Performance Evaluation of Satellite Rainfall Data in the Bheri River Basin, Nepal

Nepal is a mountainous country with very difficult terrain so, there are not available Meteorological stations. In such conditions, Satellite Precipitation Products (SPPs) can be used for water resources studies. The Bheri River Basin is studied in this research. Hydrological model is developed for the Bheri River Basin using HEC-HMS. Calibration and Validation was done with ground rainfall data at two stations, Jamu and Samaijighat. For the calibration, the values of NSE, PBIAS and R2 were 0.73, -12 and 0.77 at Jamu and 0.80, -5.5 and 0.83 at Samaijighat. For the validation, the values of NSE, PBIAS and R2 were 0.70, 0.3 and 0.72 at Jamu and 0.80, -3.9 and 0.81 at Samaijighat. For the same model, performance of the model was evaluated by measuring NSE, PBIAS and R2 by providing bias adjusted GPCP1DD rainfall data which resulted in satisfactory model performance at Jamu and good at Samaijighat.