Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Measurement and prediction of water movement in a field soil: The matrix-macropore dichotomy

Smettem, K.R.J.ORCID: 0000-0003-2650-4429 and Ross, P.J. (1992) Measurement and prediction of water movement in a field soil: The matrix-macropore dichotomy. Hydrological Processes, 6 (1). pp. 1-10.

Link to Published Version:
*Subscription may be required


The saturated and unsaturated flow properties of a field soil under two tillage treatments were obtained with ponded rings and disc permeameters of dissimilar radii. No difference was observed between tillage treatments but the flow properties displayed a distinct macropore‐matrix dichotomy, with K changing by an order of magnitude as ψ0 went from just ‐ 30 mm to zero. Accurate prediction of time to incipient ponding was achieved using both numerical and analytical models calibrated with field hydraulic properties that were characteristic of the soil matrix. However, extension of the numerical model to the prediction of the wetting front development under non‐ponded conditions was less accurate due to localized preferred wetting It is hypothesized that at this site, localized concentration of rainfall and hence, preferred wetting, May, occur by interception and stemflow associated with lines of standing stubble present in the original seeding slots.

Item Type: Journal Article
Publisher: Wiley
Copyright: © 1992 John Wiley & Sons, Ltd
Item Control Page Item Control Page