An Inversion Method to Estimate Parameters of Canal Water Transport Model Based on Uniform Experiment

摘要

Based on the uniform experimental design theory, an inversion method for estimation of infiltration and roughness parameters of the unsteady flow model of a long distance canal is presented. In order to exactly simulate the unsteady flow transport process in a canal, variations of seepage rate with water transport time and roughness coefficient with canal flow depth are taken into account. In the case of many canal subsections, too many parameters need to be estimated. According to the practical considerations of the Emergency Project of diversion Yellow River water to Tianjin and uniform experiment theory, we designed a uniform experiment for estimation of 19 parameters for 6 canal sections. We set 10 levels for each parameter, and an unsteady flow calculation approach and observed data are used for parameter estimation. The results show that the proposed method can reduce calculation complexity and yield acceptable parameter estimates.