Hydroelectricity is a major source of electricity in Turkey, due to its mountainous landscape and many rivers. The country's main river basins are the Euphrates and Tigris. Over 700 hydropower plants have been built, and they make up about 30% of the country's electricity generating capacity. Annual generation varies greatly,[a] and in rainy years lots of hydroelectric power can be generated. Government policies have generally supported building dams, but some are controversial in neighbouring countries, and some raise concerns about damage to the environment and wildlife.[2]
In 2021, 56 terawatt-hours of hydroelectricity was generated, which was 17% of Turkey's total electrical generation,[3] from 31 GW of capacity.[4] According to analysts at S&P Global, when there is drought in Turkey during the peak demand for electricity in August, the aim of the State Hydraulic Works to conserve water for irrigation can conflict with the Turkish Electricity Transmission Corporation's goal of generating electricity.[5] Although Turkey's energy strategy may change in the future, due to climate change causing more frequent droughts,[6] hydropower is predicted to remain important for load balancing with solar and wind power.[7]: 72 However little new capacity is expected to be built, as the Energy Ministry says hydropower has reached its limit.[8]: 24 Converting existing dams to pumped storage has been suggested as more suitable than building new pumped storage.[9]
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