Critical perspectives on the evaluation and optimization of complex numerical models of estuary hydrodynamics and sediment dynamics
England ; Estuary ; Hydrodynamics ; Model ; Numerical model ; Sediment transport ; Statistics ; Suffolk ; Suspended load ; Time series ; United Kingdom
Charge en suspension ; England ; Estuaire ; Hydrodynamique ; Modèle ; Modèle numérique ; Royaume-Uni ; Statistique ; Suffolk ; Série chronologique ; Transport sédimentaire
This paper examines the basis for evaluating the performance of complex hydrodynamic and sediment transport models, and the quantitative and qualitative understanding that can emerge from this kind of modelling, especially in situations where data
with reference to illustrative hydrodynamic and sediment transport model results for a muddy meso-tidal estuary.
limitations restrict the ability to parameterize processes that are known to be important. First, some general arguments relating to model validation are presented. Second, some new approaches to model performance evaluation and optimization are suggested
The basic berm-forms noted in the field are described briefly. These examples are used as prototypes in developing Froude-scaled hydraulic simulation models designed to replicate the observed features and shed light on the process and time-scales
Coastal dynamics ; Coastal environment ; Model ; Netherlands (The) ; Sediment transport
and model computations. The field observations focus on the present hydrodynamic and sediment transport processes, on the resulting morphological and sedimentological response, and on the geologic evolution of the ridges. - (AGD)
The present study adresses to the questions how the shoreface-connected ridges along the central part of the Dutch coast were formed and what their behaviour is under the present hydrodynamic conditions. The study is based on field observations
Etablissement d'un modèle hydrodynamique de l'écoulement. Description des caractéristiques bathygraphiques des micro-bassins-versants. Données concernant la Sibérie.
Coastal environment ; Experimentation ; Geographical information system ; Hydrodynamics ; Image processing ; Intertidal zone ; Model ; Research technique
Expérimentation ; Hydrodynamique ; Littoral ; Modèle ; Système d'information géographique ; Technique de recherche ; Traitement de l'image ; Zone intertidale
-geological conditions at Lake Ammersee have not yet been finally clarified, they created simulation scenarios for the hydrodynamicmodeling with various characteristics of sub-terrestrial inflow. Analysis of the simulation results for each scenario revealed
The AA. implemented groundwater inflow to the one-dimensional hydrodynamic simulation of lake water temperatures to improve the reproduction of the real water temperatures by the simulation results for Lake Ammersee, Southern Germany. As the hydro
of simulation results to real conditions for almost all depths and seasons. This implies that the hydrodynamic simulation of water temperatures at Lake Ammersee, including subsurface inflow, provides reliable results.
kilometres. For this purpose, a GIS-based sedimentation model was developed which uses two-dimensional water flow patterns simulated by a hydrodynamicmodel as a basis. The model was tested in a case study for 3 representative sections of the embanked
The main objective of this study is to provide a concept to relate quantitatively floodplain characteristics, hydrodynamic and sedimentological variables with spatial patterns of overbank sedimentation at the scale of a river reach of several
A coupling three dimensional baroclinic model of Biwa Lake air-water system
Atmospheric dynamics ; Cyclone ; Honshu ; Hydrodynamics ; Japan ; Lake ; Numerical model ; Seasonal variation ; Water circulation ; Water temperature ; Wind
Biwa ; Circulation de l'eau ; Cyclone ; Dynamique de l'atmosphère ; Honshū ; Hydrodynamique ; Japon ; Lac ; Modèle numérique ; Température de l'eau ; Variation saisonnière ; Vent
A numerical model coupling atmosphere with hydrodynamics is set up in this paper, and is applied in the experimental study of Lake Biwa. Discussion of the results.
Examen d'un modèle mathématique des processus thermohydrodynamiques au voisinage de la barre thermique en période de réchauffement printanier d'un lac.
of the flood extremity and flood extent the hydrodynamicmodel HEC-RAS was applied. - (EN)
This article deals with the reconstruction of the dam breach of the Blažnov pond and consequent flood wave progress in the riverbed of the small brook. The flood wave progressed through the brook valley with the length of 0.7 km. For the modelling
spécifiques à ces modèles bidimensionnels est l'incertitude des conditions limites. Suggère des méthodes de minimisation d'erreurs. Application d'un réseau d'éléments finis à la Baie de SanFrancisco.
European part of Russia ; Hydrodynamics ; Mathematical model ; Model ; Moscow ; Numerical model ; Statistical analysis ; Surface temperature ; Temperature
Description d'un modèle hydrodynamique de l'atmosphère et d'expériences numériques. Comparaison des champs MM5 et des données interpolées de Réanalyse avec les données d'observations des stations météorologiques.
Coastal environment ; Hydrodynamics ; Intertidal zone ; Model ; Sea level ; Sediment transport ; Wave
Hydrodynamique ; Littoral ; Modèle ; Niveau marin ; Transport sédimentaire ; Vague ; Zone intertidale
One of the primary objectives of coastal research is the erection and testing of mechanically sound, predictive models for the two- and three-dimensional form of beach and nearshore bathymetries in order to account for and to predict coastal
response to changing wave, tidal and sea-level conditions. An alternative is developed here in which frequency domain representations of a simplified set of process and response algorithms are presented, so that hydrodynamic, sediment dynamic
Satellite images and their use in the numerical modelling of coastal processes
The interpretation of Landsat imagery of a coastal embayment in the NW Aegean Sea is compared with numerical model outputs representing the same environment : remotely sensed data and output from the hydrodynamic and dispersion models can
A hydrodynamic and a dispersion model have been devised. Both models are two-dimensional, vertically integrated, and are solved numerically with a multioperational finite difference scheme (grid 300 300 m). (LW).