|Title||Utilité des images RSO multipolarisées pour l'hydrogéologie en milieu semi-aride|
|Author||Saint-Jean, R; Singhroy, V|
|Source||ACFAS 1999 (Association canadienne francaise pour l'avancement des sciences); 1999.|
|Alt Series||Earth Sciences Sector, Contribution Series 20042732|
|Abstract||In this study, we assess the information content of synthetic aperture radar (SAR) images in HH, VV, VH and HV polarization with a view to determining which of these polarizations is best suited for use
in the detailed mapping of ouadis drainage systems. A good understanding of a drainage system makes it easier to decide where to locate floodwater retention dykes, an approach that has been used with some success in Jordan.|
multipolarized SAR images from an airborne survey conducted in 1993 in the context of a GlobeSAR-1 project. The images are analyzed to bring out as much hydrogeological information as possible. Results indicate that the contrast and detail provided
by cross-polarization (HV or VH) and, to a lesser degree, HH polarization are useful in mapping the hydrographic network where vegetation is found in the ouadis (dried rivers). VV polarization is not as sensitive to vegetation; however, it is more
effective for purposes of locating the ouadis boundary and mapping surface roughness in playas.
This study is part of preparations for the RADARSAT-2 SAR sensor, which is to go into commercial operation in early 2002 and which will supply
like-polarized and cross-polarized images at a resolution similar to that used in this study.