Modeling of Continuous Daily Runoff of Karoon River using SMA Loss Function

In this study, HEC-HMS with its continuous loss function module (SMA: Soil Moisture Account) has been applied for the daily runoff modeling in the Pol-e-Shaloo hydrometric station on Karoon river. The daily runoff data from Iranian water year of 1370-1371 to 1374-1375 (1991.Sep.24 to 1996. Sep.23) were utilized as calibration data and the model verification has been performed using the daily data from 1375-1376 to 1377-1378 (1996.Sep.24 to 1999. Sep.23). Model verification exhibited appropriate consistency between the observation and simulation data (R2=0.82). The percent of total volume error (PTVE) values, Nash-Sutcliffe coefficient, and root mean square error (RMSE) of developed model were 11.3 %, 0.82 and 151 cms, respectively. Comparison between the results of this study and other similar studies demonstrated the ability of HEC-HMS with SMA module for the continuous modeling of daily runoff in the Karoon basin.