Restoration of Lake Pampulha, Brazil by using sanitation and in-lake techniques

The paper presents a broad view about the measures for restoration of Lake Pampulha, Brazil. This man made reservoir is located in a dense inhabited urban area and constitutes the main touristic attraction of the city of Belo Horizonte. Since several decades the water body receives the discharge of untreated sewage from domestic as well from industrial sources, what leads to severe episodes of algal blooms in the water surface. In order to combat this eutrophication problem some measures have been already carried out and others are planned in a short term. These preventive and corrective techniques provides an efficient association between sanitation processes and the application of in-lake treatment actions. Moreover a hydrodynamic modelling has been also carried out with the purpose of evaluating the water circulation and the water residence time in the compartments of the lake.