Análise das áreas de inundação na região sudeste da cidade de Pato Branco - PR

Abstract

Flooding has become a frequent problem in densely urbanized cities, so it is necessary to study areas susceptible to flooding and the factors that contribute to this. In this work, the use and occupation of current and future land was analyzed, considering the maximum occupation allowed by the government, of the sub-basin area of the Rio Ligeiro, where the Bonatto neighborhood is located, in the southeastern region of the municipality of Pato Branco - PR. The grassed areas, Permanent Preservation Areas, forests, plantations, permeable and impermeable urban areas were vectorized under a satellite image from Bing Maps. The Curve Number (CN) was calculated, a parameter that indicates runoff, the percentage of impermeable area, the time of concentration of the sub-basin, the intensity of the project rainfall based on a return period of 25, 50 and 100 years, and the hydrological simulation was performed using the HEC-HMS software. Then, the main river channel was vectored, the sections were created, the TIN surface (Triangular Irregular Network), and the set was exported to the HEC-RAS software. The values obtained in the hydrological simulation, along with the topography, rivers and sections were used in the hydrodynamic simulation. As a result, the Bonatto neighborhood area was flooded, as well as the lowlands, which often suffer from flooding.