DYNAMIQUE DE LA CREME DE VASE DANS L’ESTUAIRE DE LA LOIRE
Dynamique de la crème de vase dans l’estuaire de la Loire 1. Introduction 2. Matériel et méthodes 2.1. Base de données 2.2. Analyse des faciès acoustiques 3. Résultats 3.1. Partie centrale 3.2. Partie externe 4. Conclusions 5. Références bibliographiques
TOWARD SENTINEL-2 HIGH RESOLUTION REMOTE SENSING OF SUSPENDED PARTICULATE MATTER IN VERY TURBID WATERS: SPOT4 (TAKE5) EXPERIMENT IN THE LOIRE AND GIRONDE ESTUARIES
(dossier articles) Toward sentinel-2 high resolution remote sensing of suspended particulate matter in very turbid waters: spot4 (take5) experiment in the Loire and Gironde estuaries 1. Introduction 2. Material and methods 2.1. Study sites 2.2. SPOT4 (Take5) experiment in the Gironde and Loire estuaries 2.3. Validation dataset 3. Results 3.1. Satellite data summary 3.2. Range […]
BALANCE BETWEEN TURBIDITY MAXIMUM AND FLUID MUD IN LOIRE ESTUARY – LESSONS OF A FIRST MATHEMATIC MODELLING
(dossier articles) Balance between turbidity maximum and fluid mud in Loire estuary – Lessons of a first mathematic modelling Introduction Presentation of the Loire estuary Model description – hydrodynamics – Sediment transport Results – Tide propagation – Sediment distribution – Formation of the turbidity maximum Discussion Conclusion References
COUPLED 3D MODELING OF TURBIDITY MAXIMUM DYNAMICS IN THE LOIRE ESTUARY, FRANCE
Coupled 3D modeling of turbidity maximum dynamics in the Loire estuary, France Introduction Objectives of the model Model description Hydrodynamic calibration Salinity calibration – Classical mixing length and K-epsilon models – The multilayer mixing length Suspended sediment transport and bed consolidation model – Deposition rate and setting velocity – Verification of the suspended sediment transport […]
DETERMINATION OF THE RESIDENCE TIME OF SUSPENDED PARTICLES IN THE TURBIDITY MAXIMUM OF THE LOIRE ESTUARY BY BE ANALYSIS
(dossier articles) Determination of the residence time of suspended particles in the turbidity maximum of the Loire estuary by be analysis Abstracts 1. Introduction 2. Experimental section and methods 2.1. Study area 2.2. Sampling and Be analysis 3. Experimental results 3.1. Be sources 3.2. Be concentration in the turbidity maximum, bottom sediments and the sea […]
BIODEGRADABILITE DE LA MATIERE ORGANIQUE DANS LE BOUCHON VASEUX ET LE CREME DE VASE DE L’ESTUAIRE DE LA LOIRE
Biodégradabilité de la matière organique dans le bouchon vaseux et le crème de vase de l’estuaire de la Loire Introduction Matériel et méthodes – Cadre des campagnes de septembre 1990 et 1991 – Prélèvements et filtration – Analyses des paramètres physico-chimiques, carbone et azote organique, sels nutritifs, chlorophylle a et phéopigments – Méthodes analytiques – […]
NUMERICAL MODELLING OF SUSPENDED SEDIMENT TRANSPORT IN THE LOIRE ESTUARY
Numerical modelling of suspended sediment transport in the Loire estuary In order to evaluate silt displacements and deposits in the outer part of the Loire Estuary over one year, a two-dimensional depth-integrated model of suspended sediment transport has been carried out. It takes into account transport and dispersion of suspended sediment by tidal currents, and […]
AMELIORATION DU FONCTIONNEMENT HYDROSEDIMENTAIRE DE L’ESTUAIRE DE LA LOIRE : LEVIERS D’INTERVENTION ET MODELISATION HYDROSEDIMENTAIRE TRIDIMENSIONNELLE
Amélioration du fonctionnement hydrosédimentaire de l’estuaire de la Loire : leviers d’intervention et modélisation hydrosédimentaire tridimensionnelle 1. Introduction 2. Évolution des principes d’aménagement 2.1. Introduction 2.2. Régulation hydraulique de l’estuaire : l’ouvrage de déconnexion 2.3. Recherche d’une restauration plus douce pour l’estuaire 3. Le scénario de restauration envisagé aujourd’hui 4. Mise au point du scénario […]
PRESENT-DAY PALYNOMORPH DEPOSITS IN AN ESTUARINE CONTEXT/ THE CASE OF THE LOIRE ESTUARY
Present-day palynomorph deposits in an estuarine context: the case of the Loire estuary 1. Introduction 2. Environmental settings 3. Material and methods 3.1. Field sampling 3.2. Palynological analysis 4. Results 4.1. Longitudinal transect 4.2. Perpendicular transects to the Loire active river bed 4.3. Statistical analyses 5. Discussion 5.1. Pollen deposition pattern 5.2. Dinocyst deposition pattern […]
MESURE DE LA VITESSE DE CHUTE DES SEDIMENTS FINS EN LABORATOIRE ET IN SITU
Mesure de la vitesse de chute des sédiments fins en laboratoire et in situ 1. Introduction 2. Relations théoriques de la vitesse de chute de particules en suspension 3. Ordres de grandeur de la vitesse de chute des sédiments fins de Loire 4. Mesure de la vitesse de chute en eau calme en laboratoire 5. […]