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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, W
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.

History

Publication title

Proceedings of the 5th Joint Soil Science Australia and New Zealand Society of Soil Science Conference

Editors

LL Burkitt and LA Sparrow

Pagination

545-548

ISBN

978-0-646-59142-1

Department/School

Tasmanian Institute of Agriculture (TIA)

Publisher

Australian Society of Soil Science Incorporated

Place of publication

Hobart, Tasmania

Event title

5th Joint Soil Science Australia and New Zealand Society of Soil Science Conference

Event Venue

Hobart, Tasmania

Date of Event (Start Date)

2012-12-02

Date of Event (End Date)

2012-12-07

Rights statement

Copyright 2012 Australian Society of Soil Science Incorporated

Repository Status

  • Restricted

Socio-economic Objectives

Other environmental management not elsewhere classified

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