Abstract

PULIDO MADRIGAL, L. et al. Salinity monitoring using remote sensing. Terra Latinoam [online]. 2010, vol.28, n.1, pp.15-26. ISSN 2395-8030.

A soil salinity survey was carried out in the Rio Mayo irrigation district (ID) in 1996, using satellite imagery along with an EM-38 electromagnetic (EM) device. Data from Landsat TM imagery were calibrated with field data, according to the plant indicator methodology. This methodology yielded a partial salinity map of the ID, but included only those areas where indicator crops were cultivated. The remaining non-mapped areas were surveyed with an EM-38 electromagnetic device, generating a second partial salinity map. The two partial maps were integrated to obtain a complete soil salinity map of the ID. In 2001, another soil salinity survey was carried out using solely the EM device. The results of both methodologies were analyzed; the 2001 survey results showed less affected area than that conducted in 1996.

Keywords : salinity map; landsat image; electromagnetic sensor; salinity sources.

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