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Estimating the nature, timing, and depth of preferential flow in a texture-contrast soil
Citation
Hardie, M and Lisson, S and Doyle, R and Cotching, W, Estimating the nature, timing, and depth of preferential flow in a texture-contrast soil, Proceedings of the 5th Joint Soil Science Australia and New Zealand Society of Soil Science Conference, 2-7 December 2012, Hobart, Tasmania, pp. 545-548. ISBN 978-0-646-59142-1 (2012) [Refereed Conference Paper]
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Copyright Statement
Copyright 2012 Australian Society of Soil Science Incorporated
Official URL: http://www.soilscience2012.com/
Abstract
Occurrence of preferential flow in soil is known to increase the risk of off-site agrochemical mobilisation to groundwater and waterways. This study investigated the ability of a commercially available soil moisture probe to determine the timing, depth and magnitude of preferential flow events in a texture-contrast soil. Occurrence of preferential flow was not related to rainfall magnitude nor rainfall intensity, rather preferential flow occurred when antecedent soil moisture was below 70-76 % of total soil moisture. High frequency soil moisture monitoring over a 21 month period was able to determine the timing, depth and wetting front velocity of preferential flow events. However the spatial variability of the preferential flow paths meant that two to three soil moisture probes were required to determine changes in soil moisture or the preferential flow flux.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | macropore flow, finger flow, funnel flow, duplex soil, EnviroSCAN |
| Research Division: | Environmental Sciences |
| Research Group: | Soil Sciences |
| Research Field: | Soil Physics |
| Objective Division: | Environment |
| Objective Group: | Land and Water Management |
| Objective Field: | Land and Water Management of environments not elsewhere classified |
| Author: | Hardie, M (Mr Marcus Hardie) |
| Author: | Lisson, S (Dr Shaun Lisson) |
| Author: | Doyle, R (Dr Richard Doyle) |
| Author: | Cotching, W (Dr Bill Cotching) |
| ID Code: | 77870 |
| Year Published: | 2012 |
| Deposited By: | Agricultural Science |
| Deposited On: | 2012-06-02 |
| Last Modified: | 2014-08-19 |
| Downloads: | 2 View Download Statistics |
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