HR: 1330h
AN: H43B-09    [Abstracts]
TI: Natural Advection In Porous Media: Transfer of Soil Moisture Beneath a Tree
AU: Mandock, R L
EM: rmandock@cau.edu
AF: Earth System Science Program, Department of Physics, Clark Atlanta University, 223 James P. Brawley Drive, SW Mail Stop 241, Atlanta, GA 30314 United States
AU: Chen, D
EM: dchen@cau.edu
AF: Department of Engineering, Clark Atlanta University, 223 James P. Brawley Drive, SW, Atlanta, GA 30314 United States
AU: * Williams, J
EM: jawill2007@hotmail.com
AF: Department of Engineering, Clark Atlanta University, 223 James P. Brawley Drive, SW, Atlanta, GA 30314 United States
AB: At a suburban site in Atlanta, Georgia, soil temperature and moisture data were acquired at different soil depths over a six-week period. These measurements were made in support of an experiment to study the periodic response of sweetgum trees to transpiration and groundwater availability. Given that the temperature and water content was known at different depths, the vertical energy and moisture balance of the soil could be observed as a function of depth. For the numerical study of natural advective heat transfer in porous media, researchers at Clark Atlanta University have developed a two-dimensional finite element numerical model for transient or steady state analysis of coupled processes of advective and conductive heat transfers in a porous continuum and advective groundwater flow in a saturated porous medium. The governing equations consist of a set of coupled, quasilinear partial differential equations that are based on the physical laws of fluid continuity and conservation of momentum and energy. The numerical simulation results are compared with experimental data in the vertical. The results show that the numerical simulation of advective heat transfer of water in porous media agrees well with the experimental data. The results of the advective groundwater simulation are used to explain the distortion of the diurnal response of sweetgum trees to evapotranspirative pumping.
DE: 1899 General or miscellaneous
SC: Hydrology [H]
MN: 2005 Joint Assembly