Resumen de Transporte eólico de sedimentos: calibración de modelos mediante trampas de sedimento y perfiles de viento
Javier Alcántara Carrió, Ignacio Alonso Bilbao
The Isthmus of Jandia (S of Fuerteventura), with more than 54 km2, presents different aeolian deposits such as dunes, sandsheets, and serir. Actually, a great amount of sediments are blowing from the Isthmus to the lee beaches. Therefore, the quantification o f the aeolian sediment transport is basic for the characterisation of its sedimentary dynamic.To calibrate the models it is necessary to apply some empirical methods such as the use of sandtraps. Between the different designs of sand traps we are chosen the Leatherman one (Leatherman,1 978), slightly modified to avoid scouring. Simultaneously wind profiles were measured at thesame location with an anemometer tower (cup anemometers at 0.23, 0.5, 1 and 4 m height) during one day, with 5 minutes sampling period. Field experiments were carried out at seven stations and two seasonal periods (winter andsummer), and finally, six theoretical models were calibrated: Kawamura (1951), Zingg (1952), Bagnold (1956), Williams (1964), Hsu (1973, 1977), and Lettau & Lettau (1978) (see references in Sherman & Hotta, 1990). In conclusion, the Bagnold model is the most accurate one in order to predict the aeolian sand transport.
