Rediseño y optimización del sistema de abastecimiento de agua potable por bombeo, mediante modelación hidráulica, para la Junta Administradora de Agua Potable de Teniente Hugo Ortíz del cantón Pastaza, provincia de Pastaza

Abstract

This technical project develops the redesign and optimization of the pumped drinking water supply system for the Teniente Hugo Ortíz Drinking Water Management Board (JAAP), located in the Pastaza canton, Pastaza province, using hydraulic modeling. The parish presents critical deficiencies in the existing system, including recurring mechanical failures of the 3 HP submersible pump, deterioration of the storage tank, intermittent water supply, a complete lack of treatment, and pressures below the minimum regulatory requirements in several sectors of the network. The methodology was structured in three phases. The first phase comprised a diagnostic assessment using RTK and drone topographic surveys, flow measurements over three months, field pressure measurements, and physicochemical and bacteriological analyses, determining that the water source does not comply with NTE INEN 1108 due to the presence of total and fecal coliforms. The second phase established the design parameters for 30 years: current population of 347 inhabitants, future projection of 570 inhabitants using the arithmetic method (r = 2.14%), future allocation of 130 Lt/hab/day, average daily flow of 1.03 Lt/s, maximum daily flow of 1.29 Lt/s and maximum hourly flow of 3.09 Lt/s. Using these values, the intake, gravity-fed conveyance line (Ø 58.2 mm, L = 45 m), pumping line (Ø 57 mm, L = 307 m), drip chlorination system with 70% calcium hypochlorite (0.26 kg/day), and a 60 m³ reinforced concrete circular storage tank (D = 7 m, h = 2.50 m) were designed in accordance with ACI 350-06 and NEC-15. The distribution network was also modeled using hydraulic modeling software. The third phase involved the preparation of the plans. The static and dynamic hydraulic analysis of the distribution network showed that the 107 pipe sections and nodes designed comply with the velocity (0.25–2.5 m/s) and pressure (7–50 mca) criteria established by the CPE INEN 5 standard, identifying points with high pressures in low areas of the route admissible up to 70 mca due to the topography, insufficient pressures at the ends of the branch of the Vía al Tena and negative pressures in the final sector of the Vía al Puyo that require specific interventions.