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RESUMEN: A pesar de su importancia, la hidrologia de las cuencas de los Andes se conoce pobremente. Por ello, ante la creciente demanda de la sociedad por una explotacion sostenible de los recursos hidricos y la conservacion de cuencas altoandinas del Austro Ecuatoriano, es necesario emprender iniciativas de investigacion para conocer, entre otros aspectos, las interrelaciones entre el clima y la hidrologia de paramos y su capacidad de produccion de agua. En este contexto, el presente articulo describe las experiencias de modelacion hidrologica de una microcuenca altoandina ubicada al sur oeste de Cuenca (Ecuador), presentando el detalle del desarrollo del modelo en base a un codigo conceptual, agregado (NAM), asi como algunos resultados preliminares de la modelacion. El protocolo de modelacion incluyo una aproximacion determinista/estocastica en base a simulaciones Monte Carlo. Los resultados de la modelacion son halagadores, lo cual alienta una revision de la version actual del modelo, incluyendo en el mismo la nueva informacion que se recabe en un futuro proximo, asi como la aplicacion del codigo hidrologico a otras subcuencas y cuencas altoandinas de interes. Palabras clave: Paramo, region Andina, modelacion numerica, incertidumbre, analisis de sensibilidad, simulaciones Monte Carlo, GLUE ABSTRACT: Despite its importance, the hydrology of the Andean catchments is at the moment not well known. Hence, facing the continuously growing concern from society for a sustainable use of water resources and the conservation of mountain catchments of the Ecuadorian Austral region, it is relevant to start with research initiatives for getting to know, among other aspects, the interrelationships between climate and hydrology of paramos and the capacity of these ecosystems to “produce” water. In this context, the current manuscript describes some of the experiences modelling the hydrology of a micro-catchment located to the south-west of Cuenca (Ecuador), presenting some details of the model construction for the study site on the basis of a lumped conceptual code (NAM), as well as, some preliminary modelling results. The modelling protocol included a deterministic/stochastic approach based on Monte Carlo simulations. The initial modelling results are acceptable, which encourages the further improvement of the current version of the model, as well as, the further use of the numerical code on additional study sites such as Andean sub-catchments and catchments of interest. Keywords: Paramo, Andean region, numerical modelling, uncertainty, sensibility analysis, Monte Carlo simulations, GLUE

Modelación hidrológica de una microcuenca Altoandina ubicada en el Austro Ecuatoriano