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This is because the pressure in a liquid increases with depth. This means that the pressure at the bottom of the dam is more. Hence it is more liable to break out from the dam as more pressure is exerted on the walls. So, the walls are thicker at the bottom.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agobecause the water flow at the bottom of the dam is much stronger than the top
Wiki User
∙ 11y agodue to the high force of water coming from the up the bottom wall is constructed thickly
Wiki User
∙ 7y agoThe bottom of the dam wall has a greater pressure against it because of the weight of water. Near the top, the pressure is less, so less need for a thick wall.
Wiki User
∙ 10y ago44154894
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Why dams are built thicker at the bottom?
to hold the water better but at the top it's thinner to get water in
How are man made dams different then beaver dams?
Well man made dams like the Hoover dam can support the water from overflowing while beaver dams a just basically homes.
Why are dams over rivers are made broader at bottom than at the top?
The pressure of the water (the weight) is greater at the bottom, due to the depth of the water. As the pressure is less near the top, the top of the dam wall doesn't need to be as thick as the bottom of the dam wall.
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There were 3 TVA dams on the Tennessee River in Alabama
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Bottom ones have to bear more weight
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beavers make dams
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the air gets thinner as you get nearer the top.
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It is made of wood which is been made thinner in process.
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