Modelling Urban Drainage in Taquari – Federal District in Brazil

Taquari is a recent neighbourhood in Brasília, Federal District in Brazil, that started be occupied in 2002, with prevision more three phases to total occupation, however many impacts can be caused in water body receptor because the changes in land use. Therefore, this study investigated these variations in hydrology parameters, such as peak flow, with the objective of analysing in other to avoid possibilities impacts in Paranoá Lake, the new reservoir to water supply in the city. It was been used the PCSWMM software to analyse the differences before the urban system network implementation and after it. The results showed that the peak flow increased more than 300% mainly because all the discharged were concentred in two principal outfalls while, in the natural scenario were more distributed with more than 40 outfalls. It was possible to conclude that the new projects have to be design to natural scenario about hydrologic parameter because of several impacts in runoff volume, water quality and erosion process caused to hydric resources. This objective can be achieve though using LIDs, storing the excess runoff in the lot itself.