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(Article of periodic en Anglais - 2013)

Document title

The performance of grass filter strips in controlling high-concentration suspended sediment from overland flow under rainfall/non-rainfall conditions

Authors(s) and Affiliation(s)

MA L. (1 2) ; PAN C. (1) ; TENG Y. (1) ; SHANGGUAN Z. (3) ;
(1) Key Lab. of Water Sediment Sciences, College of Water Sciences, Normal Univ., Beijing, CHINE
(2) Key Lab. of Soil and Water Conservation and Desertification Combating of the Ministry of Education, Forestry Univ., Beijing, CHINE
(3) State Key Lab. of Soil Erosion and Dryland Farming on the Loes Plateau, Inst. of Soil and Water Conservation, CAS, Univ., Yangling, CHINE

Abstract

Flume experiments on simulated grass strips were conducted using combinations of 3 slope gradients, 5 slope positions (from upslope to downslope), 2 flow rates and different sediment concentrations under simulated rainfall and non-rainfall conditions. The results showed that sediment deposition efficiency increased with vegetative filter strips (VFS) width as a power function. Rainfall significantly reduced sediment deposited within VFS. Higher sediment concentration corresponded to a larger sediment deposition load but reduced deposition efficiency. Flow rate had a negative effect on deposition efficiency but no effect on deposition load. Sediments were more easily deposited at the upper slope position than downslope, and the upper slope position had a higher percentage of coarse sediments. Flow velocity was the most sensitive factor impacting sediment deposition. The results from this study should be useful to control sediment flowing into rivers in areas with serious soil erosion

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, no13 [pp. 1523-1534]

Bibliographic references : 1 p.

Collation : 8 fig., 4 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3393

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28338321 : Permanent link - XML version
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