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(Article of periodic en Anglais - 2015)

Document title

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

Authors(s) and Affiliation(s)

LI Z.-W. (1 2) ; ZHANG G.-H. (1 3) ; GENG R. (3) ; WANG H. (3) ; ZHANG X.C. (4) ;
(1) State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, CHINE
(2) Univ. of Chinese Academy of Sciences, Beijing, CHINE
(3) School of Geography, Normal Univ., Beijing, CHINE
(4) USDA-ARS, Grazinglands Research Lab., El Reno, ETATS-UNIS

Abstract

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

Source

Article of periodic

published at : Catena / ISSN 0341-8162

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

Millesime : 2015, vol. 124 [pp. 9-17]

Bibliographic references : 40 ref.

Collation : 10 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.08.019

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28944277 : Permanent link - XML version
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