Estudo comparativo dos métodos de dimensionamento de reservatório ótimo em aproveitamento de águas pluviais

Abstract

Rain scarcity, crisis in water supply, mandatory rationing and a flow reduction of the rivers led the Belo Horizonte City Council to present the Bill nº 1.381/2014, which establishes the Municipal Policy for the Collection, Storage and Utilization of Rainwater and determine general rules for its promotion. In the same perspective, Bill nº 1.165/2014 proposes that new buildings with a consumption over 20.000m³ per day be are required to adopt measures to reuse water. The goal of these policies is to promote the conservation and rational use of water, environmental quality, suitable and increasing management of the Rainwater volume, besides stimulating the direct and planned reuse of these waters. However, it does not regulate or establish norms for calculating the size of the reservoirs. The water crisis that the country faces demands objective measures that promote the preservation of water, but in addition, it needs proposals that avoid wasteful and expensive costs for users, encouraging the population to adapt their homes to this new reality. The purpose of this work is to do an analysis of the sizing methods for reservoirs used in the rainwater use presented in the ABNT NBR 15.527 and, from this reflection, to elaborate a cost/benefit study that leads to an Optimum Reservoir project.