Consulta: subjectFacets:"Residual flow"
Registros recuperados: 9
Data/hora: 03/06/2024 05:05:50

Influence des apports fluviatiles en Baie de Seine
Provedor de dados: 5
Autores: Avoine, J; Crevel, L.
Hydrological study of Seine Bay displays two areas differentiated by salinity distribution. One has marine characteristics and the other is under fluvial influence. In this paper the authors give the main results of exchanges between the environments, obtained by the study of water dilution, solid particles dispersion, and their contribution to sedimentation.
Tipo: Text
Palavras-chave: Estuarine front; River plumes; Trace metals; Salinity; Residual flow; Seasonal variations; Environmental effects; Sediment dynamics; Estuarine sedimentation; River discharge.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1275.pdf

Simulation of tides, residual flow and energy budget in the Gulf of California
Provedor de dados: 5
Autores: Carbajal, N; Backhaus, Jo.
With the application of a two-dimensional nonlinear hydrodynamical-numerical semi-implicit model, the principal tides M(2), S(2), K(2), N(2), K(1), P(1) and O(1) were studied. Energy budgets of the semi-diurnal M(2) and S(2) were calculated separately. The linear sum of these budgets was compared with the tidal energy budget obtained when these two tidal constituents interact. Since a quadratic form for the bottom friction was used, remarkable differences were found. The results show that in the area of the Colorado River delta, the dissipation of tidal energy is very strong. Intense tidal currents were observed in the same region and over the Salsipuedes Sill. Energy budgets calculated for forcing waves of different periods, but of the same amplitude,...
Tipo: Text
Palavras-chave: Modèle numérique; Marée; Courant résiduel; Bilan énergétique; Seiche; Numerical modelling; Tide; Residual flow; Energy budget; Seiche.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00325/43666/43204.pdf

Courantologie calculee en Baie de Seine
Provedor de dados: 5
Autores: Salomon, J.
The movement of water particles in the ocean and littoral zone can be thought of as the result of elementary components superimposed, of which tidal flow is the main factor. Hydrodynamical equations show that these movements are more coupled in the coastal zone than in deep ocean. This characteristic is the result of current intensity, spatial gradients and bottom topography (depth). In the coastal environment tidal flow must be taken into account to study dynamic processes. The tide is not only an alternative movement but is the inducer of a long term current: the residual current. The author uses a bidimensional model to study currents from the depth and vertical structure of residual currents by the effect of density variations.
Tipo: Text
Palavras-chave: Density gradients; Mathematical models; Current prediction; Residual flow; Tidal currents; Lagrangian current measurement; Water circulation.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1258.pdf

Dynamique des eaux (en Baie de Seine): Synthese des discussions
Provedor de dados: 5
Autores: Chabertd'Hieres, G.
The discussions about "water dynamics" have dealt with the knowledge of long-term water mass circulation (from several days to several months), by the effects of three parameters: tides near limits and in the Seine Bay, turbid freshwater discharge (Seine river) and winds. This communication gives information about Eulerian and Lagrangian drift, used for residual current exhibition.
Tipo: Text
Palavras-chave: Lagrangian current measurement; Eulerian current measurement; Mathematical models; Coastal zone; Residual flow; Hydrodynamics.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1271.pdf

Approche de la circulation residuelle en Baie de Seine
Provedor de dados: 5
Autores: Lehir, P; Salomon, J; Leprovost, C; Chabertd'Hieres, G; Mauvais, J.
By taking into account salinity measurements and consequently mean residence time, current measurements, tidal computation with a 2-D model and wind induced currents provided by a 3-D model, a global diagram of residual flow in Seine Bay is given. Main patterns are exhibited: density currents in the eastern part of the bay, off the Seine Estuary, wind induced circulation, especially along the coast and over the Channels, and tidal residual patterns induced by topography.
Tipo: Text
Palavras-chave: Simulation; Modelling; Wind driven circulation; Bottom topography; Density gradients; Water masses; River discharge; Haline circulation; Salinity gradients; Tidal currents; Residual flow.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1263.pdf

Modeles mathematiques de courants residuels sur le plateau continental nord europeen
Provedor de dados: 5
Autores: Djenidi, S; Nihoul, J; Ronday, F; Garnier, Antonin.
To study residual currents the authors use mathematical models. The introduction deals with parameters having an influence on this process in the North sea and adjacent seas (shallow environments): tidal residual circulation, limit conditions and winds. Several maps give a representation of results.
Tipo: Text
Palavras-chave: Tidal currents; Wind driven circulation; Boundary conditions; Mathematical models; Continental shelves; Residual flow.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1270.pdf

Probabilistic approach of water residence time and connectivity using Markov Chains with application to tidal embayments
Provedor de dados: 5
Autores: Bacher, Cedric; Filgueira, R.; Guyondet, T.
Markov Chain analysis was recently proposed to assess the time scales and preferential pathways into biological or physical networks by computing residence time, first passage time, rates of transfer between nodes and number of passages in a node. We propose to adapt an algorithm already published for simple systems to physical systems described with a high resolution hydrodynamic model. The method is applied to bays and estuaries on the Eastern Coast of Canada for their interest in shellfish aquaculture. Current velocities have been computed by using a 2 dimensional grid of elements and circulation patterns were summarized by averaging Eulerian flows between adjacent elements. Flows and volumes allow computing probabilities of transition between elements...
Tipo: Text
Palavras-chave: Transfer time; Transfer rate; Residual flow; Indicators; Aquaculture; Hydrodynamics.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00280/39124/37677.pdf

Observations de courant en Baie de Seine
Provedor de dados: 5
Autores: Lehir, P; L'Yavanc, J.
Results of long-term current measurements in the Seine Bay are presented: (1) tidal flow and propagation of the tide across the bay; (2) ability to predict tidal currents from previous measurements by the means of harmonic analysis; (3) identification of residual flow factors according to a principal component analysis in a complex space; (4) description of the tidal residual flow with large eddies; (5) demonstration of wind effects on currents.
Tipo: Text
Palavras-chave: Meteorological observations; Mathematical models; Long term records; Residual flow; Current prediction; Tidal currents; Water circulation; Current observations.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1257.pdf

Mercurio en sedimentos del litoral ecuatoriano, crucero de prospección pesquera T03/10/02D
Provedor de dados: 20
Autores: Chalen, F.
The present work was carried out in the coastal area of Ecuador under the Project ODEPLAN of the Instituto Nacional de Pesca. The evaluated information corresponds to samples collected on October 2003. Iniatially a total of 43 places were programmed for the sampling of bottom sediments, wich were demarcated with a GPS (Global Positional System). Even though there were collected a total of 41 sediments samples using a Van Veen drag, the same ones that were analyzed by Spectrophotometry of Atomic Absorption with Cold Vapor. The mercury was investigated in the total sediment as in the sediment ~,to 125 ~km, like a measure to evaluate its levels, to know its distribution in the study area that wich will allow the recognize certain events that happen with high...
Tipo: Journal Contribution
Palavras-chave: Mercury; Residual flow; Sediments; Sampling.
Ano: 2010
URL: http://hdl.handle.net/1834/5374