ANÁLISE DO SISTEMA DE MACRODRENAGEM URBANA DO RIBEIRÃO SANTA MARIA E SEUS AFLUENTES EM VARGINHA - MG

Abstract

Flooding and flooding events are natural phenomena that frequently occur in water courses due to disorderly occupation of the population and land use, that is, due to anthropic changes and this usually occurs during times of great rainfall. This work has as main objective to analyze and identify the main causes of floods and floods in the stretches of Santa Maria stream, located in the city of Varginha-MG and to present solutions to remedy them. Initially, it was necessary to collect data on the river basin by means of a planialtimetric survey using the Global Mapper and Google Earth Pro software, identifying that the basin has a compactness factor close to 1.27 representing a risk of flooding . Continuing the analysis of urban drainage at the study site, it was necessary to survey the intensity of precipitation using the pluvial software, and with the help of laser measuring and measuring tape tools to obtain the dimensions of the drainage devices, and later calculations of flow and efficiency of the devices. It was concluded that the local macro-drainage system is inefficient when there is a high intensity of rain, causing floods and floods that are mainly caused by the inability to transport the flow received in the channel and the lack of maintenance that generates a large volume of vegetation, obstructing the same.