Estudio en Modelo Físico para la Evaluación del Desarrollo y de la Disipación de Energía en Flujo Rasante sobre una Rápida de Fondo Escalonado – Caso de la Descarga del Colector Iñaquito en la Quebrada El Batán

Abstract

The aim of this project is to evaluate the dissipation of energy in skimming flow on stepped spillways. It is designed and implemented by EPMAPS in the extension of Iñaquito collector on the Batán ravine. The analysis is presented making a physical model on a scale of 1:20. The experimental research of skimming flow is developed in a prismatic rectangular channel of width 50cm and length 6.40 m with a slope of 45°. The channel has 87 acrylic steps height and length 5cm also acrylic sidewalls for flow visualization. The obtained results made possible identify designing criteria and obtain experimental curves of easy application that define the geometric characteristics of the stepped spillways. It is concluded that skimming flow regimens were obtained during the tests for the discharge range [11-150 m3/s]. The efficiency of dissipation of energy exceeds 85% for the discharge range tested. The maximum efficient operation discharge of the entire is 42 m3/s; about 30% of the design discharge. With the suggested modifications the operation of the structure reaches a safe discharge and an efficient operation of 100 m3/s; thus, the efficiency of the structure was increased by 40%.