Phi-indices approach and multivariable regression analysis for prediction of discharge in asymmetric straight compound open channel flows

Al-Khatib I. A., GÖĞÜŞ M.

FLOW MEASUREMENT AND INSTRUMENTATION, vol.38, pp.82-91, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38
  • Publication Date: 2014
  • Doi Number: 10.1016/j.flowmeasinst.2014.05.010
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.82-91
  • Keywords: Phi-indices, Compound channel, Division line, Flood plain, Discharge estimation, Regression analysis, RECTANGULAR OPEN-CHANNEL, BOUNDARY SHEAR-STRESS, TURBULENT-FLOW, OVERBANK FLOW, COMPUTATION, DEPTH, PLAIN
  • Middle East Technical University Affiliated: Yes


This study is related to flow measurement structures of asymmetric compound cross section mostly suggested for sediment laden-rivers, streams and wadis. Nine different models of asymmetrical rectangular cross sections were tested for a wide range of discharges. In each model, the stages and corresponding discharges were measured. From these measurements, the average discharges utilizing the Phi-indices Approach were determined. In addition, a multivariable regression model was derived with high accuracy for the prediction of discharge in asymmetric compound channels using five dimensionless parameters.