Dimensionamento e estimativa orçamentária de diferentes combinações de técnicas compensatórias de drenagem urbana em lote do município de Santa Rita - PB

Abstract

The study consisted in elaborating different combinations of low impact development techniques in urban drainage and and an estimation of the probable budgets for such as well. The study location is situated in the city of Santa Rita. Flooding has been causing many problems lately and been mentioned in different studies as of the most powerful natural disaster causes. This study was based on how the area was occupied after urbanization, so that the impact on urban drainage system in terms of flow rate values was calculated. In this way, the dimensions of the different combinations contemplating the LID techniques were calculated and their cost estimated. These low impact development techniques were of three types: permeable pavement, infiltration trenches and detention reservoirs. SINAPI, a Brazilian system for recommending prices in services of the civil engineering, was used as database for the budget. It is valid to point out that geotechnical information of the site could not be provided and, in this way, the accuracy of the dimensions found for the LID techniques was probably not as good as expected. Yet, the results suggested that the infiltration trenches and the detention reservoirs could be pointed as more interesting alternatives, in an economic perspective