Presentation is loading. Please wait.

Presentation is loading. Please wait.

Patrick D. Murphy Department of English University of Central Florida Damning Damming Modernity: The Destructive Role of Megadams.

Similar presentations


Presentation on theme: "Patrick D. Murphy Department of English University of Central Florida Damning Damming Modernity: The Destructive Role of Megadams."— Presentation transcript:

1 Patrick D. Murphy Department of English University of Central Florida Damning Damming Modernity: The Destructive Role of Megadams

2 Water is required for everything from the life of the human body to the irrigation of crops, to the half a million gallons of water per minute that must flow to cool nuclear power plants. Only 2.5% fresh water most of that locked up in icecaps and glaciers Only 1% of the earth's water is available for human use.

3 Hoover Dam on the Colorado River

4 Himalayan Dam Projects, existing and proposed in Pakistan, India, Nepal, and Bhutan

5 Massive plans are underway in Pakistan, India, Nepal and Bhutan to build several hundred dams in the region, with over 150,000 Megawatts (MW) of additional capacity proposed in the next 20 years in the four countries. If all the planned capacity expansion materialises, the Himalayan region could possibly have the highest concentration of dams in the world. -- Mountains of Concrete: Dam Building in the Himalayas, International Rivers, 2008

6 Climate Change Impact on Himalayan Rivers The impact of global warming is already being felt much more in the Himalayas than in other parts of the world. This is resulting in the accelerated melting of glaciers and the depletion of the massive water store of the region..... The impact of climate change will be aggravated by the construction of hundreds of dams. As glaciers melt, water in the rivers will rise, and dams will be subjected to much higher flows, raising concerns of dam safety, increased flooding and submergence. With the subsequent depletion of glaciers there will be much lower annual flows, affecting the performance of such huge investments. Climate change will also increase the threats of Glacial Lake Outburst Floods (GLOFs) and possible cascading failures of downstream dams – Mountains of Concrete

7 Hoover Dam Failing to Fulfill Promise The demand for water from the Colorado River Basin has now far outstripped supply, and the problem's only getting worse as temperatures rise and the water table is shrinking. Thanks to a decade-long drought, the Lake Mead reservoir in Nevada is about 120 feet below its high- water mark (and if it dips another 42 feet, the dam will have to shut off and will no longer be able to provide hydroelectric power for the region). … When the Hoover Dam was originally proposed in 1922, governors from the seven states in the Colorado Basin were told that the new reservoir would provide enough water to meet all their needs and allow growth without end. -- Bradford Plummer, July 9, 2010

8 Don Sahong Dam, Laos Planned to be built to sell electricity to Thailand

9 Bakun Dam on Sarawak Island

10 Sarawak Proposed Dam Projects

11 Roghun Dam, Tajikistan Begun in Soviet Era

12

13 Arundhati Roy The Greater Common Good Power Politics

14 Narmada River Dams Planned

15 Tibet: The Water Tower of Asia

16 Assama megadam development proposals area

17 Two Major rivers of Central Asia

18 Dams in Kashmir Indian Dams on Right Baglihar Dam on Chenab River

19 New Chinese Dams on the northern Mekong, including the world’s tallest dam under construction, the Xiaowan.

20 Senge-Ali Dam Keeping the users of Indus River water uninformed, China has built a dam at catchment area of the river in Tibet at Senge-Ali. Alice Albinia, “All the water that drains from these mountains, I remember, is currently being stopped by the new dam at Senge-Ali,” she wrote.

21 DIM Discrete Incident Mentality

22 80,000 dams of varying sizes in the United States 85% of them are fifty years old or older. One-third of these are estimated to be at high risk of failure

23 Aswan High Dam

24 Tarbela Dam, Pakistan Completed in 1976, Tarbela Dam was assumed to have a lifespan until 2030. However, given that over 6 billion tons of sediment (sand, silt and mud) have already accumulated in the first twenty-five years, it is very possible that Tarbela Dam may become ineffective over a shorter than predicted period of time.

25 Salinization inhibits production of one- fifth of all irrigated cropland globally

26

27

28

29

30


Download ppt "Patrick D. Murphy Department of English University of Central Florida Damning Damming Modernity: The Destructive Role of Megadams."

Similar presentations


Ads by Google