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Subsurface Lateral Flow in Texture-Contrast (Duplex) Soils and Catchments with Shallow Bedrock

Citation

Hardie, MA and Doyle, RB and Cotching, WE and Lisson, S, Subsurface Lateral Flow in Texture-Contrast (Duplex) Soils and Catchments with Shallow Bedrock, Applied and Environmental Soil Science, 2012 Article 861358. ISSN 1687-7667 (2012) [Refereed Article]


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Licenced under Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/

DOI: doi:10.1155/2012/861358

Abstract

Development-perched watertables and subsurface lateral flows in texture-contrast soils (duplex) are commonly believed to occur as a consequence of the hydraulic discontinuity between the A and B soil horizons. However, in catchments containing shallow bedrock, subsurface lateral flows result from a combination of preferential flow from the soil surface to the soil—bedrock interface, undulations in the bedrock topography, lateral flow through macropore networks at the soil—bedrock interface, and the influence of antecedent soil moisture on macropore connectivity. Review of literature indicates that some of these processes may also be involved in the development of subsurface lateral flow in texture contrast soils. However, the extent to which these mechanisms can be applied to texture contrast soils requires further field studies. Improved process understanding is required for modelling subsurface lateral flows in order to improve the management of waterlogging, drainage, salinity, and offsite agrochemicals movement.

Item Details

Item Type:Refereed Article
Research Division:Environmental Sciences
Research Group:Soil Sciences
Research Field:Soil Physics
Objective Division:Environment
Objective Group:Soils
Objective Field:Soils not elsewhere classified
Author:Hardie, MA (Mr Marcus Hardie)
Author:Doyle, RB (Dr Richard Doyle)
Author:Cotching, WE (Dr Bill Cotching)
Author:Lisson, S (Dr Shaun Lisson)
ID Code:57891
Year Published:2012
Deposited By:Agricultural Science
Deposited On:2009-08-21
Last Modified:2017-11-01
Downloads:348 View Download Statistics

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