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Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
Impact of dams roumenova yanev_yaramov_10_4
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Impact of dams roumenova yanev_yaramov_10_4

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  • 1. By Violeta Roumenova, Daniel Yanev, & Emil Yaramov 10/4
  • 2. Environmental Impact
    • The turbines slow the water which then contains very little sediment which can lead to destruction of riverbanks (7.)
    • Lack of fish ladder blocks natural migration paths of fish-may
    • Might produce very high amounts of greenhouse gases (4.)
    • Contribute to earthquakes (3.)
  • 3. The Turbines Slow the Water
    • Fast water flowing from the river holds sediments
    • When it goes to the dam the water becomes very slow which leads to sedimentation (7.)
    • This increases the erosion down the river which can lead to destruction of river banks
    • This can be controlled by dredging and protecting the natural vegetation cover (7.)
  • 4. Lack of Fish Ladder Blocks
    • Lack of fish ladder blocks natural migration paths of fish
    • May lead to destruction of an entire ecosphere
    • This can be fixed by regulating the downstream flow and clearing natural vegetation (7.)
    http://www.rideforclimate.com/usa/blog/?page_id=61&g2_itemId=1073
  • 5. High Amounts of Greenhouse Gases
    • The vegetation flooded by the reservoir rots producing methane as they decay
    • When methane rises most of it oxidizes to form carbon dioxide (4.)
    • 95% of the methane produced is emitted at spillways, turbines and downstream
    • Have higher global warming impact than fossil fuel plants (4.)
  • 6. http://ngadventure.typepad.com/blog/2008/08/the-adventure-6.html
  • 7. Contribution to Earthquakes
    • Two theories
    • The mass of the water alters the stress points on the bedrock causing it to move (adjust) (3.)
    • Increases the groundwater pressure causing stress on the bedrock
    • Causes micro-seismic activity (<4.0 Hoover dam) (3.)
  • 8. Dam Pressure http://www.coffsharbour.nsw.gov.au/www/html/508-karangi-dam.asp
  • 9. Benefits
    • Hydro power plants located at the lowest point of the dam wall
    • Produce electricity without using non-renewable resources (7.)
    • Low amount of environmental harm compared to other types of power plants
    • Provide drinking water
    • Store water for dry periods (7.)
  • 10. Nile River: Aswan High Dam
    • Location:
    http://en.wikipedia.org/wiki/File:Lake_Nasser_location.png
  • 11. The Aswan High Dam
    • http://en.wikipedia.org/wiki/File:Aswan_dam.jpg
  • 12. Aswan High Dam: Problem and Impacts
    • Cause of problem: poor drainage => saturation and increase in salinity (5.)
    • Impact:
      • Economic: more than 1⁄ 2 of Egypt's farmland soil has worsened=>less crops produced (trade also affected)
      • Human health: number of individuals affected by the parasitic disease schistosomiasis (associated with stagnant water) has increased
      • Ecological: soil of farmlands becomes useless; salinity and poor drainage destroy soil (5.)
  • 13. Aswan High Dam: Problem Solution
    • Possible solutions:
      • Installation of wells to lower water table
      • Replacement of foundation stones with other materials
      • Injection of a chemical sealant between the structures and the soil in order to create a barrier (1.)
    • This may be very expensive to accomplish
    • In addition, the construction of each of the above may cause harm to the surroundings (1.)
  • 14. Sacramento Delta: Shasta Dam
    • Location:
    http://www.sellingredding.com/bloggingredding/wp-content/uploads/2008/09/redding_ca.gif
  • 15. The Shasta Dam
    • http://cee.engr.ucdavis.edu/faculty/lund/dams/Shasta/ShastaDam.html
  • 16. The Shasta Dam: Major Problem
    • Raising of dam => flooding of nearby canyons => endangering surroundings (wildlife, forests, etc.) = interference with other ecosystems (even destruction of ecosystems) (2.)
    • Money costs may also result (6.)
  • 17. Works Cited
    • 1.&quot;Aswan High Dam.&quot; People and Place. 13 Apr. 2007. 8 Jun. 2010. <http://www.outreachworld.org/Files/u_texas/aswan_high_dam.pdf>.
    • 2.Dawson, Elizabeth . &quot;Shasta Dam.&quot; Shasta Dam. 5 Dec. 1994. 8 Jun. 2010. <http://cee.engr.ucdavis.edu/faculty/lund/dams/Shasta/ShastaDam.html#Photographs>.
    • 3.&quot;Do Dams Cause Earth Quakes ? &quot;. Yahoo!Answers. 15 Jun. 2010. <http://in.answers.yahoo.com/question/index?qid=20080830010806AALXvOL>.
    • 4.McCully, Patrick. &quot;Greenhouse Gas Emissions from Dams FAQ&quot;. International Rivers. 06/15/2010 <http://www.internationalrivers.org/node/1398>.
    • 5.Rosenberg, Matt . &quot;Nile River: Aswan High Dam Controls The Nile River.&quot; About.com: Geography. 27 Jul. 2009. 8 Jun. 2010. <http://geography.about.com/od/ specificplacesofinterest/a/nile.htm>.
    • 6.&quot;Shasta Dam.&quot; Wikipedia: The Free Encyclopedia . 29 May. 2010. 15 Jun. 2010. <http://en.wikipedia.org/wiki/Shasta_Dam#Arguments_against>.
    • 7.&quot;SwissDams&quot;. International Commision on Large Dams. June 15, 2010. <http://www.swissdams.ch/Committee/Dossiers/BandC/Benefits_of_and_Concerns_about_Dams.pdf>.

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