CORRELATION AND VARIABILITY OF RAINFALL AND STREAMFLOW IN THE PIQUIRI-PR WATERSHED

Abstract

This study aims a correlation and variability analysis between rainfall and streamflow in the Piquiri-PR watershed. Explain the dynamic among hydrological variables and flood prevention, helps to understand and prevent low agricultural productivity, urban mobility disorders due to flooding, erosion processes, and others. For the development of this research, we used data from Instituto das Águas do Paraná and Agência Nacional de Águas (ANA). The drainage areas were determined by the scope of each fluviometric station and the respective rain gauges, it was realyzed by means of boxplots graphics and statistical correlations the variability analysis of rainfall and streamflow. August presentes the lowest rainfall monthly average, 81,2 mm, while October presents the highest, 192,1 mm. The streamflow monthly average in the Piquiri watershed is 508,4 m3/s. May presentes the highest rainfall variability and October is the month with highest streamflow variability, while March showed the lowest rainfall and streamflow variability. The autocorrelation functions indicate that the action and absence of lag are greater, the correction of a one month low, the scale of weeks or days.