![]() Damming a bay restricts fish migration, ship traffic and causes sediments in the bay to accumulate more rapidly. Just as in the case of large dams, tidal barrages, too, have a great impact on their environment. Examples of successfully operating plants of this type can be seen in South Korea, France, the Russian Federation, or China. Theoretically, it is possible to use the turbines in both flow directions but it is more economical if they are used only during ebb-tide. During ebb-tide the water is discharged through a barrier fitted with turbines. Tidal power plants operate on the principal of capturing water in a basin at high tide. By the balancing the water levels, the water flow is created to spin the turbines. Tidal power plant exploits the difference of the water level in the bay and on the open sea arising in various stages of the tide. Video: Tidal power plant working principle.
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