Avaliação do sistema de microdrenagem do terminal rodoviário de Dourados – MS

Abstract

In the construction of microdrainage systems at the neighborhood level, or of a primary urban network, the rational method can be used to determine the maximum design flow rate in basins smaller than 2 km². This paper presents a case study conducted throughout the block of the bus terminal in Dourados - MS, and aims to analyze the condition and capacity of the site's stormwater drainage system. Therefore, if the system is not preventing flooding, a solution will be proposed. Thus, on-site visits were carried out and through notes and photographs taken from the site, as well as measurements, the following information was collected: the location, condition, type, and dimensions of the storm drains, and the geographical position of the study place. Accordingly, it was found that the design flow rate is 7.56 m³/s, the flow rate that the storm drains can convey is 9.61 m³/s, and the reduced flow rate due to solid waste clogging the storm drains is 5.16 m³/s. Moreover, it was observed that most of the storm drains had waste on or inside them, and damaged storm drains were found with some of the grates missing. Therefore, it was concluded that the microdrainage system at the site is not capable of capturing all the stormwater flow generated in heavy rains, and in order to prevent flooding of the area, it is recommended to periodically clean the microdrainage devices.