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Estimating the nature, timing, and depth of preferential flow in a texture-contrast soil
conference contribution
posted on 2023-05-23, 06:46 authored by Marcus HardieMarcus Hardie, Lisson, S, Richard DoyleRichard Doyle, Cotching, WOccurrence 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.
History
Publication title
Proceedings of the 5th Joint Soil Science Australia and New Zealand Society of Soil Science ConferenceEditors
LL Burkitt and LA SparrowPagination
545-548ISBN
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