Curitiba
The catchment area of Curitiba consists of several rivers and streams that cross the city in different directions, grouped in six river basins. The main rivers that form the watershed of the city are: Atuba River, Belém River, Barigüi River, Passaúna River, Ribeirão dos Padilhas and the Iguaçu River, all with characteristics of dendritic drainage. Since the 1970s, Curitiba has working on alternatives to minimize the negative impacts of urbanization on rivers. An example of this was the construction of parks along the rivers with artificial lakes, which retain the water for longer periods of time, minimizing floods. Currently, after many studies about the local water passages, almost all the rivers are in canalization process. Other alternatives developed to minimize the effects of urbanization are the implementation of the programs for environmental education, inspection and monitoring, elaboration and application of legislation and infrastructure works.