Patterns of topographic change in sub-humid badlands determined by high resolution multi-temporal topographic surveys

Auteur(s) et Affiliation(s)



Description :
This paper aims to demonstrate how reliable estimates of topographic variables and temporal change can be derived for badlands by repeat Terrestrial Laser Scanning (TLS) surveys undertaken at multiple temporal (event to annual) scales. A total of 7 TLS-surveys were obtained in an experimental sub-humid badland located in the Villacarli Catchment, Central Pyrenees, Iberian Peninsula. Data analyses were conducted on 2 temporal scales : (a) 5 rainfall events and (b)3 long term (spaced over an annual cycle) scales. The results show a clear erosional pattern for most of the badland at the annual scale. Aspect, surface roughness and slope were significant predictors of topographic change, although the sign and magnitude of the change differed at the event scale. At the annual scale the effect of aspect in the sign of the topographic change was removed and slope becomes more important. Overall, the results indicate that coupling of appropriately-scaled spatial and temporal data is critical to understand topographic changes and their drivers on badlands.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2014, vol. 120, p. 164-176, nombre de pages : 13, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena