Flow hydraulic characteristic effect on sediment and solute transport on slope erosion

Auteur(s) et Affiliation(s)

GUO, T.

Guangdong Inst. of Eco-Environmental and Soil Sciences, Guangzhou, Chine

WANG, Q.

Univ. of Technology, Xian, Chine

LI, D.

Guangdong Inst. of Eco-Environmental and Soil Sciences, Guangzhou, Chine

ZHUANG, J.

Dep. of Biosystems Engineering and Soil Science, Inst. for a Secure and Sustainable Environment, Center for Environmental Biotechnology, Univ. of Tennessee, Knoxville, Etats-Unis

WU, L.

Dep. of Environmental Science, Univ. of California, Riverside, Etats-Unis

Description :
Different hydraulic parameters, including the hydraulic shear stress, unit length shear force, stream power, unit steam power, and effective stream power were used to quantify flow detachment. Two series of soil surface conditions were prepared in experiments : disturbed and uniform bare loess slope in laboratory; natural fallowed soil loess with or without stone covers in field experiments. The aim of this study was to assess the differences in hydraulic parameters and sediment detachment under these different soil surface conditions. The results show that the unit sediment load (Rs) has a good linear relationship with the unit runoff rate (Rr) for the flume and field experiments. The rate of Manning roughness coefficient to mean flow depth (n/h) is a good hydraulic indicator like as the stream power and Reynolds number for predicting the sediment load and solute transport rate in soil erosion.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 107, p. 145-153, nombre de pages : 9, Références bibliographiques : 43 ref.

Date :
2013

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

Langue :
Anglais