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University of Arizona (1965)

The temperature and moisture distribution in an unsaturated soil column subjected to surface evaporation

Cordes, Edwin Henry

Titre : The temperature and moisture distribution in an unsaturated soil column subjected to surface evaporation

Auteur : Cordes, Edwin Henry

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1965

Résumé
A number of theoretical concepts have been proposed to account for the transfer of liquid through unsaturated porous medium under isothermal conditions, but it is only recently that theoretical consideration has been given to the simultaneous transfer of both mass and energy0 This study was designed to provide an understanding of het and mass transfer in a soil-water regime and to provide scien tific data applicable to analysis by recent mathematical theories 0 Several flow parameters, including both mass and energy gradients, conductivities, and fluxes were measured under controlled laboratory conditions0 Conductivity measurements followed current procedures described in the literature 0 The transfer of heat and energy operate simultane ously during most dynamic soil moisture flow processes, particularly the drying of a soil column A unique evapora tion regime was designed in which a vertical soil column was subjected to surface evaporation while liquid input was. in duced at the bottom of the column0 It was assumed that a steady-state condition would result when the input and evaporation rate coincided0 Despite the accepted belief, a steady-state condition did not develop as the data indicate

Mots clés : Hydrology. ; Soil moisture. ; Soil temperature.

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Page publiée le 26 janvier 2016, mise à jour le 13 décembre 2017