مدل‌سازی بارش- رواناب در شرایط تغییر اقلیم به‌منظو ر پیش‌بینی جریانات آتی حوزه صوفی‌چای

Two major issues through studies on hydrological impact assessment of climate change are the sufficiency of historical data and selection of the best rainfall-runoff model. Climate models, with the ability to simulate climatic variables, are considered as references for future projections. Therefore, the rainfall-runoff model must be able to simulate streamflow using only these variables. Current study addresses a methodology of choosing the best model from global climate models for impact assessments which require local-scale climate scenarios. The approach is based on the use of a weather generator which can generate the local-scale daily climate scenarios used as an input in many process-based impact models. The results of analysis of Sufichay streamflows, which flow in Urmia lake basin, by the rainfall-runoff model of IHACRES, indicated a considerable difference between the climate models under emission scenarios A2 for the future period 2046-65. There were no noticeable differences under emission scenarios B1 for both future periods (2011-30 and 2046-65) and under emission scenarios A2 for the near period (2011-30) especially in warm seasons. The uncertainty of selecting different emission scenarios was low for the period 2011-30 and high for the mid-century (2046-65).