Monday, December 17, 2012

Three Gorges Dam


Three Gorges Dam

What is the Three Gorges Dam? Why should we care about what it? These are some of the important questions to answer when talking about the world’s largest hydropower project.  The dam became fully functional on 4 July, 2012, and has cost a reported 24 billion dollars. It has the ability to produce an immense about of power, to be more precise 84.7 billion kW (unit of power equal to 1000 watts) annually. The dam is a massive 7,661 feet long, at the top, and it has a reservoir 410 mile reservoir.  It provides 20 million households electricity. To put it in context, the Three Gorges Dam is about five times larger than the Hoover Dam. This is incredible, especially if you have seen the immense size of the Hoover Dam.
Given what I have told you the Three Gorges Dam seems like a modern marvel. Not only does it help provide electricity for people, but it also helps prevent flooding. However, once you start looking at what had to happen to get the dam built and what toll it has had on the ecosystem in China things get interesting. . 

Displacement of people was the primary issue of those that opposed the dam’s approval in 1992. The construction of the dam displaced 1.5 to 4 million people. This is a large number. The people that were displaced had to leave lands that their families had occupied for years. Proper compensation was not usually given. Only a minority received enough to start a new life in a different area. Those that were not given enough were not even given help to relocate. The government sees the dam as a much needed tool for energy, and that it is a green source of energy. I, among other opposition, see it as a huge abuse of power that has led a substantial amount of people into poverty.

The dam has also been linked to something called reservoir-induced seismicity. Reservoir-induced seismicity becomes a problem when a dam is built on a fault line. The Three Gorges Dam sits on the Jiuwanxi and Zigui-Badong faults. These faults become strained because of the large amount of water on top of them. This strain creates earthquakes, which are usually small, but in some occasions can cause significant damage. Earthquakes generated by dams are nothing new. For example, California’s Oroville Dam, in the foothills of the Sierra Nevada has had the same issues. However, this dam is much smaller, so it creates much less earthquakes. The government was warned of this before construction began, but they did not listen. This shows complete negligence and because of it a large amount of people could die.

Animals and plants have been threatened because of the floods generated by the dam’s placement. This is an issue because China is the home to 10% of the worlds rooted plants (vascular plants). Of that 10% about 20% are located in the dam’s vicinity. This means that a large flood could destroy a great percentage of these plants. The dam has also hurt many natural environments because it has changed flow patterns. This means that areas that used to not get flooded are, and areas that are used to getting flooded are not. Animals and plants over time evolve to the areas they are in. This means that plants grow where they are going to benefit most from the area. Animals understand patterns and stay away from risk if risk is there. However, these changes catch plants and animals off guard and result in their death. The dam water is also highly polluted which has caused fish to start dying. Fish are very important to the people of China, and pollution has been an issue in that matter for some time. Solving these problems has been a goal for many villages and outside forces, but the government and large companies within China don’t see the problem.

There is a lot that needs to be done, and people are trying. The only issue is that most of the work being done is not by those that can actually do something. Until the government realizes that this project has severe consequences the issues will continue. Even if countries such as the United States and Germany try to pressure China they will not succeed. China sees this project as something beneficial, and the government will not lose face with its people by saying that it is wrong. This goes back to Chinese history, and the government’s constant need to show that it’s able. A solution might be possible, actually it is, but it is unlikely until the government becomes more concerned.

                

Thursday, December 13, 2012

Post:1 after class and going forward!

My Urban Environmental History class is over, but I have decided with a little guidance from my instructor to continue my research. I will still post on Iowa, but I will also incorporate other states, countries, environmental justice, and hopefully posts from other people, ones that have been through a flood personally. 

Reasons for new approach:

Other States: the 1000 year flood in Tennessee would be the main answer, but also Hurricanes suck as Sandy, Katrina, and Andrew

Countries: the documentary  "Flow" got me interested in water contamination due to dam creation.The Three Gorges Dam in China. It's construction caused 1.7 million people to lose their homes. The link on the dam will take you to Scientific American (link to the about us page for Scientific American), which is a web based science magazine. The title of the article is 

China's Three Gorges Dam: An Environmental Catastrophe? by: Mara Hvistendahl

From the title you might guess what the article will cover. I will try and review the article and get more information about the Three Gorges Dam on here tomorrow. I'd do it today but, I still have finals to write.

Other countries that interest me are Russia, England, the whole area ravaged by the 2004 Tsunami (this link will take you to a 8 part series on Youtube that show the Tsunami), then countries in Africa and South America

Environmental Justice: I want to do what flow did, but I want to do it with text. This might make more sense if you have watched the movie.

And last user input: I want post for people that have been in floods. They are the best suited to write on the subject since they have lived it.



Wednesday, December 12, 2012

Mississippi River

Great Flood of the Mississippi River, 1993

1993 Flood Programs

Flood Programs prior to 1993
  • Reservoirs and levees built by the Corps prevented more than $19 billion in potential damages.  
  •  Watershed projects built by the Soil Conservation Service saved an estimated additional  $400 million. 
  •  Land-use controls required by the National Flood Insurance Program and state floodplain management programs reduced the number of structures at risk throughout the Mississippi basin. 
  • Weather cooperated with a freeze late in the year, and spring 1994 saw only a few minor  floods. This allowed many repairs to be made. 

Flood Programs Implemented after 1993 
  • Created the Increased Cost of Compliance program within the NFIP (National Flood Insurance Program) for all people who  have a flood insurance policy. This program gives money to owners of substantially damaged properties to meet the more expensive costs of rebuilding according to a local  floodplain management ordinance. 
  • Created the Flood Mitigation Assistance program This program is funded from a surcharge added to all flood insurance policies nationwide. The money is then redistributed to states in the form of grants to be used to mitigate future flood losses.   
  •  Increased emphasis on floodplain mapping. 
  • Codified the Community Rating System (CRS) into the NFIP. The CRS is an incentive program which allows communities to reduce their costs for all flood insurance policies in exchange for going above and beyond minimum NFIP requirements. 
  • Under the Clinton Administration, FEMA targeted buyouts of flood-damaged properties as the first priority for Midwest flood mitigation funds. This initiative represented a turning point in flood recovery policy: it was the first time buyouts had been attempted on such a large scale. In the nine states that flooded, FEMA ultimately moved more than 300 homes, and bought and demolished nearly 12,000 at a cost of over $150 million. The lands were turned to flood-friendlier uses such as parks and wildlife habitat. State and federal agencies have also acquired interest in over 250,000 acres of flood-prone land. 
  • According to FEMA data, another 9,140 properties in 140 communities were elevated, acquired or relocated under hazard mitigation grants. Projects ranged in size from elevations of one or two homes in a neighborhood to entire communities moving to new locations.





http://www.dnr.ne.gov/floodplain/PDF_Files/FloodUpdateStory_Rev3.pdf

Devonian Fossil Gorge

Historic floods during the summer of 1993 poured over the emergency spillway at Coralville Lake and eroded a deep channel into the underlying bedrock deposits. It is now possible to walk across acres of Devonian-age sea floors and get a first-hand look at features normally hidden from view or glimpsed only in vertical cuts along roadsides or in quarries. The exposed rocks provide a rare opportunity for public observation of Iowa's past. 


By:Resourcesforlife
Uploaded on Mar 21, 2011
This is a short video about the Devonian Fossil Gorge near the Coralville, Iowa Reservoir.
  • Category

    Education
  • License

    Standard YouTube License




1993 Flood Overview


The start of this flood began in 1993, when above average rainfall persisted for months. This rainfall left the ground over saturated  which is perfect conditions for floods. Along with the saturated ground, the lack of sunlight helped create the flood. Without enough sunlight, the water that was already on the ground was unable to become evaporated. Finally, delayed uptake of water from plants also caused this flood.  The over saturated ground that was already present continued to become a problem as intense flash-floods created storms. These storms persisted for months which only continued to create water problems. As rivers began to overflow, water had no other place to go than the land. The water first effected places closest to the Mississippi and Missouri River than the water continued to spread inland and to other rivers and tributaries.  Along the way, the floods ruined lots of infrastructure and ruined many homes. Overall the flood affected over 23 million acres of land in the Midwest.  This powerful flood led to over $26.7 billion dollars in damage and at least 48 deaths. 


Tuesday, December 11, 2012

2008 Flood Information Session


Interview with David Hauri-Courard, Assistant Professor 
of Environmental Science and Policy at Drake University.