Streamflow Simulation Using IHACRES Rainfall-Runoff Model (Case Study: Kasilian Catchment)

Streamflow simulation is important as a prerequisite to engineering and environmental problems. In this research, IHACRES rainfall-runoff model was used to simulate streamflow in Kasilian Catchment which located in Mazandaran Province. This model was calibrated and evaluated in this Catchment. The error between simulated and observed streamflow values was estimated using NSE, RMSE and MAE criteria. Also significance test of difference between simulated and observed streamflow values was evaluated using t-test method in the SPSS software. The results of this research showed that the model can simulate monthly and daily data with satisfactory accuracy (0.36 annual data. On the other hand, in comparison between monthly and daily streamflows, it can be seen that simulation of monthly streamflow is more reliable than that of daily streamflow. Difference between simulated and observed streamflow values was not significant for daily, monthly and annual time intervals.