Groundwater simulation apparatus and mass transport parameter determination method for groundwater simulation

摘要

PROBLEM TO BE SOLVED: To accurately determine a material transport parameter by a few of simulations. SOLUTION: The device comprises a material transport analyzing means 10 calculates the distribution of concentration of each material of a plurality of kinds or concentration at a specified point, corresponding to elapsed time, using a plurality of kinds using aL from a dispersion coefficient aL of an object material in the flow direction, which is the model element of an advection dispersion delaying model, a desired fixed value r0 as Rd from a delay coefficient Rd; and a determination means 10, which using the concentration distribution of the material in underground water which is obtained by actual measurement at an analyzing point with a required elapsed time m or material concentration at the specified point as an actually measured value information, compares the actually measured value information with the calculation result, by a material transport analyzing means to then select a calculation result having higher similarity to the actually measured value information from calculation results, and determines the dispersion coefficient in the flow direction, that is used for obtaining the calculation result as the dispersion coefficient in the flow direction, to then calculate a delay coefficient from the elapsed time n corresponding to the calculation result and the elapsed time m in the actual measurement as r0m/n.