Diretrizes ao planejamento urbano da bacia do córrego Suçuapara (Palmas-TO) com base em sua resposta hidrológico-hidráulica à diferentes cenários de ocupação

Abstract

The population growth of the last decades, increasingly concentrated in the urban environment, has pressed the cities to combine the absorption of this contingent to living together and protect its natural resources. The city of Palmas does not escape this scenario, although it has the peculiar characteristic of owning urbanistic master plans from its conception. In this sense, this study sought to offer guidelines for municipal urban planning, based on the hydrological-hydraulic response to different scenarios of land use and occupation of the Córrego Suçuapra catchment. This catchment is located in the central region of the city, with high potential for increasing its impervious area, and begins to show events of overflow in one of its hydraulic structures. The response of the catchment to the modeled scenarios was analyzed with the aid of a SWMM software model. In addition, the use of swales, infiltration trenches and infiltration wells was evaluated. The results indicated that the overflow of the hydraulic structure comes from the insufficiency of its capacity in front of the insertion of new drainage networks upstream, although its expansion does not compromise the downstream sections. The other stretches of the drainage network, including the main river, are fully capable of convey the discharge, even in the scenarios with greater impervious areas on the catchment. It was also observed that, even with the use of all the constructive potential of the catchment, maintaining the current inhabitants/m² rate, the densities reached are lower than those recommended by the municipal urban plans. In order to enhance its occupation without major impacts to the drainage system of the catchment, it was recommended the possible increase in the constructive potential granted by the Outorga Onerosa do Direito de Construir, the design of an Operação Urbana Consorciada for the complete implementation of the Parque Linear dos Povos Indígenas, adjacent to the Córrego Suçuapara catchment, and the possible alteration of the land use of some green areas of the blocks.