Evaluación de la herramienta de simulación del recurso hídrico Hydro-BID para la cuantificación de la disponibilidad de agua en la cuenca alta del río Guayllabamba y unidades hídricas aportantes de agua para el Distrito Metropolitano de Quito

Abstract

The Inter-American Development Bank (IDB) developed the Regional Water Resources Simulation Model for Latin America and the Caribbean known as Hydro-BID. This study evaluate the efficiency of Hydro-BID to predict and simulate the availability of water on the 14 basins managed by Quito´s Public Metropolitan Drinking Water and Sanitation Company (EPMAPS), and the Fund for Water Protection (FONAG). Hydro-BID applies the Generalized Watershed Loading Functions - (GWLF) model with a new lag-routing methodology developed by RTI. The base information includes data from 102 weather and rainfall stations available in the basin with daily temporal resolution from 2001 to 2017. The model outputs are presented as daily time series plots of water flow projections. Water availability in the area could be from 227 mm/year in western basins such as Pisque to 1212 mm/year in eastern basins such as Chalpi Grande. Finally, HydroBID generated acceptable results in the simulation. However, this tool has some limitations like complete series of precipitation and temperature as an input, the soil data in the program may not represent the current soil conditions of the study area and the calibration is manual.