HR: 0800h
AN: H21E-1398    [Abstracts]
TI: Solute Transport in the Root Zone: Problem Formulation and Analytical Solutions
AU: * Skaggs, T H
EM: tskaggs@ussl.ars.usda.gov
AF: George E. Brown, Jr. Salinity Laboratory, USDA-ARS, 450 W. Big Springs Rd., Riverside, CA 92506 United States
AU: Pontedeiro, E M
EM: bettymay@cnen.gov.br
AF: Brazilian Nuclear Energy Commission, Rua General Severiano 90, Botafogo, CP 22294-900, Rio de Janeiro, 22294-900 Brazil
AU: van Genuchten, M T
EM: rvang@ussl.ars.usda.gov
AF: George E. Brown, Jr. Salinity Laboratory, USDA-ARS, 450 W. Big Springs Rd., Riverside, CA 92506 United States
AU: Jarvis, N
EM: nick.jarvis@mv.slu.se
AF: Swedish University of Agricultural Sciences, P.O. Box 7014, Uppsala, 750 07 Sweden
AU: Cotta, R M
EM: cotta@serv.com.ufrj.br
AF: Universidade Federal do Rio de Janeiro, Cidade Universitaria CP 68503 , Rio de Janeiro, 21945-970 Brazil
AB: Solute transport through the vadose zone can be described with the one-dimensional convection-dispersion equation (CDE). Analytical solutions are widely available for the classical formulation of the CDE that accounts for convection, diffusion and dispersion, linear equilibrium adsorption, zero-order production, and first-order decay or degradation processes. In the root zone, transport may be affected by additional processes, including depth dependent rates of degradation and the uptake of water and solute by roots. We formulate transport equations accounting for these processes and present analytical and numerical solutions for various boundary conditions.
DE: 1832 Groundwater transport
DE: 1842 Irrigation
DE: 1847 Modeling
DE: 1875 Vadose zone
SC: Hydrology [H]
MN: Fall Meeting 2005