Environmental Impacts of Dams and Reservoirs

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 [1]. Dams were originally constructed to provide water to towns and establishes energy sources for mills and later hydroelectric plants. Because these dams were constructed decades ago, they’re reaching a critical point of obsoleteness where they cause more harm than good. Dam removal is increasingly popular across the country to address the ecological problems including habitat loss and sedimentation, despite potential for downstream harm, removing dams is more environmentally and economically cost effective than upgrading them. The Marmot, Glines Canyon, and Elwha river dam removal projects each highlight different challenges of dam removal, but overall

Dams built for flood control and water catchment along the rivers leading to these coasts inhibit the transport of large grained

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

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.

In the ¨River Restoration Project Offers a Sprinkling of Hope¨, Ron Jacobsma, general manager of the Friant Water Authority, said “We hope to get double duty out of that water by taking it the long way around.¨ As Jacobsma is a general manager of the Friant water Authority, this offers us his experience, his ideas and his thoughts of how we can have hope for the project. President Barack Obama signed the Omnibus Public Lands Bill in March, the agreement turned into federal law when he signed it. The parties had been working on the restoration plan for more than two years laying the groundwork for the physical changes to come. When the president signed it, it made them get the approval which he supported for them to continue the process. The credibility of the author right has now been believable because he provided us with the ethics of President Obama and Jacobsma. The river will not necessarily end up to its full, natural path along its entire length. Too much has changed in the decades since the dams construction. They would use canals along some stretches to carry the water short distances and to ferry the salmon upstream. This is showing us logos with facts and information it offers an explanation on how to solve one of the problems with the plan. A professor named Peter Moyole, from UC Davis also had his opinion on the project. He said “We have never done anything on this scale”, but we were willing to try it and approve of the

But the effects that it will have on ecosystems could be catastrophic. The lack of protection on beavers’ home could possibly lead to extinction in these animals and the dams beavers’ create slow down the river's currents and make the water more habitual for many fish species. Which resurfaces the fact that all species depend on each other to create an ecosystem. The length of the rules in Minnesota’s fishing regulations to protect the fish, in the long run, will not protect the species that help fish thrive within an ecosystem

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

The Three Gorges Dam is an unfinished project which will be the largest dam ever constructed on the planet Earth. It is situated in China on the third largest river in the world – the Yangtze. The dam has been debated over since the 1919 and is still a hot topic of debate because of its many pros and cons. In 1994 construction began on the dam, and it is expected to be finished by the year 2009. The massive dimensions of the dam are mind boggling and its functions – if the dam actually works – are truly remarkable; however, with such a large structure also comes difficulties, sacrifices, and cynics. The goal of this essay is to lend an understanding of the dam itself, the prospective benefits of

When deciding whether of not to support the construction of a new dam, we have to use the process of cooperating, communicating, and thinking to come to a logical conclusion that is best for this world. Cooperating is important because it allows people to work together to come to a final decision by using everyones knowledge. Communication is also needed to tell others your opinion and to share the pros and cons of creating a dam. Lastly, thinking like a scientist is greatly needed. When making a decision like this, bias must be out of the opinions given and facts are needed because creating a dam can greatly affect the

-Growth in beaver populations meant more dams which had multiple beneficial effects on streams and rivers. Dams slow seasonal water runoff and help to maintain a healthy water supply. The pools created by dams also created good habitats for fish. More abundance of willows made great songbird habitat.

But overfishing - combined with a loss of habitat and the construction of dams in tributaries, which prevented spawning – has nearly exterminated the species, leading non-profit and government agencies to coordinate programs in hopes of restoring the numbers.

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.

Let’s put our focus on the ecological cons. The fish can’t go down the river all the way. In addition, it creates a lake which then creates too many nutrients. When too many nutrients build up (like algae) it causes species such as fish to

INTRODUCTION: Water assets building is growing massively today. Dams have the most vital part in using water assets. They were developed taxing year before increasing present data about hydrology and hydro mechanics. All through the historical backdrop of the world, dams have been utilized effectively as a part of gathering, putting away and overseeing water expected to manage human advancement. Dams have a lot of positive and negative impacts on the earth. Their advantages like controlling stream administration, subsequently forestalling surges, getting local and water system water from put away water and creating vitality from hydro control. While dam give noteworthy advantage to our general public, their effect on the encompassing incorporates resettlement and migration, financial effect, natural concerns, sedimentation issue, security angles and so on. Notwithstanding their vital social and natural advantages, it is vital to minimize the negative impacts of the hoover dam on the earth with respect to feasible advancement.

They include the dying of various animals and seldom fish species. The landscape around the dam could be damaged to a great extend due to the rise of the Yangtze water level. Drainage outlet could occur and therefore some of the surrounding land-scape will be flooded.