The effect of water transposition on the quality of water in a tropical reservoir, São Paulo – Brazil

Abstract

The aim of the present study is to analyze the influence of water transposition from Rio Grande System on the quality of water in Taiçupeba Reservoir, Suzano city, SP. Water samples were collected every two months for one year (from June 2016 to April 2017) in four sampling spots. Physical, chemical and biological water analyses were carried out; Water Quality and Trophic State indices were also applied. There was influence of water transposition from Rio Grande System on the quality of the water in Taiaçupeba Reservoir throughout the assessed period. The quality of the water was similar in all sampling spots, except for P3, which recorded the worst results. Point 3 was located in an urbanized zone of Taiaçupeba sub-basin; therefore, it is likely that the worse water quality in this spot has resulted from contamination by domestic sewage. It is recommended to carry out further studies based on longer sampling period in the same environment.

Keywords

• water quality index
• trophic state index
• land use and occupation.