by colten parr meghan ryan and jamie schroeder
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By Colten Parr, Meghan Ryan, and Jamie Schroeder. DAMS. What Is a Dam?. Barrier constructed to contain water flow Sometimes can generate electricity Promotes irrigation Controls flooding in local areas. How Does a Dam Work?. Dams are often triangular for strength

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Presentation Transcript
what is a dam
What Is a Dam?
  • Barrier constructed to contain water flow
    • Sometimes can generate electricity
    • Promotes irrigation
    • Controls flooding in local areas
how does a dam work
How Does a Dam Work?
  • Dams are often triangular for strength
  • Giant wall withstands pressure
  • Excess water stored, released when needed
  • Locks and gates contain water sometimes
requirements of a dam
Requirements of a Dam
  • Dams must be water tight
  • Must have ample strength
  • Ability to release certain water amounts
  • Capacity to contain large quantities
benefits of dams
Benefits of Dams
  • Store flood water for human usage
  • 10% of irrigation water from dams
  • Navigation occurs on dam water
  • Dam water is good for recreation
hydroelectric dams
Hydroelectric Dams
  • Water travels to “powerhouse” near dam
  • Water then spins turbines repeatedly
  • Electricity is created cleanly and resourcefully
gravity dams
Gravity Dams
  • Use gravity to advantage
  • Heavy materials push down
  • Water pressure doesn’t do much
arch dams
Arch Dams
  • Notches cut in stonewalls
  • Curved arch placed in notches
  • Water pushes the arch into notches
buttress dams
Buttress Dams
  • Water pushes against the dam wall
  • Supports push back
  • The buttresses prevent movement
embankment dams
Embankment Dams
  • Entirely made of clay and earth
  • Water resistant soils are specially placed
  • Dam keeps the water in place
impact on environment
Impact on Environment
  • Environmentalists hate continued use of dams
  • Dams interfere with natural processes
  • Different fish species are affected
  • Minerals or extra salts may present
references
References
  • https://www.llnl.gov/str/June07/gifs/dam1.gif
  • http://www.cromwell.org.nz/aerial_photos/images/Clyde%20Dam_jpg.jpg
  • http://www.fema.gov/hazard/damfailure/benefits.shtm
  • http://www.fema.gov/hazard/damfailure/index.shtm
  • http://science.jrank.org/pages/1942/Dams-Impact-dams.html
  • http://www.pbs.org/wgbh/buildingbig/dam/index.html
  • http://idahoptv.org/dialogue4kids/season4/dams/facts.cfm
  • http://en.wikipedia.org/wiki/Environmental_impacts_of_dams#Impact_above_dam
  • http://www.bpa.gov/corporate/BPANews/Library/images/Dams/
  • http://www.wisegeek.com/how-do-dams-work.htm
  • http://members.optusnet.com.au/~engineeringgeologist/page5.html
  • http://www.ussdams.org/howdam.html
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