美国水力发电的装机容量和发电量均占世界首位。1979年底,美国的水电站总数为1,400余个,装机容量共7,500万千瓦(其中包括抽水蓄能电站的装机容量1,100万千瓦),当年水电的发电量为3,016亿度(1度电等于1千瓦·小时),均约占全国总装机容量和总发电量的八分之一。廉价的水电曾为早期美 The United States has the world’s largest installed capacity and generation of hydropower. At the end of 1979, the total number of hydropower stations in the United States was more than 1,400, with a total installed capacity of 75 million kilowatts (including an installed capacity of 11 million kilowatts of pumped-storage power stations). At that time, hydropower generated 300.1 billion kilowatt-hours (1 kilowatt equals 1 kilowatt). Hours), which account for about one-eighth of the country’s total installed capacity and total power generation. Cheap hydropower was once an early stage of beauty