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Wednesday, May 6, 2020 | History

3 edition of Numerical Model of Material Transport in Salt-Wedge Estuaries. found in the catalog.

Numerical Model of Material Transport in Salt-Wedge Estuaries.

United States Geological Survey

Numerical Model of Material Transport in Salt-Wedge Estuaries.

by United States Geological Survey

  • 129 Want to read
  • 28 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesU.S. Geological Survey professional paper -- 917.
ContributionsFischer, H.B.
ID Numbers
Open LibraryOL22076303M

The numerical model proposed for solving this problem is a second order Taylor–Galerkin Finite Element formulation. The proposed approach is applied to a real case: the analysis of the possible effects of dredging Los Lombos del Ulla, a formation of sandbanks in the Arousa Estuary (Galicia, Spain).Cited by: 1. Numerical models simulate water movements caused by tides, winds, waves and rivers, and the resulting sand and silt transport over an entire estuary. Near-bed current velocities predicted by a hydrodynamic model and wave orbital velocities predicted by a wave generation model are used to compute sediment transport,File Size: 1MB.

CiteScore: ℹ CiteScore: CiteScore measures the average citations received per document published in this title. CiteScore values are based on citation counts in a given year (e.g. ) to documents published in three previous calendar years (e.g. – 14), divided by the number of documents in these three previous years (e.g. – 14). Estuarine and coastal areas have been intensively studied given their complexity, ecological, and societal value and the importance of their ecosystem services. Estuarine and coastal management must be based on a sound characterization of these areas, which is achievable complementing the comprehensive field measurements with numerical models by: 2.

The intrusion of salt wedge in rivers is a natural phenomenon, which occurs in many estuaries. Saline water tends to propagate upstream from the river mouth, due to the limited freshwater and the tidal and density currents developed, resulting in deterioration of water quality in the lower river reach. Assessing the influence of sea level rise on salt transport processes and estuarine circulation in the Changjiang River estuary. Global sea level rise has been greatly concerned by government and society with its effects on saltwater intrusion and material transport in estuaries, which threaten freshwater habitat and drinking water by:


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Numerical Model of Material Transport in Salt-Wedge Estuaries by United States Geological Survey Download PDF EPUB FB2

NUMERICAL MODEL OF MATERIAL TRANSPORT IN SALT-WEDGE ESTUARIES Overlying layer FIGURE 1. Distribution of flow in a stationary salt wedge. Rather, a shape is assumed for the wedge, as shown in figure 2, and flow in the wedge is computed so that water volume is conserved.

Field measurements are used toAuthor: Hugo B. Fischer, J.D. Stoner, W.L. Haushild, J.B. McConnell. A numerical model of material transport in salt-wedge estuaries: prepared in cooperation with the Municipality of Metropolitan Seattle. A numerical model of material transport in salt-wedge estuaries Professional Paper By: Hugo B.

Fischer, J.D. Stoner, W.L. Haushild, and J.B. McConnell. Abstract. A new method to compute the transport of density in baroclinic numerical models without artificial diffusivity is presented.

As a critical application, the salt intrusion into a schematic estuary of the size of the Elbe estuary is by: 7. MATERIALS AND METHODS Numerical model description A two-dimensional, laterally-intregrated, explicit, finite-difference numerical model has been devel-oped to describe the characteristics of the salt wedge intrusion in the estuary of Strymon River.

The governing equations of the model are based on the principles of conservation of volume. FVCOM with CSTMS has been used previously to model sediment transport for the Skagit River, another shallow, energetic salt wedge estuary with a mixed grain size distribution [Ralston et al., ].

The details of the model development and validation for the Connecticut River estuary model are described elsewhere [ Ralston et al., ], with Cited by: In most estuaries, the structure of the salt wedge is strongly modified by tidal currents (e.g.,Geyer and Farmer ).

The quasi-steady arrested layer model of the salt wedge is an accurate description of the wedge at arrest, occurring soon after the upper layer begins to ebb (Geyer and Farmer ).

The length predictedisthusanindicationofthemaximumin. Other chapters consider the elements in a mathematical model for estuarial sediment transport. This book discusses as well sediment transport rates in coastal waters. The final chapter deals with accurate estimates of fish abundance for models of many estuarine processes.

Theoretical results are obtained for salt-wedge estuaries which give the velocity profile, stress distribution, shape and length of the wedge for steady-state flow conditions. It is assumed that. In the first transect (panel b) the salt wedge arrives around PST, roughly in the middle of the rising tide (see panel a).

Simulated salinity field, interpolated to the same points in space and time, is shown in panel (c). The model correctly reproduces the incoming salt wedge, but it is delayed by roughly 1 km or 15 by:   Purchase Estuarine Processes - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1.

This Special Issue aims to cover the main relevant numerical modeling approaches related with water and sediment pollution in estuarine and marine environments, including among others the following pollutants: fecal bacteria, organic matter, nutrients, toxic substances, endocrine disrupting chemicals, emerging pollutants, harmful algae and.

In the estuarine zone, salt-wedge sediment trapping has been reported in highly stratifi ed river channel estuaries such as the Hudson (Feng et al., ;Woodruff et al., ;Geyer et al., Estuaries: Monitoring and Modeling the Physical System examines these processes, offering extensive information about the geological evolution of estuaries, and details of bathymetry, tides, currents, salt and heat, and suspended by: A numerical model of material transport in salt-wedge estuaries,Professional Paper Post-Carboniferous stratigraphy, northeastern Alaska,Professional Paper By means of a numerical model of an idealized flat-bottom estuary, the paper studies the hydrodynamic control of the turbidity zone by the combined effect of the salt wedge and tidal movements.

The model is of two-dimensional (x, z) finite-difference type with high resolution in time and space. It computes momentum, surface.

Salt Wedge Estuary Partially Mixed Estuary. 2 Fully Mixed Estuary Inverse Estuaries •High Evaporation, low river input •Water leaves along bottom - saline outflow •Water enters above - influx of “normal” Residence Time •% of freshwater in the transport outFile Size: KB.

Small-scale physical models may also be used together with analytical and numerical models. The book highlights the fact that research and theory are interactive, and the results provide the fundamentals for the development of the estuarine research.

Purchase Coastal and Estuarine Fine Sediment Processes, Volume 3 - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1. In coastal environments, tidal flow, current, and waves may cause beach erosion and variation of water quality.

The hydrodynamics in estuaries and coasts is very complicated and requires a unique approach combining theoretical analysis, numerical modelling, physical laboratory experimental model study, as well as field observation. Estuaries: Monitoring and Modeling the Physical System - Kindle edition by Hardisty, Jack.

Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Estuaries: Monitoring and Modeling the Physical System.1/5(2).A model to determine advective fluxes of water and salt in three-layer salt wedge estuaries under steady river discharge is presented.

This model is a generalization of the Knudsen's two-layer model when applied to highly stratified estuaries. The reason for this is that Knudsen's model neglects the interface and produces biased estimates of the salt fluxes at this by: RESEARCH ARTICLE /JC Salt wedge dynamics lead to enhanced sediment trapping within side embayments in high-energy estuaries Brian Yellen 1, Jonathan D.

Woodruff, David K. Ralston2, D. G. MacDonald3, and D. S. Jones4 1Department of Geosciences, University of Massachusetts, Amherst, Massachusetts, USA, 2Department of Geology and Geophysics, Woods Cited by: