Study on Effect of Climate Change on Snowmelt Runoff Timing in Karoon Basin

The effects of climate change and a change on snowmelt runoff timing is very important in the rivers with snowmelt runoff regime. In this study the snowmelt runoff model (SRM model) and world climate change model (ECHAM4 model) are applied in order to study the effects of climate change on snowmelt runoff timing with two scenarios (A & B) for next 50 years (2000- 2050) in karoon basin in the southwest of Iran. Research results show that a shift is observed in peak time on snowmelt runoff from spring to winter and the winter stream flow is going up (10%) and the spring stream flow is going down. The summer stream flow is going down slightly and the autumn stream flow will not change considerably.