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This paper proposes setting a specific discharge for restriction (maximum value an area can generate after occupation, per unit area) in an urban catchment based on the maximum capacity of its main drainage channel and the current land use scenario, supported by hydrologic-hydrodynamics modeling. For this purpose, several field tasks were performed and SWMM software was used to simulate scenarios defined in terms of recurrence periods and downstream level in the channel outfall. The catchment, one of the most important tributaries of the Reginaldo River in Maceió City, covers a 2.1 km2 area. The results confirm the premise and agree with previous studies. Assuming, for example, that it is reasonable that the rational method provides a good estimate of pre-urbanization discharge for TR=10 years and duration of 1 h, the values of the specific discharge for restriction through maximum capacity of the main drainage channel can double or even triple the values of the pre-urban scenario.

Análise de critérios para a determinação da vazão de restrição ao escoamento superficial urbano