针对电厂热排水对水生生态环境的影响，通过野外监测的方法，在辽宁省大伙房水库就热排水对浮游藻类的季节变化影响进行了深入研究。研究结果表明：在春、秋、冬三季，增温对浮游藻类的种数、密度和生物量均起促进作用，在夏季则对种数、生物量则起抑制作用。高温引起蓝、绿藻数量增加和硅藻明显减少。 Aiming at the impact of thermal drainage on aquatic environment, the paper studies the influence of thermal drainage on the seasonal variation of phytoplankton in Dahuofang Reservoir in Liaoning Province through field monitoring. The results showed that in spring, autumn and winter, warming increased the species, density and biomass of phytoplankton, but inhibited the growth of species and biomass in summer. High temperature caused by blue, green algae increased the number and diatom significantly reduced.