Avaliação do sistema de drenagem urbana utilizando os indicadores de fragilidade: estudo de caso na estrada do Pimenta no bairro do Alto do Calhau em São Luís- MA

Abstract

The urban drainage system is seen as a series of measures with the intention of reducing the risks that the population is resolved, minimizing the losses generated by the floods, in addition to enabling harmonious, articulated and sustainable urban development. A well-dimensioned drainage system is part of a set of improvements available for urbanized areas. This explanatory study aims to verify which factors interfere with the functionality of the urban rain drainage system of Estrada do Pimenta in the Alto do Calhau neighborhood, discussing its functionality through the system's fragility index methodology. The methodology for its construction uses a pertinent literature bulletin to find the assumptions that supported the subject in focus. Then, the survey carried out through on-site visits from January to August 2020, to obtain the information through photographic records. An analysis of the data (photographs) took place in conjunction with an analysis of maps (as well as contour lines, elevation profile and altimeter map of the location and surroundings) and the history of the region (as well as rainfall and flooding cases ), which were fundamental tools to decide the six defined flooding points demarcated on Estrada do Pimenta and the application of the System Fragility Index based on environmental, technological and institutional factors, the values relative to the General Fragility Index at the indicated points being adequate. The results indicated high values corresponding to these indicators, the most obliged points (with greater IFS in relation to the drainage system) were the PE - 02 and PE - 03, the data related to the most known problems of the road, requiring the most appropriate measures. fast as possible. At the end of the study, according to the observed results, some suggestions were proposed and not applied in order to result in the solution of the problems of various aspects of the storm drainage system that are faced in Estrada do Pimenta.