HYDROLOGICAL-HYDRODYNAMIC MODEL OF THE TAMANDARÉ CANAL IN BELÉM-PA FOR THE IMPLEMENTATION OF WORKS PRIOR TO COP 30

Abstract

The implementation of the Tamandaré Linear Park in Belém-PA, in the Amazon, to improve urban infrastructure before COP30 (30th UN Conference of the Parties on Climate Change), was based on a hydrological-hydrodynamic study developed using the free computational code Storm Water Management Model (SWMM), to formulate and propose measures to combat and prevent overflows of the Tamandaré Channel, resulting from intense precipitation events and high tides, acting on highly impermeable terrain with low altimetric elevations (from 0 to 6 m). The hydraulic behavior of the basin was realistically simulated considering a rainfall event with a 50-year return period (172 mm of precipitation in 24 hours), associated with the maximum high tide condition (3.02 m). The results highlighted the susceptibility to flooding in areas with elevations below 3.02 m due to tidal influence and indicated the importance of using floodgates for hydraulic control. It was found that the occupancy of the Tamandaré Channel's capacity reached 97%, recommending the use of electric booster pumps as a preventive measure against overflows. The installation of two electric pumps was indicated, each with a flow rate of 1.0 m³/s and a manometric head of 7.2 m, automatically activated when the canal occupancy reaches 85% and deactivated when it reaches 60%. Thus, the computer simulation with SWMM enabled the formulation of engineering solutions for a problem of great relevance in combating and preventing flooding in the city of Belém-PA.