1887
Volume 33, Issue 2
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

This paper discusses strategies for improving interpretation outcomes from large, multivariate data suites. It is shown that a systematic approach using simple spatial analysis techniques implemented in a geographic information system reveals information that is not readily evident using conventional, manual interpretation procedures. A combination of simple exploratory analysis, principal components analysis and unsupervised classification is used to represent the landscape as a series of geophysical/terrain units. A comparison of these classified units with the distribution of surface salinity reveals that the classification is not just an arbitrary division of the landscape, but one clearly related to the properties of the landscape relevant to salinity. This result is important for two reasons. First, it demonstrates a fast, systematic, robust and repeatable process for successfully extracting information from the multivariate data suite. This result would not be achievable using the conventional interpretation approach. Second, it provides a useful summary and clear representation of multivariate geophysical data, which when applied appropriately could significantly improve the utility of the data for land management planning.

Loading

Article metrics loading...

/content/journals/10.1071/EG02057
2002-06-01
2026-01-14
Loading full text...

Full text loading...

References

  1. Anderson, A., Dodds, A.R., McMahon, S. and Street, G.J., 1993, A comparison of airborne and ground electromagnetic techniques for mapping shallow zone resistivity variations: Expl. Geophys., 24, 323-332.
  2. Anderson, S., Street, G. and Anderson, H., 1996, The use of airborne geophysics to understand the salinity processes and develop a land management plan on a farm in the South West of Western Australia: Proceedings of 4th National Conference andWorkshop on the Productive Use and Rehabilitation of Saline Lands, Albany, Western Australia, 76-85.
  3. Anderson-Mayes, A., 1999, Enhancing interpretation of multivariate airborne geophysical data for dryland salinity studies: Ph.D. thesis, University of Queensland (unpublished).
  4. Bonham-Carter, G.F., 1994, Geographic Information Systems for Geoscientists - Modelling with GIS: Pergamon, New York.
  5. Buselli, G. and Williamson, D.R., 1996, Modeling of broadband airborne electromagnetic responses from saline environments: Geophysics, 61, 1624-1632.
  6. Clarke, C.J., George, R.J., Bell, R.W. and Hobbs, R.J., 1998, Major faults and the development of dryland salinity in the western wheatbelt of Western Australia: Hydrology and Earth System Sciences, 2, 77-91.
  7. de Broekert, P., 1996, An assessment of airborne electromagnetics for hydrogeological interpretation in the wheatbelt, Western Australia: Resource Management Technical Report No. 151, Agriculture Western Australia.
  8. Dickson, B.L., Fraser, S.J. and Kinsey-Henderson, A., 1996, Interpreting aerial gamma-ray surveys utilising geomorphological and weathering models: Jour. of Geochem. Expl., 57, 75-88.
  9. Dickson, B.L. and Scott, K.M., 1997, Interpretation of aerial gamma-ray surveys - adding the geochemical factors: AGSO Journal of Australian Geology and Geophysics, 17, 187-200.
  10. Environmental Systems Research Institute, 1991, ARC/INFO User Guide - Cellbased Modeling with GRID: ESRI.
  11. Engel, R., McFarlane, D.J. and Street, G., 1987, The influence of dolerite dykes on saline seeps in south-western Australia: Aust. Jour. of Soil Res., 25, 125-36.
  12. Green, A., 1998, The use of multivariate statistical techniques for the analysis and display of AEM data: Expl. Geophys., 29, 77-82.
  13. Jensen, J.R., 1996, Introductory Digital Image Processing: A Remote Sensing Perspective (2nd Edition): Prentice-Hall.
  14. Leeming, P.M., Roberts, G., Bertoli, M., Anderson, H. and Street G., 1994, Interpretation Report - SALTMAP Survey, Broomehill Landcare District: World Geoscience Corporation, Perth, (unpublished).
  15. Nulsen, B., Beeston, G., Smith, R. and Street, G., 1996, Delivering a technically sound basis for catchment and farm planning - addressing the biophysical component: Proceedings of WALIS Forum '96, Perth, Australia, 66-71.
  16. Odins, J.A., Beckham, J. and O'Neill, D.J., 1995, Supplementary ground geophysics for airborne electromagnetic salinity survey over Jemalong-Wyldes Plains area: Expl. Geophys., 26, 195-201.
  17. Papp, E. and Baxter, R., 2002, Factor analysis and factor score imaging of transient electromagnetic model responses over simple geometric bodies: Expl. Geophys., 33, 44-50.
  18. Parasnis, D.S., 1997, Principles of Applied Geophysics (5th Edition): Chapman and Hall.
  19. Street, G.J., 1992, Airborne geophysical surveys - applications in land management: Expl. Geophys., 23, 333-338.
  20. Street, G.J. and Duncan, A.C., 1992, The application of airborne geophysical surveys for land management: 7th ISCO Conference Proceedings, 762-770.
  21. Taylor, M.J., Smettem, K., Pracilio, G. and Verboom, W., 2002, Investigation of the relationships between soil properties and high-resolution radiometrics: (this volume).
  22. World Geoscience Corporation, 1996, Broomehill SALTMAP Project, Salt Hazards, Salt Hazard Report No. 1: World Geoscience Corporation, Perth (unpublished).
/content/journals/10.1071/EG02057
Loading

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error