The Igarapé do Gigante macro-basin: planning unit for the management of the Tarumã Basin

Abstract

The Igarapé do Gigante macro-basin in the southwestern region of Manaus AM Brazil is the main tributary of the Tarumã macro-basin of mixed hydrography. In fact, a section lies within the urban limits and another in the rural area. Although such qualities may provide ideal conditions for a better life quality to local communities, the basin has been neglected and significant environmental changes throughout the watercourse have been detected. Current research analyzes the Igarapé do Gigante micro-basin as a planning unit for the management of the Tarumã basin. Investigation comprises a revision of the literature on the water resources in contemporary society with an analysis of the legislation involved and their relationship with models of existing management. The Igarapé do Gigante micro-basin with its social, economical and environmental peculiarities is thus studied. Changes in the micro-basin’s water quality, in the use and irregular occupation of the soil, in sanitary infrastructure and in forest remnants have been identified. The environmental diagnosis of the Iguarapé do Gigante micro-basin has an important role in the elaboration of management and contributes towards efficient public policies for water resources.