University of Illinois, Urbana, U.S.A.
*Graduate Assistant in Soil Physics, Agronomy Department, University of Illinois, Urbana; (now Soil Physicist J. N. Agri. Univ., Jabalpur-4, M. P.)
**Research Soil Scientist, USDA, and Professor of Agronomy, Univ. of Illinois
***Former Professor of Soil Physics, Agronomy Department, University of Illinois (now Professor of Soils, Agronomy Department, Colorado State University and Research Soil Scientist, USDA, Fort Collins, Colorado).
Measurements of chloride ion concentration, using a silver—silver chloride electrode system in situ, were made during hydrodynamic dispersion in an unsaturated porous medium. The seepage velocity and solution content of the medium were varied independently. Steady state one-dimensional bulk solution flow, driven only by gravity, was established in a tilted porous bed, which should result in uniform solution content in the bed. The patterns of data obtained were consistent with effects reflecting the presence of stagnant liquid zones.
Chloride, dispersion, porous media
