Modelación hidrológica del río Chaguana para la generación de mapas de inundación en la parroquia Tendales provincia de El Oro

Abstract

The main purpose of this research project is to develop flood maps and assess the flood risk factors associated with the Tendales parish, which is part of the El Guabo Canton in the province of El Oro. To achieve this, maximum flow rates were calculated for different return periods 2, 5, 10, 25, 50, and 100 years, using the rational method. Additionally, the watershed was characterized using ArcGIS software to obtain the weighted runoff coefficient and precipitation intensities through Intensity-Duration-Frequency (IDF) curves. The results revealed flow rates of 134.38, 175.05, 212.38, 278.70, 342.87, and 424.94 m3/s for the different return periods. To model the geometry of the Chaguana river basin, HEC-GeoRAS software, an extension of the ArcGIS program, was employed. Subsequently, flood simulations were conducted using HEC-RAS software, which allowed for the determination of flood levels corresponding to the mentioned return periods: 2.03, 2.17, 2.26, 2.42, 2.55, and 2.70 meters.