Aeolian sand strip mobility and protodune development on a drying beach : examining surface moisture and surface roughness patterns measured by terrestrial laser scanning

Auteur(s) et Affiliation(s)



Description :
The AA. employed a terrestrial laser scanner to monitor beach surface moisture variability during a 3,5 hour period after a rain event and investigated relationships between bedform development, surface roughness and surface moisture. Their results demonstrate that as the beach surface dries, sand transport increases, with sediment erosion occurring at the wet/dry surface boundary, and deposition further downwind. This dynamic structure, dependent upon changing surface moisture characteristics, results in the formation of a rippled sand strip and ultimately a protodune. These findings highlight dynamic mobility relationships and confirm the need to consider transient bedforms and surface moisture across a variety of scales when measuring aeolian transport in beach settings. The terrestrial laser scanner provides a suitable apparatus with which to accomplish this.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 4, p. 513-522, nombre de pages : 10, Références bibliographiques : 1,5 p.

Date :
2011

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley