Abstract: In this paper, double media of groundwater quality models of SO₄^2- and total hardness in karst area of Jian have been built and the combination of Galerkin finite element method with generalized upwind-balance scheme is presented. This method has overcomed the numerical dispersion and the vibration phenomenon. Goodness results are obtained.

Key words: karst area of Jinan, quality model, double media, generalized upwind scheme