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Hydropedology of the Tasmanian texture-contrast soils
conference contribution
posted on 2023-05-23, 06:45 authored by Marcus HardieMarcus Hardie, Richard DoyleRichard Doyle, Lisson, S, Cotching, WThe 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.
History
Publication title
Proceedings of the 5th Joint Soil Science Australia and New Zealand Society of Soil Science ConferenceEditors
LL Burkitt and LA SparrowPagination
739-742ISBN
978-0-646-59142-1Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Australian Society of Soil Science IncorporatedPlace of publication
Hobart, TasmaniaEvent title
5th Joint Soil Science Australia and New Zealand Society of Soil Science ConferenceEvent Venue
Hobart, TasmaniaDate of Event (Start Date)
2012-12-02Date of Event (End Date)
2012-12-07Rights statement
Copyright 2012 Australian Society of Soil Science IncorporatedRepository Status
- Restricted