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| | SocietyGuardian.co.uk | Society Guardian | Turn of the tide |
 | | Unlike estuarine barrages, which do not generate on the incoming tide because the mass of water needs to get upstream of the barrage quickly, tidal barrages in shallower water can generate electricity on the incoming and outgoing tides. |
 | | The tides, of course, are not always going to coincide with peaks in electricity demand. |
 | | "When they are filled by the incoming tide, the seawater can be held in them, to be released later when the electricity is required, though not for so long that they would miss a tide," explains Brian Cheetham, director of Tidal Electric Swansea Bay. |
| society.guardian.co.uk /societyguardian/story/0,,1368188,00.html (1117 words) |
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