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A multistaged approach to mapping soil salinity in a tropical coastal environment using airborne SAR and Landsat TM data

Bell, Darren, Menges, Carl H., Bartolo, Renee E., Ahmad, Waqar and van Zyl, J. J. (2001). A multistaged approach to mapping soil salinity in a tropical coastal environment using airborne SAR and Landsat TM data. In: International Geoscience and Remote Sensing Symposium (IGARSS), Sydney, 9-13 July 2001.

Document type: Conference Paper
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Author Bell, Darren
Menges, Carl H.
Bartolo, Renee E.
Ahmad, Waqar
van Zyl, J. J.
Title A multistaged approach to mapping soil salinity in a tropical coastal environment using airborne SAR and Landsat TM data
Conference Name International Geoscience and Remote Sensing Symposium (IGARSS)
Conference Location Sydney
Conference Dates 9-13 July 2001
Place of Publication Piscataway, USA
Publisher The Institute of Electrical and Electronics Engineers
Publication Year 2001
Volume Number 3
ISBN 780370333   (check CDU catalogue  open catalogue search in new window)
Start Page 1309
End Page 1311
Total Pages 3
HERDC Category E2 - Conference Publication - Full written paper, non refereed proceedings (internal)
Abstract This paper provides a methodology to map soil salinity and a recent saline intrusion in the coastal fringe of Kakadu National Park, Australia. A model inversion from AirSAR data to map soil salinity on the bare and partially vegetated floodplain was used. This algorithm has been developed by combining the small perturbation model and the Dubois model to extract the imaginary part of the dielectric constant as an improved indicator of salinity. A vegetation correction to the combined model has been developed to allow salinity extraction from floodplain areas with moderate vegetation cover. Recent saline intrusion areas are often characterised by stands of dead Melalecua (paper bark trees). These are unsuitable for the inversion algorithms due to pronounced corner reflector effects on the radar. These areas were identified with high accuracy using a supervised classification on a fused AirSAR/TM image. The resulting map provides salinity levels for most of the floodplain and clearly identifies recent saltwater intrusion
 
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