Author(s): P. R. Nobar; D. Stavropolou; J. J. R. Williams

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Keywords: No Keywords

Abstract: Mathematical models of flood propagation are now widely used for the solution of any sizable river flow problem and optimization techniques can be used for the calibration of the model parameters to ensure efficient simulation of any real flow problem. Becker and Yeh (1972a, b and 1973) used a least-squares criterion formulation and an influence coefficient method to identify the unknown friction parameters in unsteady open channel flow. They continued with this work (Yeh and Becker, 1973), to use a minimax criterion in the optimization process. Wiggert and Contractor (1976) and Rao, Contractor and Tiyamani (1976) both used gradient-type approaches to optimize the channel section geometry. Fread and Smith (1978) used a gradient-type modified Newton-Raphson algorithm to determine the variation of the unknown friction parameter (in this case Manning's n) with discharge for multiple reach river systems. Haghi-Katibi, Williams and Wormleaton (1988) investigated the effect of data errors on the optimized roughness values.

DOI:

Year: 1993