目前,功率在100万千瓦以上的水电站和蓄能式水电站已超过一百个,其中25个电站(译注:不包括苏联的水电站,下同)功率在200万千瓦以上(表1)。这些电站大多数(即20个)集中在北美洲和南美洲,特别是集中在加拿大(5个)和巴西(8个)。很多大型水电站分两期和多期兴建,采 At present, there are more than 100 hydropower plants and storage-type hydropower plants with a power of more than 1 million kilowatts. Among them, 25 hydropower stations have power over 2 million kilowatts (Table 1). The majority (20) of these stations are concentrated in North and South America, with particular focus on Canada (5) and Brazil (8). Many large hydropower stations in two phases and multiple construction, mining