Caracterización experimental y numérica de velocidad superficial de la confluencia del Río Tarqui y Yanuncay aplicando la técnica LSPIV

Abstract

This study focuses on the experimental and numerical characterization of surface velocity at the confluence of the Tarqui and Yanuncay rivers using the LSPIV (Large Scale Particle Image Velocimetry) technique. This technique allows for accurate measurement of watercourse surface velocities by analyzing images taken from the water surface, making it a non-intrusive methodology. Experimental measurements were conducted under low flow conditions, which made it possible to observe areas with high velocities in the main river channels. In contrast, lower velocities were found along the river banks. The results reveal the heterogeneous distribution of surface velocities and the flow complexity in mountain rivers. To adequately represent the surface velocity at the confluence of the Tarqui and Yanuncay rivers, a 2D hydrodynamic model was developed. This model showed a high correlation with the experimental data, validating its reliability. The analysis found average errors of 1.26% in the Tarqui River, 2.75% in the Yanuncay River, and 1.77% at the confluence point. Experimental and numerical techniques, in conjunction with LSPIV, proved to be an effective tool for flow characterization in river confluence zones. Combining these techniques with numerical modeling provides a solid methodology for analyzing and managing complex river systems.