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Estimating the nature, timing, and depth of preferential flow in a texture-contrast soil


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 2012 Australian Society of Soil Science Incorporated

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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:Environmental Management
Objective Group:Other environmental management
Objective Field:Other environmental management not elsewhere classified
UTAS Author:Hardie, M (Mr Marcus Hardie)
UTAS Author:Lisson, S (Dr Shaun Lisson)
UTAS Author:Doyle, R (Associate Professor Richard Doyle)
UTAS Author:Cotching, W (Dr Bill Cotching)
ID Code:77870
Year Published:2012
Deposited By:Agricultural Science
Deposited On:2012-06-02
Last Modified:2017-10-31
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