Modelagem hidráulica do sistema de abastecimento de água da cidade de Bananeiras-PB

Abstract

The Act No. 11,445/2007 establishes national guidelines for basic sanitation services and the national sanitation policy. This service is directly responsible for promoting health and increasing productivity by providing the population with minimum conditions of dignity. Among the four main pillars of basic sanitation, water supply is usually the first measure to be implemented to ensure this constitutional right. This study aims to diagnose the existing water supply system in the city of Bananeiras-PB, based on the contributions of different state agencies responsible for implementing, managing, maintaining, and expanding this service for the population. Some of the most valuable players involved in this process are the Companhia de Agua e Esgoto da Paraíba (CAGEPA), the Tribunal de Contas do Estado da Paraiba (TCE-PB), the Instituto Brasileiro de Geografia e Estatistica (IBGE), and the Sistema Nacional de Informações sobre Saneamento (SINISA). These organizations provided the supply water network and unofficial data on demand, water wastage, pumps and water reserve, in addition of topographic elevations data and official information on the local water system. The organization and integration of these features were combinaned using AutoCAD software for drawing tools and Excel software for calculations necessary for assembling and processing the network of water supply values. Based on the collected data, EPANET software was used to process the main obtained and calculated data (internal diameter, topographic elevation, consumption and parameters of the pumps in the network to determine pressures and hydraulic load at the nodes, flow rate, velocity, and energy loss in the sections to compile a dataset as close to reality as possible. Two network scenerios were modeled, the first one using the SINISA website and the second using database provided by CAGEPA. The second scenerio demonstrated results that were more realistic and made it possible to built a more realistic model, while the first one demonstrated a network was less pressure problems and lack of water, which were not very consistente with the reality of the urban city’s network.