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(Article of periodic en Anglais - 2013)

Document title

Effect of natural restoration time of abandoned farmland on soil detachment by overland flow in the Loess Plateau of China

Authors(s) and Affiliation(s)

WANG B. (1 2) ; ZHANG G.-H. (1 2) ; SHI Y.-Y. (1 3) ; ZHANG X.C. (4) ; REN Z.-P. (2) ; ZHU L.-J. (2) ;
(1) State Key Lab. of Soil Erosion and Dry Land Farming on the Loess Plateau, Inst. of Soil and Water Conservation, CAS and Ministry of Water Resources, Yangling, CHINE
(2) School of Geography, Normal Univ., Beijing, CHINE
(3) College of Forestry, Northwest Univ., Yangling, CHINE
(4) USDA-ARS Grazinglands, research Lab., Oklahoma, El Reno, ETATS-UNIS

Abstract

This study was carried out in the Zhifanggou catchment to quantify the effects of age of abandoned farmland under natural vegetation restoration on soil detachment by overland flow and soil resistance to erosion as reflected by soil erodibility and critical shear stress. The undisturbed soil samples were collected from 5 abandoned farmlands with natural restoration age varying from 3 to 37 years. The samples were subjected to flow scouring in an hydraulic flume under 6 different shear stresses. The results showed that the measured soil detachment capacities in currently cultivated farmland were greater than those of the abandoned farmlands. For the abandoned farmlands, soil detachment capacities fluctuated greatly due to the complex effects of root density and biological crust thickness. Soil erodibility of abandoned farmlands decreased gradually with restoration age and reached a steady stage when restoration age was greater than 28 years. The critical shear stress of the natural abandoned farmlands declined when restoration age was less than 18 years and then increased due to the episodic influences of vegetation recovery and biological crust development

Source

Article of periodic

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

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

Millesime : 2013, vol. 38, no14 [pp. 1725-1734]

Bibliographic references : 2 p.

Collation : 9 fig., 6 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3459

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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