La Loire, de la Maine à la mer

Observations et suivis environnementaux

Webcam : l’estuaire en direct

Débit de la Loire à Montjean-s/L : 119 m/s source : https://www.vigicrues.gouv.fr/
Coefficient de marée à Saint-Nazaire : 45 (PM 10h39) / 40 (PM 23h06) source : https://www.shom.fr/

Recherche Globale

TECHNIQUES D’ETUDES ESTUARIENNES

Techniques d’étude estuariennes Évaluation théorique de la charge solide d’une rivière Évaluation théorique de la charge solide d’un fleuve L’étude expérimentale de la charge solide en suspension dans un écoulement L’étude des sédiments grossiers transportés par saltation et roulement sur le fond des lits fluviaux Le déplacement des grains sableux sous l’effet d’un courant d’eau […]

MACROPLASTIC TRANSFER DYNAMICS IN THE LOIRE ESTUARY: SIMILARITIES AND SPECIFICITIES WITH MACROTIDAL ESTUARIES

Macroplastic transfer dynamics in the Loire estuary: similarities and specificities with macrotidal estuaries 1. Introduction 2. Material and methods 2.1. Loire river estuary 2.2. Tracker program and data collection 2.3. Experiment dsign 2.4. Data treatment 3. Results 3.1. Macroplastic transfer dynamics in the Loire estuary 3.2. The impact of hydrological conditions 3.3. The impact of […]

NUTRIENT TRANSPORT AND TRANSFORMATION IN MACROTIDAL ESTUARIES OF THE FRENCH ATLANTIC COAST: A MODELING APPROACH USING THE CARBON-GENERIC ESTUARINE MODEL

Nutrient transport and transformation in macrotidal estuaries of the French Atlantic coast: a modeling approach using the Carbon-Generic Estuarine Model 1. Introduction 2. Materials and methods 2.1. Study area 2.2. Data collection 2.3. Modelling approach and setting 2.4. Model calibration 2.5. Calculation of indicators of estuarine ecological functions 3. Results 3.1. Model performance 3.2. Biogeochemical […]

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 […]