Author(s)

M. Putti, S. Ferraris, C. Pamconi, G. Pini & G. Gambolati

Abstract

In this paper we describe the finite element codes for two three-dimensional mod- els of reactive transport in groundwater. The transport models are linear and in- clude advection, dispersion, decay, and sorption. Sorption under both equilibrium (LEA3D code) and nonequilibrium (NONLEASo) conditions is considered. In the latter case a "dual porosity" concept is used that subdivides the porous medium into five distinct interacting regions. The coupled model for nonequilibrium sorp- tion is solved using an integro- differential approach. The large sparse systems of equations generated by the finite elem

Keywords