Ajuste y Validación del Modelo Precipitación - Escorrentía GR2M Aplicado a la Subcuenca Nevado

Abstract

This article presents the GR2M precipitation adjustment and validation - runoff model in the ―Nevado‖ sub - basin. The river's canal borns in the ―Nevado Del Cocuy‖ and ends in the ―Chicamocha‖ river, it crosses eight municipalities of ―Boyacá‖ and ―Santander‖ departments. This model estimates flows with few monthly input data like precipitation and evapotranspiration. The data were obtained from five representative climatological stations in the ―Nevado‖ sub-basin, ensuring that the model is reliable in the representation of the hydrological basin in this If the estimation of the flow is made through the qualitative and quantitative evaluation, it'll determining optimal values of an objective function by means of an optimization technique to compare the observed values of flows with the values calculated through the model among the graphs to analyze the hydrological risks that can happen in different times of the year according with the hydrological variations. The data obtained from the limnimetric station referenced as drainage point are compared with the data obtained with the simulation in the EvalHid software. Both, the data of the ordinary climatological stations and those of the limnimetric station were supplied by the ―Instituto de Hidrología, Meteorología y Estudios Ambientales de Colombia‖ (IDEAM).