Gestão de recursos hídricos: guia para emissários de lançamento de águas pluviais

Abstract

The installation of cities, and / or urban expansion, results in a series of impacts on the local hydrological cycle, mainly the waterproofing of the soil. The volume of stormwater that drains superficially have an increase that requires structures, planning and actions aimed at minimizing the socio-environmental and economic impacts of defluvium.In many brazilian cities it’s common the model of urban drainage systems through tubes that direct water to receiving water bodies. However, there are other structures that can be installed to minimize the negative impacts of this water discharge. This work aims to discuss the importance of having well planned structures to dissipate stormwater in urban áreas. The methodology used for research was bibliographic and field observation. The results show that among the main related problems we can mention: soil erosion at the discharge points, slope instability, siltation of water bodies. Thus, as a product of the discussion, a guidebook was elaborated, including measures structural and not structural for the mitigating of environmental impacts at the points of stormwater discharge, being called "Guide: Stormwater outfalls". This material presents basic concepts about aspects associated with discharge outfalls, energy dissipating structures, erosive processes, monitoring of emissaries, etc. The material has the potential to advise technicians related to the municipal executive power, as well as managers, property developers and other interested parties, giving support to them with suggestions to minimize socioeconomic and environmental damage related to stormwater outfalls.