Water Temperature Monitoring and Characteristics Analysis of a Hydropower Station

In order to understand the structure of water temperature in front of the dam and the temperature of the water discharged after the reservoir is impounded, and to analyze and study the methods for slowing down the discharge of low-temperature water, a self-built automatic water temperature monitoring system is built to online monitor the water temperature in front of the dam and the water temperature of the river below the dam after the operation of a hydropower station. The monitoring found that the water temperature in front of the dam of the station has been stratified during the year, and the temperature of the discharged water is lower than the natural water temperature, and there is a phenomenon of low temperature water in spring and summer. Moreover, the discharge water temperature of the station is not correspondingly equal to the water temperature at the water intake, but is equivalently shifted upward compared to the water temperature elevation distribution at the water intake. In order to alleviate the adverse effects of the low-temperature water released by the hydropower station, the method of accelerating the decline of the reservoir water level from March to May and slowing down the rise of the reservoir water level from July to August. The monitoring data and analysis conclusions can provide support for in-depth research on the water temperature structure of the reservoir and ecological regulation to mitigate the adverse effects of low-temperature water discharge.