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Cormix Model Aplication in Time Series for Different Scenarios of Effluent Types and Discharge Configurations

Author(s): Passos G. J. S. ; Bleninger T.

Linked Author(s): Tobias Bleninger

Keywords: Submarine outfalls; Time series; CORMIX; Cor Time.

Abstract: This work will demonstrate the effects that different effluents and discharge configurations have on marine waters. The method uses CORMIX, a hydrodynamic modeling software capable of predicting the geometric characteristics and dilution of the initial mixing zone. The model was run in a time-series mode, representing one month data and changing the ambient and effluent characteristics. This series was simulated by Cor Time, a post-processing submodule of CORMIX, for nine study scenarios. There were three effluent types (treated sewage, cooling water and industrial effluent) discharged by three different discharge configurations (multiport diffusers, submerged single pipe and open channel with free surface) .The best dilution occurred with the multiport diffusers. The other discharges presented dilutions under 100, with lower efficiency, thinner plumes (less than 2. 4 m) ,concentrated on the surface (treated sewage) or on the sea bottom (industrial effluent) .These cases need greater investment in effluent treatment, they cause greater environmental impact, visual aspect concerns on the surface and the ecosystem on the sea bottom. The plume of the onshore channel discharge configuration always reached the coast, thus having the potential of problems related to bathing water quality.

DOI:

Year: 2015

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