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(Article of periodic en Anglais - 2011)

Document title

Effects of DEM horizontal resolution and methods on calculating the slope length factor in gently rolling landscapes

Authors(s) and Affiliation(s)

LIU H. (1 2) ; KIESEL J. (2) ; HÖRMANN G. (2) ; FOHRER N. (2) ;
(1) Changjiang River Scientific Research Inst., Wuhan, CHINE
(2) Dep. of Hydrology and Water Resources Management, Inst. of the Conservation of Natural Resources, Univ., Kiel, ALLEMAGNE

Abstract

The AA. made 2 comparisons to evaluate the effects of DEM horizontal resolution and processing algorithm on the accuracy of the L factor in gently sloped landscapes : one is between the grid cumulating method (GC) and the contributing area method (CA) using D8 flow-routing algorithm, the other is among single (D8, Rho8) and multiple (FD8, FRho8 and DEMON) flow-routing algorithms for processing the contributing area method. In 2 comparisons, 5 m, 10 m, 25 m, 50 m and 100 m DEM of a 0.88 km2 catchment in the lowland of Northern Germany were applied. The results indicate that L factor calculated with any of the 6 methods is sensitive to horizontal resolution, which strongly affects the accuracy. It is concluded that DEM horizontal resolution is very important for L factor calculation. This study can be used for selecting a suitable method and DEM resolution for accurate calculation of L factor and soil loss in gently rolling landscapes

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2011, vol. 87, no3 [pp. 368-375]

Bibliographic references : 30 ref.

Collation : 7 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2011.07.003

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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