hydroelectricity       
noun [ U ] uk/ˌhaɪ.drəʊ.ɪ.lekˈtrɪs.ə.ti/ us/ˌhaɪ.droʊ.ɪ.lekˈtrɪs.ə.t̬i/
 水力发电
electricity produced by the force of fast-moving water such as rivers or waterfalls
  The area relies heavily on hydroelectricity. 该地区严重依赖水力发电。 
 Alternative power sources used include solar power, hydroelectricity, and wind power. 使用的替代电源包括太阳能、水电和风能。 
 See: hydroelectric
 - More examples
 - The water that flows through the city's drinking system is being used to generate hydroelectricity.
 - The new reservoir is part of the plan to increase production of hydroelectricity.
 - Water flows through the turbine, produces hydroelectricity, and returns back to the river.