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(Article of periodic en Anglais - 2008)

Document title

Temporal changes in suspended sediment transport in a gullied loess basin : the lower Chabagou Creek on the Loess Plateau in China

Authors(s) and Affiliation(s)

FANG H.Y. (1 2) ; CAI Q.G. (1) ; CHEN H. (1) ; LI Q.Y. (3) ;
(1) Key Lab. of Water Cycle and Related Land Surface Processes, Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing, CHINE
(2) Graduate School of Chinese Academy of Sciences, Beijing, CHINE
(3) Yantai Inst. of Coastal Zone Research for Sustainable Development, CAS, Yantai, CHINE

Abstract

Using a dataset up to 8 years long in the Lower Chabagou Creek, the variability in suspended sediment load at different temporal scales (within-flood variability, monthly-seasonal and annual) is analyzed in this paper. The results show that, on the within-flood scale, most of the sediment peaks lag behind peak discharges, implying that slope zones are the main sediment source area; independent of the occuring sequences of the peaks of sediment and discharge, all the events could present an anti-clockwise hysteresis loop resulting from the abundant material and the influence of hyperconcentrated flows on suspended sediment concentration. At monthly and seasonal scales, there is a "store-release" process, i.e. sediment is prepared in winter, spring and late autumn, and exported in summer and early autumn. At the annual scale, the high variability in concentration and sediment yield are highly correlated with water yield, resulting from the number and magnitude of floods recorded yearly, and almost all the suspended load is transported during these events

Source

Article of periodic

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

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

Millesime : 2008, vol. 33, no13 [pp. 1977-1992]

Bibliographic references : 2 p.

Collation : 9 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1649

Prodig - Bibliographie Géographique Internationale (BGI)
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