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Suitability of terrestrial laser scanning for studying surface roughness effects on concentrated flow erosion processes in rangelands

Auteur(s) et Affiliation(s)

EITEL, J.U.H.
Geospatial Lab. for Environmental Dynamics, Univ. of Idaho, Moscow, Etats-Unis
McCall Outdoor Science School, Univ. of Idaho, McCall, Etats-Unis
WILLIAMS, C.J.
US Dep. of Agriculture, Agricultural Research Service, Northwest Watershed Research Center, Boise, Etats-Unis
VIERLING, L.A.
Geospatial Lab. for Environmental Dynamics, Univ. of Idaho, Moscow, Etats-Unis
AL-HAMDAM, O.Z.
US Dep. of Agriculture, Agricultural Research Service, Northwest Watershed Research Center, Boise, Etats-Unis
Dep. of Biological and Agricultural Engineering, Univ. of Idaho, Moscow, Etats-Unis
PIERSON, F.B.
US Dep. of Agriculture, Agricultural Research Service, Northwest Watershed Research Center, Boise, Etats-Unis


Description :
To test the suitability of terrestrial laser scanning for studying surface roughness effects on erosion processes in rangelands, The AA. used concentrated flow simulation techniques at 8.5 m2 plots that were randomly placed at rangeland sites in southeastern Oregon and southwestern Idaho, USA. Local surface roughness (locRMSH) was calculated as the standard deviation of TLS mapped surface heights within moving windows varying in size from 30 × 30 to 90 × 90 mm. The mean locRMSH of the eroded area and entire plot were negatively correlated with concentrated flow erosion. Adjusting locRMSH for slope effects decreased the strength of the locRMSH–erosion relationship. The results indicate that TLS is a useful tool to enhance the current understanding of the effect of surface roughness on overland flow erosion processes and advance hydrologic and erosion model parameter development.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2011, vol. 87, n°. 3, p. 398-407, nombre de pages : 10, Références bibliographiques : 50 ref.

Date :
2011

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

Langue :
Anglais
Droits :
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