Li Lan¹, Wu Jian¹ and Wang Xin¹

(1 State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University,
Wuhan 430072, China)

Abstract:The water temperature prediction has been one of the important contents of the environmental impact assessment on the hydropower projects. The paper summarized advances in water temperature research for reservoir in china and abroad and studied the structure of the three-dimension environmental fluid dynamics (EFDC) model. Based on hydrological and water temperature data of Manwan Reservoirin Yunnan province, the EFDC model was calibrated for February 2004 and validated for 2003 and January 2004. The calibrated result shows that averaged absolute mean error of the three vertical on front of dam is -0.15℃ and averaged relative error is approximately 2.0%. The model was verified with a comparison to continuous time series surface water temperature in front of the dam. The absolute mean error is -0.36℃, but the model simulations exhibit the same trends as the observations.

Key words:EFDC model; water temperature simulation; reservoir