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(Article of periodic en Anglais - 2009)

Document title

Fluvial hydraulics of hyperconcentrated floods in Chinese rivers

Authors(s) and Affiliation(s)

WANG Z.-Y. (1) ; QI P. (2) ; MELCHING C.S. (3) ;
(1) State Key Lab. of Hydroscience and Engineering, Beijing,Univ., Tsinghua, CHINE
(2) Inst. of Yellow River Scientific Research, the Yellow River Commission, Zengzhou, CHINE
(3) Dep. of Civil and Environmental Engineering, Marquette Univ., Milwaukee, ETATS-UNIS

Abstract

Hyperconcentrated floods occur frequently in the Yellow River and its tributaries on the Loess Plateau. This paper studies the fluvial hydraulics of hyperconcentrated floods by statistical analysis and comparison with low sediment concentration floods. The fluvial process induced by hyperconcentrated floods is extremely rapid. Serious channel erosion occurs in narrow-deep channels during hyperconcentrated floods. However, in wide-shallow channels, hyperconcentrated floods may result in serious sedimentation. Moreover, a hyperconcentrated flood may cause the channel to become narrower and deeper, thus, reducing the flood stage by more than 1 m if the flood event lasts longer than one day. The fluvial process during hyperconcentrated floods also changes the propagation of flood waves. Successive waves may catch up with and overlap the first wave, thus, increasing the peak discharge of the flood wave during flood propagation along the river course

Source

Article of periodic

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

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

Millesime : 2009, vol. 34, no7 [pp. 981-993]

Bibliographic references : 1 p.

Collation : 14 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.1789

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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