Sidewall and non-uniformity corrections for flume experiments

Research output: Contribution to journalReview articlepeer-review

16 Scopus citations


Studying open channel flow and sediment transport in narrow flumes under non-uniform flow conditions, both sidewall and non-uniformity corrections are required for bed-shear stress. This research first reviews conventional predictive methods for bed-shear stress, including the flow-depth method, the hydraulic radius method and Einstein's sidewall correction. It then presents a novel procedure for sidewall and non-uniformity corrections based on a recent cross-sectional velocity distribution model. These methods are compared with data from the log-law under uniform and non-uniform, sub- and supercritical flow conditions, indicating that (i) the flow-depth and the hydraulic radius methods specify the upper and lower bounds for bed-shear stress; (ii) although Einstein's procedure causes a paradox for smooth flumes, it agrees with data from rough beds; and (iii) the proposed is better than Einstein's for subcritical flow, but the latter has advantage for supercritical flow. As an application, sediment inception under non-uniform flow conditions is also discussed.

Original languageEnglish (US)
Pages (from-to)218-229
Number of pages12
JournalJournal of Hydraulic Research
Issue number2
StatePublished - Mar 4 2015


  • Bed-shear stress
  • Einstein's procedure
  • flume experiment
  • non-uniform flow
  • sidewall correction

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology


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