Erosión y desertificación.-Monitoreo de la salinidad en el Distrito de Riego 038 Río Mayo, Sonora, México, mediante sensores remotos

Abstract

ABSTRACT 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 including 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. Both partial maps were integrated to get 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, resulting in less affected areas in 2001 compared to those obtained in 1996.