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Hydropedology of the Tasmanian texture-contrast soils


Hardie, M and Doyle, R and Lisson, S and Cotching, W, Hydropedology of the Tasmanian texture-contrast soils, Proceedings of the 5th Joint Soil Science Australia and New Zealand Society of Soil Science Conference, 2-7 December 2012, Hobart, Tasmania, pp. 739-742. ISBN 978-0-646-59142-1 (2012) [Refereed Conference Paper]

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Copyright 2012 Australian Society of Soil Science Incorporated

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The texture-contrast soils are extensively used for agricultural production in Australia, however the processes governing infiltration and soil water distribution in these soils are poorly understood. This manuscript reports surprisingly complex interactions between soil morphology, antecedent soil moisture and preferential flow processes in a series of texture contrast soils. The occurrence of preferential flow was strongly influenced by antecedent soil moisture, not rainfall intensity as is often reported in the literature. In dry soil conditions infiltration resulted from up to five different forms of preferential flow including; finger flow, rivulet flow, macropore flow and saturated backfilling of voids at the base of the soil profile. When soils were at moisture contents near field capacity infiltration was mostly uniform, however wetting front instability and lateral flow in the A1 horizon developed due to difficulty displacing existing soil moisture further down the soil profile.

Item Details

Item Type:Refereed Conference Paper
Keywords:pedology, duplex, macropore flow, finger flow, preferential flow, subsurface lateral flow
Research Division:Environmental Sciences
Research Group:Soil sciences
Research Field:Soil physics
Objective Division:Environmental Management
Objective Group:Other environmental management
Objective Field:Other environmental management not elsewhere classified
UTAS Author:Hardie, M (Mr Marcus Hardie)
UTAS Author:Doyle, R (Associate Professor Richard Doyle)
UTAS Author:Lisson, S (Dr Shaun Lisson)
UTAS Author:Cotching, W (Dr Bill Cotching)
ID Code:77868
Year Published:2012
Deposited By:Agricultural Science
Deposited On:2012-06-02
Last Modified:2017-10-31
Downloads:7 View Download Statistics

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