Dispersion In Tidal Estuaries
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Dispersion In Tidal Estuaries
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Author : Paul Jacques Huiswaard
language : en
Publisher:
Release Date : 1959
Dispersion In Tidal Estuaries written by Paul Jacques Huiswaard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Estuaries categories.
Dispersion In Tidal Estuaries
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Author : P. J. Huiswaard
language : en
Publisher:
Release Date : 1959
Dispersion In Tidal Estuaries written by P. J. Huiswaard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Diffusion in hydrology categories.
A Reassessment Of The Role Of Tidal Dispersion In Estuaries And Bays
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Author : W. Rockwell Geyer
language : en
Publisher:
Release Date : 1992
A Reassessment Of The Role Of Tidal Dispersion In Estuaries And Bays written by W. Rockwell Geyer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Dispersion And Tidal Dynamics Of Channel Shoal Estuaries
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Author : Christopher Dean Holleman
language : en
Publisher:
Release Date : 2013
Dispersion And Tidal Dynamics Of Channel Shoal Estuaries written by Christopher Dean Holleman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Estuaries, and the varied ecosystems they support, are affected by human action in many ways. One of the fundamental environmental questions pertaining to estuaries is how material is mixed into ambient waters and transported within and beyond the estuary. Characterizing transport and mixing is essential for tackling local environmental questions, such as gauging the water-quality impacts of a wastewater outfall, or how dredging may alter estuarine circulation. In many estuaries the dominant physical dispersion mechanism is shear dispersion. A fundamental and idealized approach to the scalar transport problem is undertaken, in which canonical shear dispersion regimes are augmented with a new, intermediate regime. This mode of shear dispersion, in which the longitudinal variance of the plume increase with the square of time, is likely to occur in channel-shoal basins where bathymetric transitions can create sheared velocity profiles. A key tool in the engineer's arsenal for pursuing studies of scalar transport is the numerical model, but care must be taken to separate physical mixing effects from numerical artifacts. Unstructured models are particularly well-suited to estuarine problems as the grid can be adapted to complex local topography, but the numerical errors of these models can be difficult to characterize with standard methods. An in-depth error analysis reveals a strong dependence of numerical diffusion on the orientation of the grid relative to the flow. Flexible grid generation methods allow for optimizing the grid in light of this dependence, and can decrease across-flow numerical diffusion by a factor of two. The most far-reaching impact of our actions, though, must certainly be global climate change. A period of rising sea level is being ushered in by climate change, and the final research-oriented chapter seeks to further our understanding of how rising sea levels will affect basin-scale tidal dynamics. Numerical and analytic approaches show that as basins get deeper tidal amplification becomes more effective and tidal range increases. The crux of the analysis, though, is the inclusion of inundation within these scenarios. Inundated areas dissipate incident tidal energy, countering the added amplification due to basins becoming deeper. The net effect, in the case of San Francisco Bay, is that tidal amplification under sea level rise actually decreases, such that a particular rise in mean higher high water in the coastal ocean is predicted to raise mean higher high water within the bay by a lesser amount.
Dispersion In Estuaries And Coastal Waters
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Author : Roy Lewis
language : en
Publisher:
Release Date : 1997-12-29
Dispersion In Estuaries And Coastal Waters written by Roy Lewis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-12-29 with Science categories.
Dispersion in Estuaries and Coastal Waters describes the physical processes which result in the dilution of a substance in the marine environment. The emphasis is mainly on the fundamental mechanisms of dispersion and the occurrence of these processes in estuaries and coastal waters Aspects of the present understanding of fluid dynamics in homogenous and stratified flows are discussed, with particular reference to the relevance of flow conditions to the turbulent state. The book describes how the associated dispersion processes are represented in mathematical models to quantify dilution in marine systems and the experimental techniques used to derive the mixing parameters required for the models. Concluding by discussing the application of the concepts of dispersion in well mixed, stratified and partially mixed systems, Dispersion in Estuaries and Coastal Waters acts as an excellent guide book for those needing to solve practical problems relating to marine dispersion. It also provides a useful review of dispersion as it cites key publications, both recent and long-standing, which are invaluable in interpreting and quantifying the dilution and fate of material in the marine environment.
Effect Of Intra Tidal Variations On Longitudinal Dispersion In Estuaries
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Author : Michael D. Disko
language : en
Publisher:
Release Date : 1968*
Effect Of Intra Tidal Variations On Longitudinal Dispersion In Estuaries written by Michael D. Disko and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968* with Estuarine pollution categories.
Mechanisms Of Tidal Dispersion In A Salt Marsh Estuary
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Author : Adrian Mikhail Palaci Garcia
language : en
Publisher:
Release Date : 2022
Mechanisms Of Tidal Dispersion In A Salt Marsh Estuary written by Adrian Mikhail Palaci Garcia and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Dispersion categories.
Dispersion in estuaries sets the length of salinity intrusion and the horizontal mixing rate of waterborne constituents, including larvae, nutrients, sediments, and contaminants. While bulk calculations of dispersion are readily estimated using traditional field measurements, the mechanisms contributing to the total dispersion are difficult to identify because they require high temporal and spatial resolution to measure. Recent advances in field techniques and numerical modeling have enabled the isolated study of various mechanisms contributing to dispersion, many of which vary on tidal time-scales and over small spatial scales. The objective of this thesis is to use a combination of high-resolution field measurements and numerical modeling to determine the mechanisms of dispersion that maintain the salt balance in the North River (Marshfield, MA), a tidally-dominated salt marsh estuary with complex topography. First, a field campaign was conducted to determine the dispersion associated with the out-of-phase exchange between tributary creeks and the main channel. Then, numerical simulations of an idealized estuary were conducted and a novel quasi-Lagrangian approach was applied to analyze the sources of dispersive salt fluxes throughout the estuary. A second field campaign was conducted to evaluate the spatial variability of shear dispersion, particularly near regions of abrupt topographic variations. The key result from this thesis is obtained through the first application of the theoretical moving plane framework of Dronkers & van de Kreeke (1986), which confirms quantitatively that all landward salt flux at a fixed location must result from spatial correlations in velocity and salinity within a tidal excursion of the fixed location. Based on this result, the sources of the landward salt flux can be directly identified based on the spatial and tidal variations of shear dispersion, which can vary strongly due to its dependence on the local tidal currents, along-channel salinity gradient, and bathymetry. This thesis identifies and quantifies various mechanisms of topographically-induced tidal dispersion and thus highlights the dominant role of topography in controlling the processes that contribute to mixing and transport in short, tidally-energetic estuaries.
1 D Tidal Propagation And Dispersion In Estuaries
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Author : Sean Clarke
language : en
Publisher:
Release Date : 1979
1 D Tidal Propagation And Dispersion In Estuaries written by Sean Clarke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Estuaries categories.
Mathematical Modelling Of One Dimensional Tidal Propagation And Dispersion In Estuaries
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Author : I. P. G. Hutchison
language : en
Publisher:
Release Date : 1974
Mathematical Modelling Of One Dimensional Tidal Propagation And Dispersion In Estuaries written by I. P. G. Hutchison and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Estuaries categories.
Unsteady Salinity Intrusion In Estuaries
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Author : Donald R. F. Harleman
language : en
Publisher:
Release Date : 1974
Unsteady Salinity Intrusion In Estuaries written by Donald R. F. Harleman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with River Mouth and estuaries categories.