition, and resuspension of fine-grained sediments; approaches for measuring vertical sediment flux near the sediment-water interface; equilibrium models for metal speciation in natural sediments; the partitioning of organic chemicals in bottom sediments; and the development and application of models of sediment and associated contaminant transport in surface waters. The significance of recent studies suggesting that interaction of contaminated bottom sediments with the overlying water play an important role in the long-term recovery of aquatic systems makes Transport and Transformation of Contaminants Near the Sediment-Water Interface essential for water quality engineers, environmental chemists, and environmental toxicologists. The volume provides important information for consultants, regulators, researchers, and graduate students as well.
Download or read book Nearshore Currents Over a Barred Beach written by Antonio Fernando Garcez Faria and published by . This book was released on 1997 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this dissertation is to develop numerical models and compare their predictions with data acquired during the DUCK94 experiment in order to improve our physical understanding of the hydrodynamic processes governing the vertical and cross shore distributions of both longshore and cross shore currents over a barred beach. The vertical structure of the mean longshore current is found to be well described by a logarithmic profile and a relationship between bed shear stress and bottom roughness, including the influence of ripples and mega-ripples, was also found. The vertical structure of the mean cross shore current (undertow) is modeled using an eddy viscosity closure scheme to solve for the turbulent shear stress and includes contributions from breaking wave rollers. These models of the vertical profiles of longshore and cross shore mean currents are combined to formulate a quasi three dimensional model to describe the cross shore distribution of the longshore current. This model includes turbulent mixing due to the cross shore advection of mean momentum of the longshore current by the mean cross shore current and contributions from wave rollers.
Download or read book Chemical Dynamics in Freshwater Ecosystems written by Frank A.P.C. Gobas and published by CRC Press. This book was released on 2018-01-18 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical Dynamics in Freshwater Ecosystems reviews the processes that control the distribution and impacts of chemical substances discharged into freshwater aquatic environments. The book focuses on the relationships between chemical emissions and the resulting ambient concentration in water, sediments, fish, benthos, plants, and other components of real aquatic ecosystems. Hydrodynamics, sediment dynamics, chemical fate processes, bioaccumulation, and food-chain transfer are major topics discussed in the book. Case studies and models are used to illustrate how quantitative predictions of chemical dynamics and behavior in the aquatic environment can be made. Chemical Dynamics in Freshwater Ecosystems is an excellent reference for aquatic toxicologists, wildlife toxicologists, wildlife biologists, environmental chemists, governmental regulators, environmental modelers, consultants, and students studying the effects of chemicals on aquatic environments.
Download or read book Journal of Atmospheric and Oceanic Technology written by and published by . This book was released on 2001 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Global Coastal Ocean Processes and Methods written by Kenneth H. Brink and published by Harvard University Press. This book was released on 2005 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Physical Oceanography written by and published by . This book was released on 2001-07 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estuarine Cohesive Sediment Dynamics written by Ashish J. Mehta and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Global Coastal Ocean written by Allan R. Robinson and published by Harvard University Press. This book was released on 2005 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt: In multidisciplinary efforts to understand and manage our planet, contemporary ocean science plays an essential role. Volumes 13 and 14 of The Sea focus on two of the most important components in the field of ocean science today--the coastal ocean and its interactions with the deep sea, and coupled physical-biogeochemical and ecosystem dynamics.
Download or read book Monthly Weather Review written by and published by . This book was released on 1995 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanisms of Turbulent Mixing in the Continental Shelf Bottom Boundary Layer written by William J. Shaw and published by . This book was released on 2000 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bottom boundary layer is an important dynamical region of shallow water flows. In this thesis, the problem of turbulent mixing in the coastal bottom boundary layer is investigated with a unique set of field measurements of velocity and sound speed that span a significant fraction of the boundary layer obtained over a six-week long period in the late summer of 1996 on the New England shelf. The energetics of the turbulent fluctuations are investigated by testing simplified budgets for turbulent kinetic energy and scalar variance. The turbulent kinetic energy budget is locally balanced while the scalar variance budget is not, probably due to turbulent diffusion. The direct effects of stratification are consistently significant only in the outer part of the boundary layer, where the flux Richardson number is approximately equal to a critical value of 0.2. Turbulence closure is investigated in terms of non-dimensional profiles of velocity and sound speed. Close to the bottom, the results are consistent with Monin-Obukhov similarity theory, while in the outer part of the boundary layer other scales including the height of the boundary layer are important for setting the turbulent length scale.
Download or read book Microstructure of Fine Grained Sediments written by W.A. Chiou and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge of basic clay microstructure is fundamental to an understanding of the physical, chemical, and mechanical properties of fine-grained sediments and rocks. This compilation of fifty-nine peer-reviewed papers examines clay microstructure in detail with comprehensive sections focusing on microstructure signatures, environmental processes, modeling, measurement techniques, and future research recommendations. Many of these topics are discussed in light of geological and engineering applications, such as hazardous waste disposal, construction techniques, and drilling programs. The field of clay microstructure is developing rapidly. The concepts, observations, and principles presented in this book will help stimulate new thought and be a "spring board" for exciting new research.
