Towards development of a risk management tool for roads affected by dryland salinity.

G. J. Street

doi:10.1071/ASEG2007ab142

ISSN: 2202-0586
E-ISSN:

oa Towards development of a risk management tool for roads affected by dryland salinity.
Authors G. J. Street^a
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^a Dept of Applied Geophysics, Curtin University of Technology and GeoAg Pty Ltd, PO Box 102 Cottesloe WA, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2007, Issue ASEG2007 - 19th Geophysical Conference, Dec 2007, p. 1 - 3
DOI: https://doi.org/10.1071/ASEG2007ab142
- Published online: 01 Dec 2007

Abstract

Summary

There is a popular assumption that damage to roads due to high soil salinity is one of the greatest economic effects of dryland salinity. There is little scientific evidence to back up these claims. The effect of salt on road materials is not documented or understood. This study started as an attempt to develop a risk management tool for roads in saline areas using geophysical techniques. EM38 and EM31 surveys were carried out effectively and safely on major and minor rural roads. They relate to changes in salt content in the road basecourse and underlying subgrade. The lack of scientific understanding of the effects of salt on road material has resulted in a focus on understanding how the road is affected. Mineralogical and geochemical changes are indicated that may result in volumetric and strength changes to the road pavement but more work is needed.

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2007-12-01

2026-01-22

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References

Broadfoot, K, Morris, M., Stevens, D. and Heuperman A., 2002, The role of EM38 in land and water management planning on the Trargowal Plains in Northern Victoria, Exploration Geophysics 33, 90-94.
Davis, O. 2005. Investigating the Impact of Salinity on Western Australian Roads. Report to Department of Science and Innovation. Summer 2004/2005
Furian, S., Barbiero, L,. Boulet, R., Curmi, P., Grimaldi, M. and Grimaldi, C. 2002. Distribution and dynamics of gibbsite and kaolinite in oxisol of Serra do Mar, southeastern Brazil. Geoderma, v. 106: 83–100.
McNeil, J.D., 1980. Electromagnetic terrain conductivity measurements at low induction numbers. Technical Note TN-6 Geonics Ltd (see www.geonics.com)
Obika B, Freer-Hewish RJ and Fookes PG (1989) Soluble salt damage to thin bituminous road and runway surfaces. Quarterly Journal of Engineering Geology 22 59-73.
Rutherford, J. and Street. G.J. 2006, Mineralogical and chemical changes in road subgrade induced by waterlogging and salinisation — Chemical reaction precursors to road seal failure in southwestern Australia. Unpub report Geog Pty Ltd.
Street, G.J and Petrusma, A.P., 2004, Preliminary investigations into failure of road pavement above shallow saline groundwater. In Proceedings of 1st National Salinity Engineering Conference9–12 November 2004, Perth, Western Australia. Aust. Inst. of Eng.

/content/journals/10.1071/ASEG2007ab142

Article Type: Research Article

Keyword(s): EM; Geochmistry.; Risk management; Roads; Salinity

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oa Towards development of a risk management tool for roads affected by dryland salinity.

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