Summary:

In the article an influence of measurement inaccuracy of longitudinal and transverse dispersivity coefficients on solutions of dispersion equation, which is a basis of mathematical model of pollutant movement in groundwater, was inves-tigated. An analytical solutions of dispersion equation for temporary or constant point source of pollution were used. Inaccuracy of dispersivity coefficients was de-scribed by normal distribution. Multivariable computations for various values of dispersivity coefficients enable to notice that time-space distribution of pollutant concentration depends on parameters of dispersion equation. Maximum coefficients of variation of computed concentrations are situated near boundary of con-taminated region. These are regions of maximum risk of incorrect result of compu-tations. Area average coefficient of variation for constant and temporary source of pollution is non increasing time function. Its denote stability of mathematical model for pollutant movements in groundwater.