Escolha de alternativas para economia de água em edificações residenciais de Brasília, DF

Conservação de água

Abstract

Population growth, the indiscriminate use of water and the pollution of some water sources have led to water supply crises. This is the case of Brasilia, for which this work analyzed the use of water conservation methods in residential buildings. In this analysis, a standard property was selected and the different combinations of possible alternatives were studied. Due to the large number of alternatives, a screening process was carried out to obtain a smaller set of viable alternatives. The alternatives of water conservation in residential buildings that remained in the analysis were as follows: reuse of segregated gray water, economizers, use of rainwater and individual measurement. The criteria for measuring the performance of these alternatives were defined based on consultation with several specialists. The selected alternatives then had their performances in each calculated criterion, forming an array of consequences. To this matrix, the multicriteria and multiobjective methods TOPSIS and ELECTRE III III were applied to hierarchize these alternatives. The result of the execution of these methods showed that the use of water saving equipment occupied the first place in the ranking of the alternatives of water conservation in residential buildings, for the case studied in Brasilia.