Utilização de Indicador geomorfológico para fixação de medidas de controle de cheias em áreas urbanas: estudo de Caso: Brasília-DF

Abstract

In this study were analyzed the increasing the flow surface due to occupation and its impact on urban water course. Through compensatory techniques of urban drainage, sought to avoid or reduce those impacts. This research is therefore to quantify the excess flow due to urbanization and find the area that should remain unoccupied for use of compensatorytechniques. It was conducted a survey of information with hydrological data, characteristics of basins and urban development, and established itself relations of hydrological variables with the elements of urban development in the basin of the stream Bananal which is part of thebasin Paranoá in Brasília, in the brazilian center west region. It was found that the drainage should consider the characteristics of the bodies receptors, the topography and the index of permeability of the natural area. For urban planning, should be available 11% of the total areaoccupied to be used as a detention basin. There was also that the use of permeable pavements and / or micro-reservoirs can help in reducing the flow surface, and therefore the impact on the course of water. This study showed further that the physical characteristics of the natural basin (size, topography, infiltration rate, type of soil) are important to set the necessary zoning to avoid impacts on the bodies of water receptors