Evaluating performance of MIKE 11 NAM model for runoff modeling on upper basin of Orontes River in Syria

This study aims to evaluate the performance of MIKE 11 NAM model for runoff modeling in case lack data as a on upper basin Orontes River Syria. In this study, was relied one most important hydrological analysis and models. At first, used processed, gaps time series were filled; then, entered into model, trial-and-error method adopt parameters that give best results. By comparing results with measured real values flow, it found there are large errors unreliability which is due available data, consistent other studies conducted similar cases using same model. Therefore, recommends expanding possibility Mike's models modeling, especially because great importance preparation studies, water balance sustainable development resources studied area.