Research on Reservoir Water Temperature Simulation and Fish Response

Temperature is an important parameter for a body of water, affecting chemical and biological reactions as well as the material exchange. It is also important with respect to the water environment and the growth and propagation of microbes. Water temperature research addresses two important aspects: the impact on the environment due to water temperature change caused by human activities, and better analysis of reactions related to water temperature. Deep reservoirs have both vertical and horizontal temperature stratification. This paper establishes a 2D water temperature model for the Panjiakou Reservoir and simulates the stratification phenomena. Temperature was simulated from May to October 2010, and the diffusion parameters were confirmed. Results showed distinct stratification from May to August with vertical equality from September to October. From May to June, water temperature downstream declined because of discharging. Discharged water temperature significantly affects the spawning time of fishes downstream and can delay spawning by up to a month.