La Loire, de la Maine à la mer

Observations et suivis environnementaux

Webcam : l’estuaire en direct

Débit de la Loire : 291 m/s source : https://www.vigicrues.gouv.fr/
Coefficients des marées : 70 (PM 4h38) / 70 (PM 16h52) source : https://www.shom.fr/

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 […]

LES GRANDS ESTUAIRES FRANCAIS

Les grands estuaires français Publié dans la revue Équinoxe, spécial environnement littoral n° 47-48, mars-avril 1994 Les estuaires macrotidaux Les grands estuaires Français Aspects hydrodynamiques Aspects hydrosédimentaires Des caractéristiques propres Conclusion

INFLUENCE DU BOUCHON VASEUX SUR LES VARIATIONS DES CONCENTRATIONS EN OXYGENE DISSOUS – CAS DE L’ESTUAIRE DE LA LOIRE

(double) Influence du bouchon vaseux sur les variations des concentrations en oxygène dissous – Cas de l’estuaire de la Loire Introduction 1. Distribution et évolution de l’oxygène dissous dans l’estuaire de la Loire 2. Le cycle de l’oxygène dissous dans l’estuaire de la Loire : approche de la modélisation et quantification des mécanismes Conclusions Bibliographie

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

MODELISATION DE LA DEGRADATION BACTERIENNE DE LA MATIERE ORGANIQUE – APPLICATION A LA ZONE DE TURBIDITE MAXIMALE DE L’ESTUAIRE DE LA LOIRE

(dossier articles) Modélisation de la dégradation bactérienne de la matière organique – Application à la zone de turbidité maximale de l’estuaire de la Loire Résumé 1. Introduction 2. Matériel et méthodes 2.1. Prélèvements 2.2. Analyses des paramètres physicochimiques, du carbone et de l’azote organique, de sels nutritifs, de la chlorophylle a et des phéopigments 2.3 […]

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 […]