Evaluation of IHACRES hydrological model for simulation of daily flow (case study Polrood and Shalmanrood rivers)

Due to the lack of information on most stations and economic constraints for collecting observed data. Identification of a suitable hydrological model can help in the management of water resources. The IHACRES model doesnt require complex data for input, so this model is superior to other models. In this research the efficiency of IHACRES model for simulation of daily flow for Polrood and Shalmanrood rivers which is located in a humid area are (Guilan Province) evaluated. According to results, R2 (Coefficient of Determination) are between 0.60 and 0.70 and also low APRE (Average Parameter Relative Error) results for both rivers that for Polrood is (APRE= 0.367) and for Shalmanrood is (APRE= 0.058). The results of the evaluation showed that the IHACRES model has low deflection for simulation of daily flow amounts and has good ability for simulation of flow in humid area that has high flow. The efficiency of IHACRES model in predicting daily flow was found to be fairly good.