Method for analyzing a longitudinal dispersion mechanism of pollutant in a river using time-splitting method

摘要

The present invention relates to the initial concentration of the method of analyzing the longitudinal dispersion process contaminants in the stream by using the time separation technique, the configuration (a) channels in a grid model, and in this moment the injection channel Line Source C _o Wow Mixing time t _m is inputted and stored as input data; (b) calculating and storing the lateral distribution of the flow velocity satisfying a certain equation for each lattice; (c) Initial concentration C _o of step (a) A lattice to which the grid is allocated is moved by a distance calculated by the product of the flow rate for each lattice in the step (b) and the mixing time t _m to complete the longitudinal transfer; (d) reassigning an average value of concentrations in each column of the lattice model to indicate a state in which all of the transverse dispersions are completed after the longitudinal transfer of step (c) is completed, and the concentration distribution is stored for each lattice; and (e) The grids with the reallocated concentration distributions are again moved by the distance calculated by the product of the grating velocity and the mixing time t _m until the longitudinal conveyance reaches the boundary of the simulated area of the channel and is transversely distributed. Since the average value of the concentration is assigned and the concentration distribution is stored, the physical process of the contaminant mixing can be accurately explained, thereby producing a more reliable analysis result.