Land use impacts on soil detachment capacity by overland flow in the Loess Plateau, China

Auteur(s) et Affiliation(s)



Description :
This study was conducted to investigate the potential effects of land use on soil detachment capacity by overland flow (Dc) using natural undisturbed soil samples taken from 4 different land uses on the red loess soil and 6 different land uses on the yellow loess soil, and to quantify the relationships between soil detachment capacity and hydraulic parameters, soil properties, and root systems in the Loess Plateau. Experiments were carried out in the Zhifanggou watershed in Ansai County, Shaanxi Province. The collected samples were tested in an hydraulic flume under 6 different shear stresses. The results showed that both soil type and land use (cropland, shrub land, orchard, and grassland) had significant effects on Dc. The variability of Dc under different land uses was closely related to soil properties, root systems, and tillage operations. The measured detachment capacity could be well estimated by measurable parameters of stream power, slope gradient, soil bulk density, median diameter, silt content, cohesion, and root density.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2015, vol. 124, p. 9-17, nombre de pages : 9, Références bibliographiques : 40 ref.

Date :
2015

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