Experimental study of flow resistance in a straight open-channel with gravel bed

C. Zeng, Chi Wai Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

An understanding of flow resistance due to gravel bed is the most basic knowledge required by hydraulic engineers for determining stage and discharge characteristics of river courses. In the present study, a laboratory experiment has been carried out in order to investigate the flow resistance law for a straight gravel-bed open-channel with different bed slopes and flow rates. It turns out that roughness length scale (ks) is dependent on the bed slope (S0) and increases as S0increase. The profiles of mean streamwise velocity agree well with the common distribution law. The effects of bed slopes and relative submergence on flow resistance were further analyzed.
Original languageEnglish
Title of host publicationProceedings of the 2nd International Postgraduate Conference on Infrastructure and Environment, IPCIE 2010
Pages75-83
Number of pages9
Volume1
Publication statusPublished - 1 Dec 2010
Event2nd International Postgraduate Conference on Infrastructure and Environment, IPCIE 2010 - Hong Kong, Hong Kong
Duration: 1 Jun 20102 Jun 2010

Conference

Conference2nd International Postgraduate Conference on Infrastructure and Environment, IPCIE 2010
Country/TerritoryHong Kong
CityHong Kong
Period1/06/102/06/10

Keywords

  • Flow resistance
  • Gravel bed
  • Laboratory experiment
  • Straight open channel
  • Velocity profile

ASJC Scopus subject areas

  • Building and Construction
  • Environmental Science(all)

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