Factors affecting soil loss at plot scale and sediment yield at catchment scale in a tropical volcanic agroforestery landscape

Auteur(s) et Affiliation(s)



Description :
The purpose of this study as part of a Negotiation Support System approach was to assess sediment yield both at plot and catchment scale in Sumberjaya area in Sumatra and to relate it to a variety of possible clarifying factors i.e. land use, geology, soil and topography. Sediment yield at catchment scale per unit area, was found to be 3-10 times higher than soil loss measured in erosion plots. A stepwise regression showed that the dominant factors explaining sediment yield differences at catchment scale in this volcanic landscape were a particular lithology (Old Andesites) and slope angle followed by the silt fraction of the top soil. The quantification of land use effects on dominant erosive processes such as river bank and river bed erosion, landslides and the concentrated flow erosion on footpaths and roads can contribute to more targeted efforts and relevant incentives to reduce (or live with) sediment load of the rivers.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2010, vol. 80, n°. 1, p. 34-46, nombre de pages : 13, Références bibliographiques : 1 p.

Date :
2010

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