WATER ENVIROMENTAL DIAGNOSTIC OF IPANEMA RIVER, SOROCABA / SP

Abstract

The Ipanema river basin is inserted in the water resources management unit 10 (UGRHI's 10 - Sorocaba / Medium Tietê), specifically in the Sorocaba river basin. The Sorocaba river is the most important affluent on the mark left of Medium Tietê, draining an area of 5269 Km2, where the Ipanema river is one of its various affluents of the left mark. The UGRHI 10 covers thirty-four cities, of which eighteen are in the Sorocaba River basin. The development of this cities have grown pollution load released into the Sorocaba River basin, however, at ten years behind many tributaries of the Sorocaba river had good to excellent quality of water, which was reduced by virtue of receiving sewage in natura (no treatment), from land plots located on the outskirts of Sorocaba and other municipality on. The Ipanema river, whose waters are in the process of deterioration in due to the issue of the sewage emission, is a river located in the outskirts of various cities, among them Sorocaba and Araçoiaba da Serra. Thus, the water environmental diagnostic of the river can provide support to initiatives of protection of water ecosystems and water resources. This study was conducted across monthly campaigns in three sampling points along the Ipanema river by period of 2009, in order to understand possible spatial and seasonal variations in the quality of water through analysis of twelve parameters considered significant to measure the quality of the river, being 9 of them used to calculate de Water Quality Index (IQA) and one of them used to calculate the trophic state index (IET). The Ipanema River’s water showed good quality of IQA and some parameters above those stipulated by the CONAMA 357/05 Resolution.