= | calendar date representing the actual starting time of the activity of the sources; | |
= | calendar date representing the starting time of the simulation for any particular candidate solution in the optimization model; | |
= | time lag between the first measurement of concentration and a candidate starting time for the source; | |
= | calendar date representing the first concentration measurement obtained from the site; | |
= | time interval between concentration measurements; | |
= | number of concentration measurements available at a given observation location; | |
= | total number of concentration measurement wells; | |
= | time interval between the starting time of the simulation and the starting time of the activity of source; | |
= | seepage or linear pore water velocity; | |
= | volumetric flux of water per unit volume of aquifer representing sources; | |
= | concentration of the sources or sinks; | |
= | porosity of the porous medium; | |
= | chemical reaction term for each of the N species considered; | |
= | pollutant source fluxes; | |
= | absolute difference; | |
= | simulated concentration at observation location iob at time ts; | |
= | observed concentration measurement at observation location iob at time ta; | |
= | perturbed numerically simulated concentration value; | |
= | error term; | |
= | maximum deviation expressed as a percentage; | |
= | random fraction between −1 and +1; |