Page 230 - Soil and water contamination, 2nd edition
P. 230

Substance transport                                                   217
                    a                                    b





















                    c                                    d




















                                                                                         6642
                                                                                         6642
                                                                                         6642
                   Figure 11.11  Effects of numerical dispersion  a) analytical solution of block front moving from left to right due
                   to advective transport; b) numerical solution; c) analytical solution of a pulse injection moving from the upper left
                   corner in south-east direction; d) numerical solution.





                                                Initial location of particle
                                                New location of particle
                                                Flow line
                                                Computed flow path of particle



                                                                    6642  6642  6642


                   Figure 11.12  Method of characteristics (MOC) (Konikow and Bredehoeft, 1978).









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