Levantamento do sistema de drenagem urbana da área central do Município de Santo Ângelo (RS)

Abstract

With the rapid urban growth in several cities, the problem of urban flooding, due to the lack of planning, which has affected Brazilian cities, is becoming increasingly evident. Soil sealing, directly associated with urban development, corroborates the phenomenon of flooding, not allowing the absorption of water by the soil and intensifying the surface flow, leaving the cities dependent on structural measures to control rainfall runoff Based on this finding, The present work carried out a study of the urban drainage system of the central area of Santo Ângelo, which made an inventory of the city's wolf mouths and further data analysis, including the elaboration of a database of the collected information. The methodology adopted in the application of the study involved the quantity, quality and spatial distribution of urban drainage elements, pointing out deficiencies for planning actions. Geoprocessing tools were used in the analyzes with the support of geotechnologies to obtain data regarding the dimensions, location and photographic record of the points of interest. It was realized that the structure can be considered insufficient to withstand heavy rainfall in a short period of time, characteristic of the convective rainfall of the region, with several pipes of undersized diameters to supply the runoff, and in some places there are insufficient mouths. lobe, in addition to the presence of obstruction of the flow of the pipes and irregular presence of sewage. Thus, it is suggested to restructure the system at critical points, aiming at avoiding the downstream overloaded flow at points unable to meet the demand.