1 / 11

Dams

Dams. What do they do?. Prevents Flooding Irrigated Farmland Generates tremendous amounts of energy. Arch Dam. A re good for narrow, rocky locations. They are curved, and the natural shape of the arch holds back the water in the reservoir.

mardi
Télécharger la présentation

Dams

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Dams

  2. What do they do? • Prevents Flooding • Irrigated Farmland • Generates tremendous amounts of energy

  3. Arch Dam • Are good for narrow, rocky locations. • They are curved, and the natural shape of the arch holds back the water in the reservoir. • They are thin and require less material than any other type of dam. Arch dam: El Atazar Dam – Spain

  4. Forces on an arch dam Arch Dam: ForcesThe arch squeezes together as the water pushes against it. The weight of the dam also pushes the structure down into the ground.

  5. Buttress Dam • May be flat or curved • A series of supports, or buttresses, brace the dam on the downstream side. • Most buttress dams, like the Bartlett Dam in Arizona, are made of reinforced concrete. Buttress DamBartlett DamVerde River, Arizona

  6. Forces on a Buttress Dam • Water pushes against the buttress dam, but the buttresses push back and prevent the dam from toppling over. The weight of the buttress dam also pushes down into the ground.

  7. Embankment Dams • Most commonly built dams in the United States. • They are massive dams made of earth and rock. • Like gravity dams, embankment dams rely on their heavy weight to resist the force of the water. Embankment dam: New Waddell Dam

  8. Forces on an Embankment Dam Water pushes against the embankment dam, but the heavy weight of the dam pushes down into the ground and prevents the structure from falling over.

  9. Gravity Dams • Massive dams that resist the thrust of water entirely by their own weight. • Requires a LOT of concrete. • People prefer its solid appearance to the thinner arch and buttress dams. Gravity DamGrand Coulee DamGrand Coulee, Washington

  10. Forces on a Gravity Dam • Water pushes against the gravity dam, but the heavy weight of the dam pushes down into the ground and prevents the structure from falling over.

  11. To conclude • All dams -- whether they're embankment, buttress, arch, or gravity -- must be maintained as they get older. • Without proper maintenance, spillways can clog and concrete can crack. Some dams are even removed because they block the migration of fish.

More Related