电厂热排水对水生生态系统的影响

Effects of Thermal Discharge from Power Plant on Aquatic Ecosystems

研究了电厂热排水对水生生态系统的影响。结果表明 ,除深水水库的底层外 ,溶解氧含量一般不低于5.0mg/L。非离子态氨的含量随着水温的升高而升高。水温的升高还引起离子含量的升高。浮游动物群落结构也与水温的升高有关 ,水温为30℃时浮游动物群落的物种多样性最高。水温升高使鲤鱼的产卵期提前 ,但是在早春的孵化率很低。

Effects of thermal discharge from power plant were studied.The dissolved oxygen (DO)content was generally not less than 5.0mg/L,except at the bottom layer of deep reservoirs.The content of non-ionized ammonia increased with rising temperature.Increase of water temperature could lead to augmentation of ions content.The change in zooplankton community structure related to rising water temperature,i.e. the diversity index of zooplankton community was highest in water with a temperature of 30℃.Carp spawned earlier in water of rising temperature,but the eclosion rate was very low in early spring.