DAMS http://www.cromwell.org.nz/aerial_photos/images/Clyde%20Dam_jpg.jpg http://www.centralbasin.org/blog/wp-content/uploads/2009/ directions.jpg http://www.goodlife.com.ng/uploads/Yeunde-Farinloye_120_dam1.gif http://www.destination360.com/north-america/us/nevada/las-vegas/images/s/las- vegas-hoover-dam.jpg http://www.physics.uiowa.edu/~umallik/adventure/nov_06-04/Grand%20Coulee%20Dam.jpg
Dams 10 1 final
Sep 03, 2014
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- DAMS http://www.cromwell.org.nz/aerial_photos/images/Clyde%20Dam_jpg.jpg http://www.centralbasin.org/blog/wp-content/uploads/2009/03/hoover-dam-directions.jpg http://www.goodlife.com.ng/uploads/Yeunde-Farinloye_120_dam1.gif http://www.destination360.com/north-america/us/nevada/las-vegas/images/s/las-vegas-hoover-dam.jpg http://www.physics.uiowa.edu/~umallik/adventure/nov_06-04/Grand%20Coulee%20Dam.jpg
- Dam Structure http://www.americanwhitewater.org/photos/archive/medium/18665.jpg
- Dam Structure 2 http://4.bp.blogspot.com/_GmlJ2al7e_k/Su2-BeKr25I/AAAAAAAAGwc/QsNga5IwUT8/s400/damgif
- Dam Structure
- Impermeable Membrane
- Strength
- Outlet Valve
- Spillway
- Types of Dams
- Concrete
- Gravity
- Arch & Buttress
- Fill (Embankment)
- Earth
- Earth & Rock Fill
- Concrete Faced Rock Fill
- Uses of Dams
- To provide H 2 O (towns/irrigation)
- To store waste (from mines)
- To generate electricity
- To help control floods
- Positive Sides of Dams
- 20% of electrical energy production
- Cheap energy
- Long life
- Attracting tourists
- Negative Impacts of Dams http://upload.wikimedia.org/wikipedia/commons/b/b5/Arch_dam_Oymapinar_%28Manavgat_River,_Turkey%29.JPG
- Impacts on Water Diversion
- Upstream ->stationary reservoir:
- standing water for long periods 1
- organic material-> decompose-> consume the limited oxygen-> dead zones 1
- algae growth (toxic for rivers) 1
- temperatures: too low at the bottom and too high on the surface no turnover 1
-
- Downstream:
- Depends on the season-long periods without flow 2
- Flow-high Energy of water- moves rocks, sand, sediments 1
- Water- polluted, without oxygen, smells rotten (sulphurous hydrogen disposal) 2
- The ecosystem-damaged 2
- Impact on Fish 5
- http://inadawords.com/wp-content/uploads/2008/01/nemo.jpg
- Dams prevent the migration: salmon ->river-> sea
- Fish cannot pass the dam ->not enough food-> die
- Slow moving water: many fish-> victims of predators
- No circulation (t is not balanced), not enough oxygen, toxic water ->death
- Impacts on Human
- People have to abandon their home, agricultural lands, environment-> start living in a new way, adjust to new conditions 4
- Collapse: lack of precise engineering 3 , too much rain 4
- China is plagued by the world's worst dam hazards (Minister Chen) , rainfalls, earthquakes 4
-
- Immediate evacuation
- Causes: floods-> death of many people, environmental destructions 4
- Living near dam-dangerous(esp. in China) 4
- Aswan Dam http://geoeyemediaportal.s3.amazonaws.com/assets/images/gallery/manmade/structures/hires/aswan_dam.jpg http://upload.wikimedia.org/wikipedia/commons/6/6a/Lake_Nasser_location.png
- Aswan Dam
- Aswan Dam is the general name for two dams High and Low dam.
- Low constructed in 1902
- High 1970
- Aim = to increase the economic production trough regulating the annual river flooding
- Aswan Da m - Benefits
- Decreased the effect of the dangerous floods 1964 and 1973
- Increased the farmland drastically
- Powered a huge amount of the country
- Aswan Dam Enviromental and cultural problems
- Flooding lower Nubia
- Silt held back
- Logging soils
- Erosion
- Endangering historical sites
- Aral Sea D am http://upload.wikimedia.org/wikipedia/commons/8/85/Aral_map.png http://guanakolandia.files.wordpress.com/2010/04/mar-de-aral-aral-sea-dam_788415c.jpg
- Aral Sea
- One of the biggest lakes on Earth
- Located in Central Asia between Kazakhstan, and Uzbekistan
- Dam project in 2005 in order to save the Aral Sea
- Aral Sea
- Nearly destroyed ecosystems!
- Health problems for people
- Almost no fishing industry
- Last hope the dam
- The last attempt to save the sea was to build a Dam
- Water lever raised by 12m
- Salinity was dropped
- Fishing rates raised again
- Work Cited
- 8. Antelava, Natalya. "BBC NEWS | Asia-Pacific | Dam Project Aims to save Aral Sea." BBC NEWS | News Front Page . BBC, 9 Apr. 2007. Web. 14 June 2010. .
- 6. Antelava, Natalya. Dam project aims to save Aral Sea . BBC News . BBC, 2010. Web. 14 June 2010. .
- 3. Kelly, Peggy. Cause of St. Francis Dam collapse more concrete than initially verified. Santa Paula Times Online . Santa Paula Times, 2010. Web. 14 June 2010. .
- 4. More than 37,000 Chinese dams could collapse from excess rain. AsiaNews.it . Autogestione contenuti di AsiaNews, 8 May 2009. Web. 14 June 2010. .
- 1. Poorly Run Hydro. Dam Effects . Hydropower Reform Coalition, 2009. Web. 14 June 2010. .
- 2. Sait TAHMSCOLU, M., et al. POSITIVE AND NEGATIVE IMPACTS OF DAMS. DSI . N.p., 2007. Web. 14 June 2010. .
- 5. Smith, S. E. Why are Dams Potentially Harmful to Fish? Wise Geek . conjecture corporation , 12 Apr. 2010. Web. 14June 2010. .
- 7. "The Kazakh Miracle: Recovery of the North Aral Sea." Environment News Service . Environment News Service (ENS), 1 Aug. 2008. Web. 14 June 2010. .
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