Impacto de diferentes métodos de estimativa de intensidade de chuvas no dimensionamento hidráulico de obras de drenagem na rodovida BR-050/MG

Abstract

The proper design of highway drainage systems is a determining factor for the protection of the roadway structure and for ensuring the operational safety of users. In this scenario, the specific design of macro-drainage and surface drainage devices is a process highly dependent on the accuracy of hydrological estimates for intense rainfall. In highway engineering practice, the selection of rainfall parameters representative of local conditions constitutes a fundamental step in the design of drainage works, influencing both operational safety and implementation costs. In this context, the primary objective of this study is to analyze the influence of choosing different Intensity-Duration-Frequency (IDF) relationships on the design of macro-drainage and surface drainage devices. Using two catchment basins intercepted by the BR-050 highway (located at km 43 and km 65) in the municipalities of Uberlândia/MG and Araguari/MG as the object of study, the design flow rates were estimated using the Rational Method, adopting Kirpich's empirical equation to calculate the time of concentration. Based on this, the research proposes to compare the geometric and hydraulic parameters resulting from the application of a regional normative reference rainfall equation against models specifically adjusted to the local climatic reality.