An Analysis of Total Phosphorus Dispersion in Lake Used As a Municipal Water Supply

Anais da Academia Brasileira de Ciências

RÔmulo C. Lima¹  AndrÉ L.a. Mesquita¹  Claudio J.c. Blanco¹  Maria De Lourdes S. Santos¹  Yves Secretan¹ 

关键词: Phosphorus dispersion;    advection-diffusion-reaction equation;    θ/SUPG-method;    finite elements;    Dispersão do fósforo;    equação de advecção-difusão-reação;    método θ /SUPG;    elementos finitos;   

DOI  :  10.1590/0001-3765201520130317

来源: SciELO

【 摘 要 】

ABSTRACTIn Belém city is located the potable water supply system of its metropolitan area, which includes, in addition to this city, four more municipalities. In this water supply complex is the Água Preta lake, which serves as a reservoir for the water pumped from the Guamá river. Due to the great importance of this lake for this system, several works have been devoted to its study, from the monitoring of the quality of its waters to its hydrodynamic modeling. This paper presents the results obtained by computer simulation of the phosphorus dispersion within this reservoir by the numerical solution of two-dimensional equation of advection-diffusion-reaction by the method θ/SUPG. Comparing these results with data concentration of total phosphorus collected from November 2008 to October 2009 and from satellite photos show that the biggest polluters of the water of this lake are the domestic sewage dumps from the population living in its vicinity. The results obtained indicate the need for more information for more precise quantitative analysis. However, they show that the phosphorus brought by the Guamá river water is consumed in an area adjacent to the canal that carries this water into the lake. Phosphorus deposits in the lake bottom should be monitored to verify their behavior, thus preventing the quality of water maintained therein.

【 授权许可】

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