RESUMOCom o crescimento da população e o consequente aumento da urbanização, o lançamento de resíduos sólidos nos sistemas de drenagem urbana tem aumentado nos últimos anos, principalmente nas regiões periféricas das cidades.Este estudo teve como objetivo qualificar e quantificar os resíduos sólidos no arroio Cancela-Tamandai, localizado em área urbana, no município de Santa Maria (RS). ABSTRACTWith population growth, and the resulting increase in urbanization, the disposal of solid waste in the urban drainage system has increased in recent years, especially in the outskirts of the cities. This study aimed to qualify and quantify the solid waste in Cancela-Tamandai's stream, located in an urban area, in the municipality of Santa Maria (RS).Were collected in total 1.153.2 kg of solid waste with a rainfall total for the period of 518.94 mm, 93.9% of these being composed of organic matter with the majority of vegetation debrid. CancelaTamandai's watershed presented a load of solid waste equal to 17.27 or 0.424 kg.inhab -1 .year -1 . The prediction curve of drained solid waste due to the rainfall correlated 76.4%, important parameter for decision making of municipal managers in relation to solid waste generated.Thus, devise strategies for monitoring these residues represents an important step in finding solutions aimed at better management of urban watersheds.Keywords: drained solid waste; waste quantification; urban watershed; rainfall correlation x solid waste. A bacia hidrográfica do arroio Cancela, localizada próxima à Rua Tamandai, assim denominado Arroio Cancela-Tamandai, é de grande INTRODUÇÃO