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EVALUATION OF NATURAL STABLE RIVER DESIGN PROCEDURES
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Paper number 701P0904, . (doi: 10.13031/2013.17362)
Authors: Richard Hey and Dave Rosgen
Several design procedures are available for predicting the three dimensional morphology of natural stable rivers: analytical, empirical and analogue. First analytical, or rational procedures are the most theoretically sound as they are based on the simultaneous solution of a set of process equations which link the three dimensional morphology of the river (bankfull width, mean and maximum depths, slope, sinuosity, meander arc length and velocity) with the controlling boundary conditions (bankfull discharge and bed material load, bed material calibre, bank sediment and vegetation and valley slope). Second, empirical regime equations have been developed from field data using statistical methods. They simply link the variables defining channel form with one or more of the controlling variables. Third analogue, or geomorphological procedures enable designs to be scaled from the morphology of a natural stable reference reach of the required stream type.