l'A. reconsidère la notion de fetch appliquée aux plages macrotidales à barres intertidales, en analysant, à partir de données enregistrées in situ, les paramètres environnementaux susceptibles d'affecter le transport éolien, en perturbant
l'écoulement de l'air, en modifiant la vitesse critique de mise en mouvement des sédiments ou en réduisant la distance potentielle de déflation (beach fetch distance). Il pose également la question de l'applicabilité du modèle de Bauer et Davidson-Arnott (2002
Uber die Beziehung zwischen dem Widerstandkoeffizienten und dem Windweg über See bei ablandigem Wind in Küstennähe. (On the relation between the drag coefficient and fetch above the sea in the case of land wind in coastal areas)
A simple model concept covering the variation in the exchange of momentum between atmosphere and sea in the nearshore zone as the fetch changes is verified experimentally. (HL).
The increase of soil mass flux with distance downwind, the fetch effect for wind erosion, has been observed and reported on since 1939. The model proposed incorporates 3 mechanisms: 1) the avalanching mechanism in which one particle moving downwind
A general framework for modeling sediment supply to coastal dunes including wind angle, beach geometry, and fetch effects
systems. The AA. erect a framework into which can be incorporated any of various existing models of equilibrium transport rate coupled with a simple parameterization of the fetch effect, and to accept these as reasonable surrogates for the complex micro
The effect of wind gusts, moisture content and fetch length on sand transport on a beach
This paper reports on an analysis of instantaneous sediment transport in relation to wind gusts, moisture content and fetch length from a field study carried out at Skallingen, Denmark. Wind speeds were measured with cup anemometers
Linear regression is used to examine effects of maximum fetch length and nearshore slope in controlling characteristics of barred nearshore profiles. Data came from twelve sites in the Great Lakes and two in the Gulf of St. Lawrence. Fetch length
Aeolian fetch distance and secondary airflow effects : the influence of micro-scale variables on meso-scale foredune development
This paper assesses the contribution of 2 system variables (secondary airflow patterns and fetch distance) to medium-term (months to years) dune development. Three methods were employed. First, sand drift potentials were calculated using 2 years
Bilan sédimentaire ; Cartographie ; Course du vent ; Donnée climatique ; Erosion des berges ; Fetch ; France ; Haute-Vienne ; Hydrodynamique ; Lac ; Limnologie ; Limousin ; Saint-Pardoux ; Vent
alors un rôle prépondérant dans l'érosion rivulaire. Au-delà d'une simple mesure du fetch, cette étude propose le croisement cartographique avec les données météorologiques. Ainsi, mise en évidence du rôle de la périodicité et de la force des épisodes
This paper presents results from a study designed to explore the effects of beach surface moisture and fetch effects on the threshold of movement, intensity of sand transport by wind and mass flux. The experiment was carried out over a period of 5
Nine different types of beaches were selected, on the basis of configuration (pocket beach or staight beach), profile (cliff, bluff or dunes), whether a river runs on to the beach or not, and the length of the fetches in the directions of prevailing
du fetch limité par le N se remarque à la construction d'une plaine côtière au N de l'île. Les îles de Surtla, Syrtlingur et Jolnir faites de cendres volcaniques forment maintenant une plate-forme sous-marine dont l'altitude s'est réduite
and physical force of ice activity mainly depend on the same environmental factors determining exposure to wave action (fetch, wind direction and velocity, and shore slope). The spatial and temporal variability of ice-scar chronology features also corresponded
such as the one presented here allow observations of the combined evolution of beach surface moisture, shoreline position, and fetch distances during short-term experiments and hence provide a comprehensive rendering of sediment erosion and transport processes.
the gale force event was substantial across the beach and foredune despite the moderate vegetation cover and minimum fetch. It is shown that strong storm winds are an effective mechanism for translating sediment landwards across a high vegetated foredune