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Tide amplitude along the northwestern European Atlantic cost

Tide amplitude along the northwestern

In order to harness tidal energy efficiently, two conditions must be fulfilled: the tidal range must be as great as possible, and there must be a sufficiently large bay or a sufficiently large estuary in which the water can be retained at low or high tide.
The output of a power station that can be realized per kilometre of a barrage is a criterion of the suitability of a site.

The map shows the so-called M2 amplitude as an indication of the tidal range. The only existing tidal power station in France and several sites studied in the British Isles are circled in red.
The output in megawatts that could be achieved per kilometre of a barrage is indicated. The higher this figure, the better the cost-benefit ratio at the given site.


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