Caracterização espectral e termométrica dos solos afetados por sais, de parte da baixada de Sousa, Estado da Paraíba.

Abstract

The present study was conducted in the Northwest of the State of Paraiba, Brazil, among the parallels 06° 41* 34" and 06° 52" 32" S and the meridians 38° 02' 46" and 38° 22' 4 1 " W, including partially the municipal districts of Aparecida, Marizopolis, Sao Francisco and Sousa, embracing 738,62 km2 approximately. The main objective was to use the TM/Landsat-5 images and determination of superficial temperatures to detect salt affected soils. In the visual interpretation a RGB composition of the bands TM3, TM4, TM5 and TM6 (thermal) was used, aided by a Geographical Information System (GIS) and field data. As final result, it a map was obtained where approximately 34,15 % of the mapped area were soils affected salt.