DIMENSIONAMENTO E ESTIMATIVA ORÇAMENTÁRIA DE MICRORRESERVATÓRIOS DE DETENÇÃO EM DIFERENTES LOTES NA CIDADE DE JOÃO PESSOA – PB

Abstract

Urban sprawl has been causing urban drainage, which directly affects society. Modification of land use through waterproofing is the most aggravating factor of these problems. The traditional drainage system, which only proposes to downstream the volume of surplus water, becomes obsolete. Compensatory techniques are needed to attempt to rebalance the natural hydrological cycle that has been altered with urbanization. In this context, the concept of low impact development, LID, arises, where integrated measures are proposed for a greater conformity of the basin with its hydrological cycle before urbanization. In this work, the design of detention microreservatories for damping the runoff in batches in the city of João Pessoa, Paraíba, was carried out, considering variations in occupancy rate, rainfall return time and maximum output flow. The dynamic model SWMM (Storm Water Management Model) was used for the design, which is based on the Puls method for storage simulation and reservoir flow. A budget estimate was also made to obtain a cost forecast with the implantation of micro-reservoirs. For this estimate were used the services of the National System of Indexes and Costs Survey of Civil Construction - SINAPI. The results showed that the microreservatories sized for the catchment areas under study, with a 100% posturbanization flow, did not exceed 1.49% of the total cost of the construction of a single-family dwelling.