Humans have use dams since early civilization , because four-thousand geezerhood ago they became aware that floods and droughts affected their social welfare and so they began to manikin dams to protect themselves from these effects. The basic principles of dams still practice today as they did before; a dam must(prenominal) prevent water from being passed. Since then, people have been proceed to build and sinless these structures, not knowing the full metier of their side ...If you loss to get a full essay, parliamentary procedure it on our website: OrderCustomPaper.com
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