Show simple item record

dc.contributor.advisorMcTainish, Grant
dc.contributor.authorStrong, Craig L.
dc.date.accessioned2018-01-23T02:29:15Z
dc.date.available2018-01-23T02:29:15Z
dc.date.issued2007
dc.identifier.doi10.25904/1912/852
dc.identifier.urihttp://hdl.handle.net/10072/366379
dc.description.abstractThis thesis explores the role of cyanobacterial crusts in controlling the aeolian erodibility of arid soil surfaces. Soil erodibility estimates are commonly derived from sediment trap measurements or field wind-tunnel simulations. Such estimates are often difficult to relate to crust types and conditions because of the intricate spatial variation inherent with crusts. Similarly, empirical wind-erosion models across a range of spatial scales often fail to incorporate a crust parameter simply because of the complexity associated with both spatial and temporal variations in crustal attributes. The soils of the Channel Country, western Queensland, the site of this study, have intricate mosaics of biological and physical crusts. These arid soils are frequently affected by wind erosion and the role that the presence of the crusts has in controlling erodibility is a largely unknown. The aim of this study has been to address this knowledge gap. It was found that the spatial heterogeneity of the surface features described for the study area claypan supported a diverse range of crust types and cover levels. This diversity varied at sub metre increments. Such spatial diversity is beyond the sensitivity of most common measurement or modelling approaches used in wind erosion research. To overcome this, a specialised Micro Wind Tunnel (MWT) was developed providing a reliable and practical solution measuring erodibility between different crust types. The MWT successfully provided laminar horizontal airflow with and without added saltation material, to specific crust types. Importantly, the size of the MWT was appropriate to the spatial heterogeneity of crust types.
dc.languageEnglish
dc.publisherGriffith University
dc.publisher.placeBrisbane
dc.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
dc.subject.keywordsCyanobacterial crusts
dc.subject.keywordsArid soil surfaces
dc.subject.keywordsMicro Wind Tunnel
dc.subject.keywordsErodibility
dc.subject.keywordsChannel country Queensland
dc.titleEffects of Soil Crusts on the Erodibility of a Claypan in the Channel Country, South-West Queensland, Australia
dc.typeGriffith thesis
gro.facultyScience, Environment, Engineering and Technology
gro.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
gro.hasfulltextFull Text
dc.contributor.otheradvisorBurford, Michelle
dc.contributor.otheradvisorLeys, John
dc.rights.accessRightsPublic
gro.identifier.gurtIDgu1320804041540
gro.source.ADTshelfnoADT0918
gro.thesis.degreelevelThesis (PhD Doctorate)
gro.thesis.degreeprogramDoctor of Philosophy (PhD)
gro.departmentGriffith School of Environment
gro.griffith.authorStrong, Craig


Files in this item

This item appears in the following Collection(s)

Show simple item record