Measuring rill erosion by laser scanning

Auteur(s) et Affiliation(s)



Description :
This paper reports the results of a field investigation on the rill morphology and the corresponding soil loss, using a Terrestrial Laser Scanner (TLS), at the Masse experimental station (Umbria, Central Italy). For this paper 5 scans were made of some rills, which formed during particularly erosive rain in the plots of the Masse station. The point cloud was first interpolated by the natural neighbor method to create a discrete 0.02 m × 0.02 m square cell grid Digital Elevation Model (DEM) used for mapping the flow network. Three methods were applied to the DEM for detecting the channel network : the slope method (Horn, 1981; Wood, 1996), the constant drop method, described by Broscoe (1959) and the method of landform curvature (Tarolli et al., 2012). Finally, a comparison between the geometric characteristics and the eroded volumes was made using data measured both by the manual technique (profilometer) and by the TLS survey.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2015, vol. 124, p. 97-108, nombre de pages : 12, Références bibliographiques : 57 ref.

Date :
2015

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