ETUDE DE L’INTERFACE EAU-SEDIMENT DANS LES GEOSYSTEMES ESTUARIENS : APPROCHE COUPLEE BIOGEOCHIMIE ET MODELISATION PAR L’EVALUATION DES FLUX DE NUTRIMENTS
Introduction 1. Biogéochimie et hydrodynamisme d’un estuaire macrotidal : fonctionnement et méthodes d’étude 1.1. Fonctionnement d’un estuaire macrotidal 1.2. Les méthodes de modélisation et d’échantillonnage de l’interface eau-sédiment 2. Matériels et méthodes 2.1. Sites d’étude 2.2. Méthodes d’étude des vasières intertidales 2.3. Modèles numériques de diffusion et d’advection 3. Étude de l’hétérogénéité spatiale et temporelle […]
ESTUARINE FACIES MODELS: CONCEPTUAL BASIS AND STRATIGRAPHIC IMPLICATIONS
Estuarine facies models: conceptual basis and stratigraphic implications Introduction Estuary definitions Relationship of estuaries to other coastal systems Estuarine dynamics and facies zonation: the end-member models Estuarine variability Stratigraphic implications Summary Aknowledgments References
SEDIMENT TRANSPORT PROCESSES IN ESTUARIES
Sediment transport processes in estuaries Introduction Tidal effects Types of estuaries – Highly stratified estuary – Partially mixed estuaries – Well mixed estuaries Modes of sediment transport Mud properties – Flocculation – Settling velocity – Deposition – Erosion Transport of mud in tidal currents Turbidity maximum Processes forming the turbidity maximum – Residual circulation – […]
THE IMPORTANCE OF SUPPRESSION OF TURBULENCE BY STRATIFICATION ON THE ESTUARINE TURBIDITY MAXIMUM
The importance of suppression of turbulence by stratification on the estuarine turbidity maximum Introduction The influence of stratification on suspended sediment flux – Equilibrium suspended sediment distributions in neutral flux – Suppression of turbulence in stratified estuaries – Settling of sediment in stratified estuaries Simulation of the turbidity maximum – Model formulation – Results of […]
NEW DIMENSIONS IN ESTUARY CLASSIFICATION
New dimensions in estuary classification Introduction Salt balance relationships Classification in terms of stratification and circulation Relationship of stratification and circulation to bulk parameters in well-mixed and partially mixed estuaries Discussion References
GRAVITATIONAL CIRCULATION IN STRAITS AND ESTUARIES
Gravitational circulation in straits and estuaries 1. Introduction 2. Formulation 3.1. The central regime; theory 3.2. The central regime; comparison with observations 4.1. The inner regime; theory 4.2. The inner regime; comparison with observations 5. Discussion 6. Conclusion References
STRATIGRAPHY OF TIDE-DOMINATED ESTUARIES
Stratigraphy of tide-dominated estuaries 1. Introduction 2. Tide- vs. Wave-dominated estuaries: a few reminders 3. Stratigraphy of tide-dominated estuary infill: case studies 3.1. Progress in the assessment of estuary stratigraphy: the use of very high-resolution seismic data 3.2. Modern estuaries with low river sediment supply 3.3. Modern estuaries with high river sediment supply 3.4. Ancient […]
TIDE-DOMINATED ESTUARIES AND TIDAL RIVERS
Tide-dominated estuaries and tidal rivers Introduction – The classification problem Physical processes in tide-dominated estuaries – Effects of tide on sediment dynamics – Formation of a tidal turbidity maximum Morphologic and sedimentologic character – Estuarine morphology – Estuarine sedimentology – Fluid-mud deposits – Estuarine infilling Holocene examples: tide-dominated estuaries – Gironde estuary – Severn estuary […]
CYBESTUARIES : POUR DE BONNES PRATIQUES DE GESTION DURABLE DES ESTUAIRES EUROPEENS
Cybestuaries : pour de bonnes pratiques de gestion durable des estuaires européens Structure du CD-rom cybestuaries Caractéristiques des estuaires – Introduction – Définitions – Le système naturel – Le système socio-économique – Les problèmes – Objectif de durabilité : la gestion intégrée Directives de bonne pratique – Le modèle cybestuaries – Les principes de bonne […]
DRAGAGES ET ENVIRONNEMENT MARIN
Dragages et environnement marin 1. Les techniques de dragage et de rejet – Les dragues mécaniques – Les dragues aspiratrices – Les barres niveleuses – Les dragues pneumatiques – La technique de l’injection (Jetsed) – Dragages en milieu contaminé – Les techniques de rejet 2. Les dragages sur le littoral français – Les implantations portuaires […]