Reservoir and Sedimentation Assessment

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

In 1935 the Hoover Dam was completed forming Lake Mead, providing flood control, reservoir storage, power generation and regulates the downstream flow to the Lower Basin States. [footnoteRef:20] In 1963, the Glen Canyon Dam was completed forming Lake Powell, providing the Upper Basin States with enough reserve capacity to allow them to meet their annual obligation of 7.5 Million Acre Feet (MAF) to the Lower Basin States, allowing the Lower Basin States to use the allocation.[footnoteRef:21] As a consequence of the construction of the Hoover Dam and the Glen Canyon Dam, the Colorado?s flow often evaporated in Mexican sands close to the Delta.[footnoteRef:22] Around the 1970s, the Cienega de Santa Clara had shrunken by 500 acres. Nevertheless, due to the following wet decades, the Cienega was resuscitated to about 10% of its original acreage in the 80?s and 90?s.[footnoteRef:23] Currently, the Cienega is a 40,000 acre wetland that exists due to the return flows from the Mohawk Irrigation and Drainage District near Yuma, Arizona.[footnoteRef:24] This Cienega is the home of less than 100 members of the Cucapa tribe and is the habitat of several endangered fish and birds, including Desert Pupfish and Yuma Clapper Rail.[footnoteRef:25] [19: D.F.

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 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

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

For this paper water structures and infrastructures were selected as focus points because the longer we wait to fix issues with them, the more expensive it will get, in other words, we are in a race against time. Studying the past it is easy to see how water availability made population explode in an area such as Southern California, where savvy marketing and great politics made it happen. Particularly, for Los Angeles and for the purposes of public narrative, Marc Reisner’s Cadillac Desert does a great job at understanding and identifying the politics and key figures in getting water to Los Angeles. Great hydrologic structures were created using both manpower and water politics. It is important to state that there are connections between water, politics, environment, and geography when analyzing what the biggest problems involving water structures and infrastructures (Reisner.) We must think of water as both a socio-political issue and a natural resource, whose fate is molded by the understanding of its connectivity to itself, man-made structures, geography, environment, and society. The classes taken in this program have taught us ideals that in order to become a great water resource manager, one must master the political and scientific knowledge to make decisions that are prosperous for society and the environment. Furthermore, one must know the United States’ hydrological history in order to gain manipulation upon the system that makes it both thrive and deteriorate.

Until the early 1850's California's rivers flowed freely to the Pacific Ocean. The emergence of dams started with small earthen dams used to divert water for mining and irrigation purposes. The diverted water used for hydraulic mining would prove to be the beginning of a long era of environmental degradation of California's river ecosystems. With the turn of the century came a population boom and the rapid development of urban centers and an increased demand for water. With the end of the gold rush, agriculture quickly became the main player in California's economy. This too, raised the demand for water and dams were being built at a staggering pace. The introduction of huge hydropower dams proved to be the "nail in the coffin" for anadromous fish because little or no heed was paid to the impact of dams on the state's watersheds. Today California has over fourteen hundred dams responsible for

In 1923-1947 Arkansas Power and Light (AP&L) constructed several dams on two Arkansas lakes, Hamilton and Catherine. AP & L obtained “flood easements” on property adjoining the lakes. AP&L sold lake side property and kept the easement in force. These flood easements permitted AP&L to “clear of trees, brush, and other obstruction and to submerge by

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 2011 and finished in 2014. I wondering that why government decided to remove the dam and what happens in Elwha River after dam removal. In this paper, I write about the following topics: main purpose of the Elwha and Gliens Canyon dam, effects to the Elwha River as well as ecosystem after constructing dam, reasons of the dam removal, process of the dam removal, and effects after dam removal.

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

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.

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.