Estudio hidrológico e hidráulico para un puente, en el sitio la Mocorita, cantón Portoviejo, provincia de Manabi

Abstract

Abstract: This degree project consisted of the development of a hydrological and hydraulic study for the design of a bridge over the Mancha Grande River, located in La Mocorita, Portoviejo Canton, Manabí Province. The research was based on the analysis of the watershed’s morphometric parameters and the estimation of peak flood discharges for return periods of 25, 50, and 100 years, using HEC-HMS software and GIS tools. The Manning formula was applied to validate the hydraulic results, determining a maximum water surface elevation of +117.88 meters above sea level and a design discharge of 255.50 m³/s for the 100-year return period. General scour was estimated at 2.34 m using the Lischtvan–Levediev theory, and a backwater rise of only 0.02 m was identified, which allowed for an optimal bridge span of 26.00 m. Finally, a hydraulic clearance of 2.50 m was established, ensuring structural safety against extreme events.