اصلاح روش IUDRN به منظور شبيه سازي استوكاستيكي دبي سالانه رودخانه ها: مطالعه موردي : رودخانه اريه استان خراسان رضوي

Modified IUDRN as a Tool for Annual Streamflow Stochastic Simulation (Case Study: Arieh River- Khorassan)

In this study, the Independent Uniformly Distributed Random Numbers (IUDRN) method as a hydrolog-ic synthetic data generation technique has been modified to simulate the streamflow in annual time scale. A hybrid approach based on hydrological conditions-random number combination has been developed and proposed. The three hydrologic conditions as wet, normal and dry conditions have been defined in one third of each of random number that varies from 0 to 1. The annual mean values of 52 years discharge of Arieh River situated in North of Neyshaboor in Khorassan province of Iran has been applied for validation of proposed approach. The comparison between the results of two methods (IUDRN and proposed method) shows that the error estimation has been reduced from 25% to 17%. This result indicates that new approach (MIUDRN) can be applied to simulate the streamflow data with a high efficiency.