Author(s): P. Alfredini; E. Arasaki; J. C. M. Bernardino
Linked Author(s):
Keywords: Hybrid model; Santos bay; Plume monitoring; Sea outfall; Waste dispersion
Abstract: The ocean disposal of domestic sewage via sea outfall must be carefully studied, such as previous modeling of waste-plume dispersion processes for environmental impact assessments. A scale model, reproducing the Santos Bay and Estuary was hydrodynamic calibrated at the Hydraulic Laboratory of Polytechnic School, University of São Paulo, Brazil. The complete modeling of this large estuarine system used numerical and scale models, which are all related to each other. Such an overall model composed of individual hydraulic and numerical components is called a hybrid or composite model. It combines the advantages of both model components, and adequate field surveys measurements, being particularly important for simulating the plume dispersion process in Santos Bay. The goal hereby is to present a performance-comparison of the outfall plume dispersion. The study suggested preliminary numerical simulations in the near-field mixing processes, with the purpose to define the boundary condition in the beginning of the far-field. In addition, numerical simulations in the far-field are required to reproduce the wind-effect, with the purpose of the scale model air-tunnel hydro-aerodynamics calibration. Scale model runs for dispersion, using an advanced methodology for dye plume monitoring, was calibrated with a numerical model of plume dispersion and validated with the comparison with treated satellite images of the plume.
Year: 2016