Avaliação da qualidade da água do rio Infulene

Abstract

The Infulene River Basin expands into neighbourhoods of Maputo and Matola cities and Marracuene District district, which are characterised by informal settlements with high population density. population density. Besides the agricultural and livestock activity, within this basin, there are some industries that are potential sources of pollution to the river and that can compromise the water quality quality of the water, thus becoming necessary its evaluation, being that, for such the sources of pollution were identified, the physico-chemical and microbiological and microbiological characteristics of the water and classified, through the pollution indexes, the same. Two campaigns were carried out, in different seasons (wet and dry), to collect samples at 15 selected points to determine the of samples in 15 selected points for determination and analysis of water quality parameters water quality parameters, where pH, temperature, DO and EC were measured in the field with the aid of a multiparameter instrument, and BOD, COD, phosphates, nitrates, total coliforms total coliforms and E. Coli were determined in the laboratory, giving rise to data that, with with which the IPA was calculated, determining the level of water pollution. By evaluating the IPA, the water of the Infulene River was classified as unpolluted to slightly polluted in areas where agriculture where agriculture is practised, and moderately to severely polluted in areas where there is discharge of effluents from Wastewater Treatment Plants and Industries. The wastewater from the Brewery Industry was classified as severely polluted, and was also designated as the major source of pollution of pollution of this river.