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River discharge prediction is a critical subject in water resource engineering concerns. The HEC-HMS model has been
successfully used in discharge forecasting problems. In this research HEC-HMS model was applied for forecast daily
discharge for M.H. Halli gauge Station which lies in Karnataka state region in India. In order to calibration and
validation of the models, the recorded daily rainfall, temperature and discharge which available for fifteen years (2003–
2017) was divided into two sets. The model’s performance was evaluated by using the root means square error
(RMSE), mean absolute error (MAE), and coefficient of determination (R2). The current study's findings supported the
proposed methodology's applicability for precise discharge modeling.