Modelagem hidrológica do alto curso da bacia do rio do campo para obtenção da vazão máxima no Parque Municipal Joaquim Teodoro de Oliveira

Abstract

The use and land occupation in both urban and rural areas have a significant impact on the variation of streamflow. In urban areas, this problem is linked to soil impermeability, while in rural areas, it is due to improper land use management, directly affecting water infiltration and surface runoff. Hydrological data availability is limited to specific locations, and critical data, such as maximum flow rates, are crucial for the management of construction, infrastructure, and urban expansion. For these reasons, this study aimed to conduct hydrological modeling in the upper course of rio do Campo watershed to obtain maximum flow data for the Joaquim Teodoro de Oliveira Municipal Park, located in Campo Mourão - PR. To determine the maximum flow for return periods of 25, 50, and 100 years in the park, two different methods were used: the Soil Conservation Service Curve Number (SCS-CN), performed using the Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) computational software, and the flow regionalization method, executed based on the characteristics of nearby basins and a historical flow series adjusted by the Gumbel distribution. The maximum flow results for the outlet at return periods of 25, 50, and 100 years by the SCS Curve Number method were 124.5 m³∙s⁻¹, 166 m³∙s⁻¹, and 214.5 m³∙s⁻¹, respectively. Using the regionalization method for the same return period, the results were 109.46 m³∙s⁻¹, 132.96 m³∙s⁻¹, and 156 m³∙s⁻¹, respectively. It is concluded that the results obtained were satisfactory for the study when applying the SCS-CN method because it showed greater reliability compared to the regionalization method.