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In half century, an unbridled process of urbanization converted a rural population into a concentrated mass mainly located in the cities of Brazil. The process is characterized by the lack of planning, allowing the occupation of fragile/inadequate areas, not taking into consideration the necessities for infrastructure, such as providing the new homes road access, nor connection to the public sewage system. Until today, many cities use rivers to transport their sewage, worsening the environmental quality and capacity for water flow. The difficulties to confront these and other many challenges are even harder due to the diversities of competencies involved in the solutions. The management of water resources is one example of the necessity to integrate many systems: a drainage plan can work as an integrating element while dealing with aspects of sanitation, waste, land use, and macro-drainage. Behind this aspect, this study presents the development of the planning for macro-drainage based on the case study of the Basin of Trapiche River, located in the Brazilian city of Itaguai, using simple models, which are low cost and more accessible, for example, for small budget town halls. It was emphasized the use of non-structural, sustainable steps as means to support the management, increasing the capacity of infiltration and damping of the basin. The objective is to minimize the impacts of flood peaks, the frequent floods, and the risk of claims in Downtown basin, where the main administrative and commercial activities of the city are located.

Gestão de recursos hídricos sob a ótica do planejamento da drenagem urbana e do uso do solo: o caso da Bacia do Rio Trapiche, Itaguaí/RJ