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Hydrodynamic modeling of the Utinga source in Belém, Pará, Brazil.

de Araújo, Thaís Fonseca, Blanco, Claudio José Cavalcante, da Silva Alves, Cleidson, Da Silva Holanda, Patrícia et Secretan, Yves (2021). Hydrodynamic modeling of the Utinga source in Belém, Pará, Brazil. Modeling Earth Systems and Environment , vol. 7 , nº 1. p. 317-329. DOI: 10.1007/s40808-020-01011-5.

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Résumé

Current paper contributes towards a hydrodynamic modeling of the main drinking water source of Belém, the capital of the state of Pará, Brazil. Belém is one of the largest cities in the Brazilian Amazon region, with a population of approximately 1,500,000 inhabitants. The Utinga water source is formed by lakes Água Preta and Bologna connected by a canal. The literature presents the separate modeling of the lakes, without considering the canal, highlighting the motive of current research. Topography data were collected in the feld to supplement data on the lakes and the canal data, provided by the local Sanitation and Water Supply Company (COSANPA) and by the Development and Administration Company of the Metropolitan Area of Belém (CODEM). The Saint–Venant 2D model vertically integrated had its equations discretized by the fnite element method and applied to simulate velocities and depths of the lakes and the canal. The mesh generated is formed by six-node triangles (T6L). Mesh stores data on topography, substrate and boundary conditions. Resulting model revealed that the simulated depths and velocities corroborate those available in the literature, except in some cases when simulated velocities were slightly higher. In the case of the interconnecting canal, it is the frst time that velocities and depths are simulated and analyzed. Simulated velocities and depths are input data for dispersion models of pollutants and sediment transport. Models must be developed to provide support for the management of water resources that supply most of the city. The above is important since irregular residences discharge untreated sewage into the Utinga source, favoring the proliferation of macrophytes in the lakes Bolonha and Água Preta. Untreated sewage discharge also increases water treatment costs.

Type de document: Article
Mots-clés libres: artifcial lakes; untreated sewage; pollution of water sources; Amazon region
Centre: Centre Eau Terre Environnement
Date de dépôt: 09 juin 2021 15:30
Dernière modification: 09 juin 2021 15:30
URI: https://espace.inrs.ca/id/eprint/11470

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