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A presente pesquisa objetivou verificar as taxas de impermeabilizacao e tempo de concentracao das sub-bacias presentes na area urbana de Barra do Garcas – MT, Pontal do Araguaia – MT e Aragarcas – GO. Tais variaveis podem auxiliar no ordenamento territorial da expansao urbana, bem como no planejamento urbano dessas cidades. Os resultados demonstraram que nas areas ja urbanizadas, o grau de impermeabilizacao e tempo de concentracao das sub-bacias apresentaram  niveis considerados “medios e altos”, o que e preocupante, devido a relacao dessas variareis ao crescimento das vazoes e volume escoado, e, consequentemente, aumento da frequencia de inundacoes. Medidas nao-estruturais, como legislacao de uso do solo, com regras e incentivo para aumento de areas permeaveis em lotes, bem como implantacao de solucoes alternativas de drenagem urbana que promovam o retardamento das aguas pluviais, sao solucoes que podem ser implementadas na area em estudo. Analysis of the waterproofing rate and time of concentration in urban sub-basins of Barra do Garcas – MT, Pontal do Araguaia – MT e Aragarcas – GO Abstract : This study aimed to verify the waterproofing rates and time of concentration of these sub-basins present in the urban area of Barra do Garcas – MT, Pontal do Araguaia – MT e Aragarcas – GO. Such variables can assist in land use of urban expansion and the urban planning of these cities. The results demonstrated that in urban areas already, the degree of waterproofing and time of concentration of the sub-basins presented levels considered "medium and high", which is worrying, because the relationship of these variables to the growth of flows and runoff, and, consequently, increased frequency of floods. Non-structural measures such as land use legislation, with rules and incentive to increase permeable areas on lots, and implementation of alternative solutions to urban drainage that promote the slowing of rainwater, are solutions that can be implemented in the study area.

revista verde de agroecologia e desenvolvimento sustentável

Análise da taxa de impermeabilização e tempo de concentração nas sub-bacias da área urbana de Barra do Garças – MT, Pontal do Araguaia – MT e Aragarças – GO