Soil water residence time and solute uptake 2. Dye tracing and preferential flow predictions.

Trudgill, S.T., Pickles, A.M. and Smettem, K.R.J.ORCID: 0000-0003-2650-4429 (1983) Soil water residence time and solute uptake 2. Dye tracing and preferential flow predictions. Journal of Hydrology, 62 (1-4). pp. 279-285.

Abstract

The occurrence of preferential flow, by-passing soil peds, is predicted from the occurrence of rainfall intensities in excess of pedal sorption; depth of preferential tracer penetration is estimated from the displacement of this excess through a small operational volume of preferential flow, θf. θf-values estimated from column drainage experiments to lie between 0.01 and 0.03 cm3 cm-3 for rainfall intensities from 1 to 10 mm hr.-1, increasing to ∼ 0.1 cm3 cm-3 at saturation. Observed tracer penetration is compared with predicted tracer penetration and mean profile θf-values are calculated. The preferential flow calculations discussed provide a useful approximation for characterising field tracer behaviour.

Item Type:	Journal Article
Publisher:	Elsevier B.V.
URI:	http://researchrepository.murdoch.edu.au/id/eprint/37732

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