|
|
|
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
|
