Document Type : Original Article

Authors

• Kambiz Mohammadie ¹
• Hossien Khozeymehnezhad ¹
• Mahdi Amirabadizadeh ²

¹ Department, of Water Engineering Faculty of Agriculture, University of Birjand, Birjand.Iran.

² Faculty member, Water Engineering Department, Faculty of Agriculture, University of Birjand

Abstract

Rainfall-runoff modeling is one of the key tools in hydrology to determine flood characteristics such as the amount and time of peak discharge.The IHACRES model parameters were calibrated using the objective function to maximize the Nash-Sutcliffe index. The simulation values of peak flow rate and peak flow time were calibrated and validated using the Ns and R2 evaluation criteria. In the ARMAX method, it was 0.79 and 0.85, which indicates the acceptable performance of simulating peak discharge values and the time to reach peak discharge in the ARMAX method. In the validation stage, the values of the evaluation criteria in the ARMAX method were estimated to be 0.54 and 0.64, respectively, which indicates that the ARMAX method has a desirable performance. Overall, the research results indicate that the results obtained from the IHACRES model in the study area, using the ARMAX method, have had an accurate performance.

Keywords

• Keywords: Precipitation-runoff simulation
• IHACRES model
• calibration
• Afin watershed

Main Subjects

• ًQanat and aquifer