Stage-Discharge Prediction for Straight and Smooth Compound Channels with Wide Floodplains

A modified expression to predict the boundary shear distribution in compound channels is derived and is found to provide significant improved results. The practical method to predict the stage-discharge relationship uses the one-dimensional (1D) approach by taking due care of the momentum transfer. The proposed approach is tested for its validity using available experimental data. Error statistics including standard error and coefficient of determination ( R2 ) are applied to ascertain the effectiveness of the model. The method also gives satisfactory results when applied to two sets of natural river data.

[1]  R. Sellin.  A laboratory investigation into the interaction between the flow in the channel of a river and that over its flood plain , 1964 .

[2]  Elsayed M. Elsawy,et al.  BOUNDARY SHEAR IN CHANNEL WITH FLOOD PLAIN , 1975 .

[3]  P. R. Wormleaton,et al.  Discharge Assessment in Compound Channel Flow , 1982 .

[4]  D. Knight,et al.  Flood Plain and Main Channel Flow Interaction , 1983 .

[5]  R. Townsend,et al.  Comparison of methods for predicting discharge in compound open channels , 1984 .

[6]  D. Knight,et al.  Boundary Shear in Symmetrical Compound Channels , 1984 .

[7]  D. Stephenson,et al.  Effects of momentum transfer in compound channels , 1990 .

[8]  D. Knight,et al.  Turbulent open-channel flows with variable depth across the channel , 1991, Journal of Fluid Mechanics.

[9]  P Ackers,et al.  HYDRAULIC DESIGN OF TWO-STAGE CHANNELS , 1992 .

[10]  P. Ackers.  HYDRAULIC DESIGN OF TWO-STAGE CHANNELS. (WINNER OF 1993 COOPERS HILL WAR MEMORIAL PRIZE). , 1992 .

[11]  G. Christodoulou.  Apparent shear stress in smooth compound channels , 1992 .

[12]  Martin F. Lambert,et al.  ESTIMATING THE DISCHARGE CAPACITY IN STRAIGHT COMPOUND CHANNELS. , 1998 .

[13]  Y. Zech,et al.  Momentum transfer for practical flow computation in compound channels , 1999 .

[14]  Kanhu Charan Patra,et al.  FLOW INTERACTION OF MEANDERING RIVER WITH FLOODPLAINS , 2000 .

[15]  Martin F. Lambert,et al.  Discharge prediction in straight mobile bed compound channels , 2001 .

[16]  Galip Seckin,et al.  A comparison of one-dimensional methods for estimating discharge capacity of straight compound channels , 2004 .

[17]  J. A. Battjes,et al.  Momentum Exchange in Straight Uniform Compound Channel Flow , 2005 .

[18]  Donald W. Knight,et al.  A practical approach to estimating the flow capacity of rivers ‚Äì Application and analysis , 2006 .

[19]  Kejun Yang,et al.  Flow resistance and its prediction methods in compound channels , 2007 .

[20]  Kanhu Charan Patra,et al.  BOUNDARY SHEAR STRESS DISTRIBUTION IN COMPOUND OPEN CHANNEL FLOW , 2007 .

[21]  K. Khatua.  Interaction of Flow and Estimation of Discharge in two Stage Meandering Compound Channels , 2007 .

[22]  Aminuddin Ab. Ghani,et al.  A study of hydraulic characteristics for flow in equatorial rivers , 2008 .

[23]  F. Huthoff,et al.  Interacting divided channel method for compound channel flow , 2008 .

[24]  Donald W. Knight,et al.  Practical Channel Hydraulics: Roughness, Conveyance and Afflux , 2009 .

[25]  Experience of 1D and 2D flood modelling in Australia - a guide to model selection based on channel and floodplain characteristics , 2009 .

[26]  P. Isquith,et al.  Confirmatory factor analysis of the Behavior Rating Inventory of Executive Function-Adult version in healthy adults and application to attention-deficit/hyperactivity disorder. , 2013, Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists.