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QWhy does the wave height of a tsunami increase as the tsunami enters shallow water?

In shallow water , the wind drove the tsunami to push a smaller water column .
In shallow water , the energy of the tsunami must be contained within a larger water column .
In shallow water , the tsunami energy must be contained within a smaller water column .
In shallow water , the wind drove the tsunami to push a larger water column .

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#2ClementAnswered at 2013-04-14 13:46:07
Basically , the front slows down and the back is updated
#3GMAnswered at 2013-04-25 15:48:38
Closest answer is 2 and 3, the energy is first in a large volume of water as it approaches the coast , water being ' energy ' , pushes up on the reef / coastal creating a wave of height .
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Why does the wave height of a tsunami increase as the tsunami enters shallow water?

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