Dimensionamento de reservatório de detenção para controle de enchentes em Fortaleza/CE

Abstract

This paper aims to develop a sizing methodology of a detention reservoir for flood control, on lot level, in Fortaleza/CE. A sample área with real potential for urban development was chosen, and inside it was considered the construction of a fictitious enterprise. Then, considering the changes in the watershed parameters due to the waterproofing, it were evaluated peak discharge of pre- and post-development through the rational method, and their respective hydrographs. The pre-development peak discharge obtained was about 2,3 times lower than the postdevelopment peak discharge, evidencing the amortization between the hydrograms. The reservoir volume was calculated assuming the post-development discharge should always be less than the pre-development discharge, resulting in a capacity of reservation numerically equal to the area between the hydrograms. A comparative analysis between the capacity of reservation obtained in Fortaleza and the ones that would be obtained in other brazilian cities, according to their own methodologies, considering the same enterprise, indicated that this methodology had satisfactory results