Water quality assessment with simultaneous Landsat-5 TM data at Guanabara Bay, Rio de Janeiro, Brazil

Abstract

This study aims at determining relationships be- also significant, were found for the low tide condi- tween water quality parameters and digital datation. No correlation was found with chlorophyU-a from the Landsat-5 Thematic Mapper (TM). The concentrations. TM data were shown to be ade- study area was the Guanabara Bay, in Rio de quate to analyze temperature, Secchi depth, total Janeiro, Brazil. Water samples were collected on suspended solids, and iron and manganese contents two dates, coincident with Landsat passages, and in the total suspended solids for the polluted estu- when different tide conditions were present at the ary area studied. Bay. TM Bands 1, 2, 3, 4, and 6, band ratios 1/3 and 2/3, and principal component analysis of TM Bands 1-4 were compared with in situ measure.