tidal barrages Flashcards

1
Q

what is the most common way to generate electricity through tides

A

tidal barrages

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2
Q

what are tidal barrages

A

big dams built across river estuaries with turbines in them

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3
Q

how do tidal barrages work

A

as the tide comes in, it fills up the estuary
the water is then allowed through the turbines at a controlled speed

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4
Q

how are tides produced

A

by the gravitational pull of the sun and moon

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5
Q

what are the main problems of tidal barrages

A

preventing free access by boats
spoiling the view
altering habitat

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6
Q

what is the only draw back of tidal barrages

A

the height of the tide is variable so lower tides will provide significantly less energy than bigger “spring” tides

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