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Why do dams need to be thicker on the bottom and thiner at the top?
Wiki User
∙ 12y ago
because the water pressure on the damn is much higher on the bottom of it than the top.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoThey don't "need to be",
but the forces trying to destroy the dam are greater at the bottom of the dam
due to the weight of the water behind it.
Wiki User
∙ 13y agoThe bottom part of the dam has to support (a) more water pressure, (b) the weight of the dam above it.
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