Desempenho do sistema de microdrenagem: estudo de caso no Bairro do Alecrim/Natal-RN

Abstract

The urbanization process without proper planning leads to a variety of problems, affecting both the environment and the quality of life of the population. Among the main issues are high rates of impermeable surfaces, which contribute to increased surface runoff and may result in flooding. To address this problem, an efficient drainage system is necessary, ensuring everything from proper collection through storm drains to final disposal. This study aims to analyze and propose improvements to the existing micro-drainage system at the intersection of Presidente Leão Veloso Avenue and Dr. Manoel Miranda Avenue, in the Alecrim neighborhood of Natal-RN, an area that has experienced flooding during heavy rainfall in recent years. The methodology used in this study included a topographic survey and analysis of the contributing basins of the storm drains in the area, with the goal of comparing the runoff flow rate to the hydraulic efficiency of the existing infrastructure. Based on the collected data, it was found that the efficiency of the installed storm drains is lower than the required flow rate. As a result, the study discussed possible reasons for this outcome, such as differences in the parameters used in the original drainage design, including return periods and runoff coefficients that differ from those adopted in this research. In addition, technical solutions were proposed to enhance the performance of the storm drains, and the importance of periodic maintenance and regular cleaning especially at the beginning of the rainy season.