Evaluación del desempeño del modelo hidrológico HBV - light en una microcuenca de páramo

Abstract

Hydrological modeling is a useful tool to understand processes that make up the hydrological cycle of a basin. Nowadays, several hydrological models have been applied in different ecosystems around the world. There are not enough applications in our Andean ecosystems that can be used as a basis for future studies. HBV – light (Hydrologiska Byråns Vattenbalansavdelning) is a semi-distributed or aggregate, conceptual and continuous model, which was developed and tested in several countries with mountainous areas. However, there are not published studies using HBV - light in Andean regions. In the present thesis, it is proposed to carry out the calibration, validation and analyze about the performance of the HBV - light model in a páramo basin. They were used precipitation, air temperature, discharge, transfer evapotranspiration and spatial information from the Zhurucay Ecohydrological Observatory. Eight different structures of the model were analyzed. Self - calibration was used to optimizing the models for Nash – Sutcliffe test (standard model version), Nash Sutcliffe (Nash - ln) logarithms (standard model version) and Relative Bias (Bias). The results showed us that semi - distributed HBV - light is better adapted to the study area. The results for each optimization were: Nash – Sutcliffe, the Standard Model (Basic Version); Nash – In, the Standard Model (Basic Version) and Bias, the Standard Model (UZL Version, K0 in the SUZ box). In conclusion, standard model is the most adaptable structure to the basin. The study indicated that the HBV - light model is applicable to páramo ecosystems because the conditions of adaptability of structures towards the basin of interest.