HR: 1340h
AN: H43F-0421    [Abstracts]
TI: Description of Contaminant Transport in a Single Fissure With a Lattice BGK Model
AU: Munoz-Carpena, R
EM: carpena@ufl.edu
AF: Agricultural and Biological Engineering Department, University of Florida, IFAS-Tropical Research and Education Center 18905 SW 280 Street , Homestead, FL 33031-3314 United States
AU: Jimenez-Hornero, F J
EM: jihof@arrakis.es
AF: Dept. of Hydraulic Engineering, University of Castilla-La Mancha, C/Califato 21, Ciudad Real, 13071 Spain
AU: Giraldez, J V
EM: ag1gicej@uco.es
AF: Dept. of Agronomy, University of Cordoba, Avda.Menendez Pidal s/n, P.O. Box 3048, Cordoba, 14080 Spain
AU: * Laguna, A M
EM: ana.laguna@uco.es
AF: Dept. of Applied Physics, University of Cordoba, Avda.Menendez Pidal s/n, P.O. Box 3048, Cordoba, 14080 Spain
AB: The transport of contaminants in fractured media is a complex phenomena that has an important impact on the environment. It has been studied for several authors giving rise to different models that have to be used with restrictive boundary conditions. This paper presents a lattice BGK model, evolution of the lattice Boltzmann model, as an alternative to overcome the limitations of the macroscopic approximations. The model has been developed for describing the contaminant transport in a single fissure in a rock matrix and considers the hydrodynamic dispersion along the fissure, the surface sorption onto the surface of the fracture walls and diffusion and sorption within the rock matrix as the main processes. The model is tested using the experimental breakthrough curves obtained for Moreno et al. (1985) and Neretnieks et al. (1982) for natural fissures in granite drill cores, showing a good agreement. According to the results of the sensitivity analysis, the mean tracer residence time is the parameter more influent in the shape of the breakthrough curves.
DE: 1832 Groundwater transport
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting