Nondestructive observations of solution displacement in soils
1986
Grismer, Mark E.
Solution displacement processes are important to irrigated agriculture in salt-affected soils. The experiments described in this paper explore solution displacement processes during transient unsteady flow in unsaturated soil. Changing solution contents and salt concentrations were determined from nondestructive experimental techniques that employed a dual-source gamma-attenuation system. In general, complete displacement of antecedent water by infiltrating solution was observed. Complete displacement, however, depended on the boundary flux and initial solution content of the soil. Dependence of the dispersion coefficient on solution content is also determined from one of the experiments.
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