Reading week #7: Down go the dams The article “Down go the dams” by Jane C.Marks aim to provide an informative view on the current pending issue on Dams. The article starts out my mentioning the important nature of dams in our society. For example, Jane C.Marks states that today about 800,000 dams operate worldwide as well as the fact that most were built in the past century, primarily after World War II. Furthermore, the author lays down informative facts about dams such as the fact that dams control flooding and their reservoirs provide a reliable supply of water for irrigation, drinking and recreation which are all very important to society. In an economic standpoint, although it is very high maintenance dams provide jobs for people. The
3.5 million miles of water run throughout the United States; and since the country’s conception, over 80,000 dams have impounded 600,000 miles of these waters . Dams were originally constructed to provide water to towns and establishes energy sources for mills and later hydroelectric plants. Because these dams were constructed
Hydroelectric dams as energy sources have many advantages; they provide a renewable energy source, it can take the place of fossil fuel usages, and while being built dams can significantly help jobs in the development industry (Perlman). However, these dams are extremely costly, not just economically but environmentally and socially as well. These costs can be demonstrated by looking at the consequences of other dams. Three Gorges in China: release of methane gases, deforestation, water pollution, ecosystem disruption. Glen Canyon Dam: sedimentation, endangerment and extinction of species endemic to the area, poor water quality, crippling of ecosystems downstream—and these are just the environmental impacts! All of these
Figure 1 provides the Hoover Dam Process Diagram explaining how everything works and how the water flows until different sections. Figure 2 and 3 are pictures of the Hoover Dam that were taken during the trip. The Hoover Dam was built between 1931 to 1935. More than 21,000 men worked every day and night to complete the construction. The purpose of building the dam was to provide a reliable water supply for the southern California and control the flow of the Colorado River . It is one of the famous dams in the United States with a height of 726 feet, a length of 1244 foot, and a weight of 6.6 million tons. The project was completed almost 26 months ahead of schedule. Table 1 provides information that was taken from the day of the trip. The power output of the dam was 395 kwh, with an outflow of 11495 cubic feet per second . The outflow of the dam provides how much water is flowing through the dam and the amount power is generating . The percent full capacity of Lake Mead is 39% with a water depth of 1081.37 feet . Lake Mead is a lake on the Colorado River and the largest reservoir in the United States in terms of water capacity. Lake Mead has not yet reached full capacity. Figure 4 provides a figure of the Mike O’Callaghan-Pat Tillman Memorial Bridge where we can see the Hoover Dam. The bridge helped reduced the number of vehicles traveling across the dam . The role that the Hoover Dam has had is that it has help provide water to over 25 million people in the
Beside these arguments, there is also a more quantitative side to the debate. The ecological detriments of the Glen Canyon Dam have been well-documented. Extensive changes were brought about in the Colorado River ecosystem by the construction of the Glen Canyon Dam. Most of these alterations negatively affected the functioning of the system and the native aquatic species of the river. The reduced supply and transport of
First, the use of hydro energy resource, which is still debatable if it’s renewable or nonrenewable, cannot always be suitable for flat or dry regions and in areas where natural disasters occur. So counties with natural disasters or regions that are not suited is most likely not going to have a hydropower, as mentioned in (Marmulla, 2001, p. 55), dams are unnatural effecting species like fish causing migrations because of habitat loss. This can lead to extinction of species, affecting many ecosystems, since the fish starts to migrate to different areas changing the population balance. For example, Nicola, Elvira,
“The Three Gorges Dam will be the largest hydropower station and dam in the world, with a 1.2 mile stretch of concrete and a 370 mile-long reservoir and 525 feet deep.” To put that into understandable dimensions it will be the length of the Golden Gate Bridge, and twice as tall. “The reservoir created by the backflow of the dam will extend 360 miles up river to Chongqing, a distance equal to nearly half the length of California.” So what is the point of this monstrosity? The major prospective benefits will be power generation, flood control, and increased navigability of the Yangtze River. Many people debate whether these attributes will actually be as beneficial as builders expect. The drawbacks of the dam are its flood plain and the effects of the flood plain, environmental damage, resettlement, historical and cultural loss, and the ideas of speculators about whether or not some of the dam’s abilities are true.
The Grand Coulee Dam, located in Eastern Washington, was one of controversy, risk, and a point of no return. While the water captured made the desert area blossom in agriculture and it powered some large cities, it created a sense of accomplishment, that humans can control Mother Nature. While many people were very excited for this new construction – which gives power and resources - at the time, some thought it should not be allowed, they are not proud of containing the Columbia River. In this analysis, I am going to focus on the economic and social effects that the Grand Coulee Dam created in its build.
Hetch-Hetchy Valley was first discovered in 1871 by John Muir. Muir referred to this valley to Yosemite Valley because of its glamorous views. The name of this valley is derived from Miwok word hatchhatchie, meaning edible grass (tchistory). Hetchy-Hetch was used shortly after as a reservoir and water system for
The Dam On The River Dilyodh Brar The Grand Coulee Dam(G.C.D) changed Kettle Falls forever. Kettle Falls was a peaceful river where Native Americans fished every year. It is said that around 3,000 fish were fished every year. Then in 1933, everything changed when the Grand Coulee Dam started construction and finished on June 1, 1942, that is almost a decade. I feel like it is good that we built the Grand Coulee Dam. The Dam has great effects that have benefitted Washington. Two of them are the jobs people got in the Great Depression and Irrigation we got.
Dam projects can serve many purposes. They compensate for varying amounts of water that nature may send down a river at a given time, or they may serve as a resource to generate hydropower for the local population. The construction of these complicated feats of engineering is an expensive, time consuming task. For whatever reason a dam is built, it will almost always pay for itself in the energy it produces or
Based on the events that lead to the devastating floods in Queensland and the eventual case that was brought against the engineers of the dam, there have been views from both sides of the divide as to whether or not the actions taken by the engineers were actually ethical or otherwise. We have explored this avenue and have found that both sides of the divide have good reasons to justify their actions. Firstly, we shall explore the avenue that the engineers decisions were appropriate and ethical. It can be said that the engineers did employ act utilitarianism in their decisions and actions, hence causing these decisions to be ethically correct. Act utilitarianism is essentially doing the right thing, which would benefit the majority of
In 1992, The Elwha River Ecosystem and Fisheries Restoration Act of 1992 authorized the US Federal Government to acquire the hydroelectric power projects of Elwha Dam and Glines Canyon Dam, where are located on the Washington State for demolition for habitat restoration and decommissioning. The dam removals began in
The Bonneville Dam is located in the Columbia River between Oregon and Washington state. The Bonneville Dam began construction in 1934 and was opened by 1938. The Dam was built to generate a large amount of energy to the public, to control floods, and for irrigation. It was also constructed to improve navigation on the Columbia River. The construction of the Bonneville Dam caused negative effects to the Indian community that had centered their culture near the Columbia River. The facility administrator that was overseeing the construction of the dam was ordered to complete the dam taking any step necessary to do so. This included the decision on the disposal of personal property of the area which caused the destruction of forty Indian fishing
With human development, industrial pollution and other factors all contribute to the deteriorated condition of the river, which makes it difficult to determine the dams’ environmental impact in isolation. CITE That said, the current operations of the dam hamper and potentially prevent environmental improvement of the Colorado. In order to preserve some semblance of the Colorado ecosystem, man must restore the natural processes that created the ecosystem. The real question is how to do that, whether via dam decommission or a less extreme policy change.