Calibration of a Distributed Hydrological Model (VIC-3L) Based on Global Water Resources Reanalysis Datasets

The lack of observed streamflow datasets for calibration rainfall-runoff models imposes substantial problems their applicability, especially in poorly gauged or ungauged river basins. Developing satellite technologies and increasing computational powers over the past decades, have provided an environment researchers to simulate several water balance components globally using these assimilation techniques. Due importance accurate hydrologic modeling, this study aims investigate applicability global resources reanalysis (GWRR) including surface soil moisture (SSM), evapotranspiration (ET), runoff (SR) macro-scale hydrological model (VIC-3L) SefidRood basin (SRB) Iran at different scenarios. Results show that case SSM datasets, model’s performance simulation hydrograph, with NSE value higher than 0.65, is better other datasets. Among based on LISFLOOD HBV are best ones VIC-3L SRB. In contrast, ET aren’t so reliable area. Furthermore, cases tends overestimation low-flows, while, more such flows. Also, findings displayed combination performed only one dataset. conclusion, research gives useful applied insights GWRR data sources modeling studies, limited regions.