ABSTRACT: Large part of volume of water that reaches the river and drainage systems comes from runoff due to the waterproofing process of urban space and paving the riverbeds and streams. The management of cities should take into account the sustainability and for this, the indicators are important tools to aid decision making, use and land occupation, and thus avoid risk situations related to urban water. For selection of appropriate indicators was used multicriteria methods, based on the principles of sustainability and more sustainable urban drainage processes, such as urban low impact development. These indicators were used for the scenario development, through specific tool for monitoring and decision making of managers and responsible for the management of stormwater. This is the purpose of the design of the Support System for the Sustainable Management of Stormwater – SAMSAP, it is to generate a monitoring tool and decision support. With the use of software can be further expanded the scope of the models to include more variables and test alternatives, can simplify complex phenomena by eliminating everything that can be foreign to what needs to be studied. This tool will be applied experimentally in São Carlos / SP, because it is a city in which problems related to the management of rain waters are recurrent and have several data sources on the topic.
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