Coeficientes de correção de vazão no abastecimento urbano: estudo de caso no bairro Cabo Branco, João Pessoa/PB

Abstract

The variability of water consumption in supply systems, directly influenced by intrinsic characteristics of the localities in which they are inserted, is a crucial factor for the proper sizing of distribution infrastructure. In this context, the system must be capable of meeting critical water demand scenarios, for which correction factors are defined to adjust demand projections to the identified consumption peaks. This study aimed to calculate and evaluate the maximum flow rate coefficients K1, K2, and K for the water supply system of the Cabo Branco neighborhood, in João Pessoa (PB), in order to support the sustainable and efficient management of the main supply network. The coefficients were determined based on the calculation method described in ABNT NBR 12211:1992, using flow data recorded between February 6, 2024 (00:00), and February 5, 2025 (23:59), provided by the Water and Sewerage Company of Paraíba (CAGEPA). The Cabo Branco neighborhood was selected for the development of this research due to the availability of consumption data and its importance in the context of municipal water management, being one of the main tourist areas of the city. Additionally, an adaptation of the normative methodology was applied to determine a more representative K coefficient. The values obtained for the coefficients (K1 = 1.227; K2 = 1.205; K = 1.478) showed good agreement with the parameters recommended by ABNT NBR 12218:2017; moreover, the adapted K factor (K = 1.479) presented a value similar to the normative one. However, despite the proximity between the K values found, the proposed methodology demonstrated that the maximum value of the coefficient is not necessarily associated with the day of highest consumption, highlighting the need for a careful analysis of this parameter’s definition in systems with different supply conditions.