Análise hidrológica em bacias hidrográficas no sudoeste do Paraná utilizando o software HEC-HMS

Abstract

This study addresses surface runoff in the watershed areas of the municipalities of Boa Esperança do Iguaçu and Manfrinópolis, located in the southwest of the state of Paraná, with the aim of identifying the factors that influence the occurrence of floods. To achieve this, a methodology was employed that integrated the use of QGIS and HEC-HMS software. QGIS was used for watershed delineation, land use and land cover assessment, and the generation of pedological maps. HEC-HMS was used for hydrological modeling, simulating surface runoff through the Curve Number (CN) method. The absence of streamflow monitoring stations in the watersheds limited the model calibration, requiring the use of data from external stations, which impacted the accuracy of the results. Despite these limitations, the peak flows obtained coincided with periods of higher precipitation, emphasizing the importance of a more robust local monitoring network. The study concludes that strengthening the data collection infrastructure and adopting flood prevention and control policies can mitigate the impacts of floods.