Escenarios hidrológicos en la cuenca del río Guayllabamba: Modelación de crecidas

Abstract

The purpose of this project is to identify critical flood scenarios in the Guayllabamba river basin and model their behavior through relationships precipitation - runoff. Guayllabamba river basin has been divided in 7 subbasins, each of which has its discharge point into a hydrological station. Physical and geographical features are analyzed. With the hydrological information gathered from the period 1970-2010, the events that correspond to significant flooding and continuous data exist for at least four days are selected. Eight critical events were established for which three scenarios were defined for each relating to the ground cover. With hydrometeorological data and using convolution equations, unit hydrograph of each subbasin for all events, which serve as adjustment parameter calibration in the HEC-HMS software is calculated. Hydrographs resulting in the modeling are compared with those observed hydrographs, and also serve as input parameter in HEC-RAS for hydraulic modeling. The results of this modeling are used for flood maps in zone.