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Hydropedology and preferential flow in the Tasmanian texture-contrast soils
Citation
Hardie, M and Doyle, R and Cotching, W and Holz, G and Lisson, S, Hydropedology and preferential flow in the Tasmanian texture-contrast soils, Vadose Zone Journal, 12, (4) pp. 1-14. ISSN 1539-1663 (2013) [Refereed Article]
Copyright Statement
Copyright 2013 Soil Science Society of America
DOI: doi:10.2136/vzj2013.03.0051
Abstract
The two-way interaction between soil morphology and the processes governing soil water movement were investigated for a range of texture-contrast soil profiles. The texture-contrast soils consisted of a seasonally water-repellent sandy loam A1 horizon over a bleached silica-cemented A2e horizon and a mottled vertic clay subsoil. Differences in soil morphology and structure among sites had little influence on the proportion of soil that participated in infiltration or the maximum depth of infiltration; however, differences in subsoil structure influenced the processes by which water infiltrated and was stored within the
B2 horizons. The occurrence of preferential flow was largely controlled by the effects of antecedent soil moisture content on water repellence in the A1 horizon, silica bridging in the A2e horizon, and clay shrinkage in the B2 horizons. Under dry soil conditions, infiltration resulted from up to five different forms of preferential flow. When soils were near field capacity, most forms of preferential flow ceased; however, wetting front instability and
lateral flow developed in the A1 horizon. Preferential flows are not thought to have contributed to the pedogenesis of the texture-contrast soils. Development of the contrasting soil texture horizons, sand infills, and bleached A2e horizons developed before and independently of the observed preferential flow processes in which reworked aeolian sands buried previously developed clay columns.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | hydropedology, preferential flow, Tasmania, soil |
| Research Division: | Environmental Sciences |
| Research Group: | Soil sciences |
| Research Field: | Soil sciences not elsewhere classified |
| Objective Division: | Environmental Management |
| Objective Group: | Terrestrial systems and management |
| Objective Field: | Terrestrial systems and management not elsewhere classified |
| UTAS Author: | Hardie, M (Mr Marcus Hardie) |
| UTAS Author: | Doyle, R (Associate Professor Richard Doyle) |
| UTAS Author: | Cotching, W (Dr Bill Cotching) |
| UTAS Author: | Holz, G (Dr Greg Holz) |
| UTAS Author: | Lisson, S (Dr Shaun Lisson) |
| ID Code: | 88136 |
| Year Published: | 2013 |
| Web of Science® Times Cited: | 19 |
| Deposited By: | Tasmanian Institute of Agriculture |
| Deposited On: | 2014-01-13 |
| Last Modified: | 2017-10-31 |
| Downloads: | 0 |
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