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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