ANNOUNCEMENTS
Evaluation of the impact of climate change on the streamflow of sot river basin was carried out in the study. Before conducting the future climate assessment, SWAT model was calibrated for 21 years and validated for 15 years, using the monthly streamflow data. The model’s performance was evaluated to be good, using quantitative statistics during the calibration (NSE = 0.73, RSR = 0.52) and validation (NSE = 0.74, RSR = 0.51). However, the negative value of PBIAS indicated overestimation in the streamflow (PBIAS = -23 for calibration; PBIAS = -21.4 for validation). For the future assessment, 3 Atmosphere- Ocean Coupled General Circulation Models (AOGCMs) of CMIP 5 were used for RCP 4.5 and RCP 8.5. The output of three GCMs (MIROC 5, GFDL-ESM2G, CNRM- CM) was downscaled using LARS-WG for the period of 2040- 2069 (representing 2050s) for carrying out the future impact of climate change. The results indicated an overall increase in streamflow during the pre-monsoon and post-monsoon period with an increase in temperature and precipitation over the basin area.
Keywords: Sot river basin, Climate Change, Streamflow, SWAT, LARS-WG.
