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(Article of periodic en Anglais - 2012)

Document title

Predicting physical equations of soil detachment by simulated concentrated flow in Ultisols (subtropical China)

Authors(s) and Affiliation(s)

WANG J.-G. (1) ; LI Z.-X. (1) ; CAI C.-F. (1) ; YANG W. (1) ; MA R.-M. (1) ; ZHANG G.-B. (1) ;
(1) Key Lab. of Subtropical Agriculture & Environment of Ministry of Agriculture, Agriculture Univ., Wuhan, Huazhong, CHINE

Abstract

This study was conducted to develop a formula to predict soil detachment rate in concentrated flow by using the aggregate stability index, root density and saturated soil strength in the subtropical Ultisols region of China (Xianning County in Hubei province). The detachment rates of undisturbed topsoil samples collected from 8 cultivated soil plots were measured in an hydraulic flume under 5 different flow shear stresses. The results indicated that the stability index was well related with soil detachment rate, particularly for results obtained with high flow shear stress, and the stability index has a good linear relationship with concentrated flow erodibility factors. There was a positive linear relationship between saturated soil strength and critical flow shear stress for different soils. A significant negative exponential relationship between erodibility factors and root density was detected. This study yielded 2 prediction equations that allowed comparison of their efficiency in assessing soil detachment rate in concentrated flow.

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no6 [pp. 633-641]

Bibliographic references : 49 ref.

Collation : 7 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3195

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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