Abstract:In order to explore new measures to relieve the effects of thermal stratified reservoirs.By taking a built large reservoir as an example,a temperature control curtain was used to improve the effects.Laterally 2-D water temperature model was applied to compute water temperature of vertical stratified reservoir and selective water withdrawal.Six curtain plans were designed which included different height,submerged depth and location of curtain.Water temperature and flow field were also analyzed.The results showed that water temperature profiles and flow field were noticeably influenced by curtain.The bottom water was inhaled more in the 3 partial shield plan,these three plans could not improve temperature of withdrawal.However,bottom full shield plans improved the water temperature obviously,a large amount of surface water was taken,which made the temperature of reservoir reduced evidently.Submerged depth should be determined by the thickness of water intake layer.There would be a better effect when submerged depth was near the thickness of water intake layer.The effect of curtain position on the withdrawal water temperature was not obvious.Compared with no curtain,the water temperature raised 3.4, 2.1, 1.1, 0.4 ℃,respectively between May to August.