Free overfalls in flat-based circular and U-shaped channels

SV Nabavi, MK Beirami, MR Chamani, Mark Sterling

Research output: Contribution to journalArticle

11 Citations (Scopus)


This paper presents a theoretical model based on the free vortex theorem that is capable of predicting the pressure head distribution at the brink of free overfalls in open channels. This approach is coupled with the momentum equations to obtain the end-depth-ratio (EDR) from which the discharge can be estimated. In order to illustrate its flexibility, the theory is successfully applied to flat-based circular and U-shaped channels. Using previous experimental data, the proposed method is validated. (C) 2010 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)17-24
Number of pages8
JournalFlow Measurement and Instrumentation
Issue number1
Publication statusPublished - 1 Mar 2011


  • Hydraulics
  • Open channel flow
  • Steady flow
  • One dimensional flow
  • Flow measurement


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