Methodology for Estimating Streamflow by Water Balance and Rating Curve Methods Based on Logistic Regression

Both water balance (WB) and rating curve (RC) are methods for estimating streamflow. The first is mostly used to estimate reservoir outflows, while the second usually adopted in hydrometeorological network streamflow gauges. While WB uses hourly collected data, RC estimates using current level extrapolation techniques. objective of this study was analyze variations reservoir’s outflow at Queimado Hydroelectric Power Plant (HPP Queimado) propose a method evaluate whether daily obtained by method, similar flow values conventional station. logistic regression (LR) model because it that adopts binary, categorically dependent variables identify event interest. results showed streamflow, from an average two readings, were good representation flows region. LR able atypical especially rainy season. This means data consistency analysis can be faster safer, when adequately employed considering proposed conditions, contributing both management policies resources.