Monitoramento físico-químico dos lagos Jará e Piranha, localizados no município de Juruti - Pará

Abstract

Water is extremely important for the survival of living beings and knowing its quality is important for safe use in certain activities. The National Environmental Council – CONAMA, pre-establishes values for parameters portrayed for each type of water classification and its proper purpose, which reflect its quality. The present work portrays the monitoring of salinity, pH, electrical conductivity, total dissolved solids and temperature carried out in two lakes in the municipality of Juruti, western Pará: Lake Jará and Piranha, in order to verify possible changes resulting from anthropic actions or climate. The study began in June and ended in October. A significant variation in the studied parameters was observed with the reduction in the volume of water in the reservoirs. However, the results obtained for the parameters salinity, electrical conductivity, total dissolved solids and temperature are within the limits established by CONAMA Resolution No. 357. On the other hand, the pH of both lakes dropped significantly over the monitoring days and reached acidity levels below those predicted by CONAMA. Thus, this anomalous drought has affected the water quality of the two lakes studied. More studies should be developed in order to evaluate the influence on fishing activities, irrigation of vegetation and leisure activities.