The Elwha River ( Duda )

Finally, the Elwha dam was removed in 2012 again for similar reasons as the previous dams. An additional reason for the Elwha removal was the dam’s dangerous materials, PCBs and asbestos [3], polluting the surrounding area, the cost to remove and rebuild the dangerous materials was astronomical compared to the economic and environmental benefits of removing it. The dam was drained in a slow controlled fashion similar to Glines Canyon, and the original flow channels were even restored. This resulted in salmon population restoration, and more biodiversity in the river system that spread to the

: Larchwood Lake may not ever be the same again. The story about Larchwood Lake is not that uncommon. Without doing extensive research into possible things that could occur by lowering the lake level, the Larchwood Lake Homeowner’s Association destroyed the very thing they were trying to protect. Carelessness and poor planning are not the only root causes however. There are a number of reasons that led to the degradation of Larchwood Lake that happen to relate to more macro level environmental issues. Those reasons are poorly designed environmental policy created by the E.P.A., poor understanding of lake ecology by the managers of the land, and false confidence in poorly planned ideas. By looking at how these factors contributed to the degradation of the lake, hopefully we will be able to make more ecological sound decisions in the future.

The hydroelectric dam provides low cost power to numerous farmsteads and small towns of the expanded region. The lake has also provided for some of the fines walleye and salmon fishing within North Dakota.

Along this journey created by nature, the river interacts with man’s influence to encapsulate the full geographic experience of this region. The succession of dams along the river’s path is a major contribution to how man has decided to mesh with the river. The dams have created reservoirs for water supplies, harnessed energy to provide electric power to the southwestern region, and controlled flooding. Flood control was the main concern at the time between the years 1905 and 1907 when large floods broke through the irrigation gates and destroyed crops in California. The flooding was so large it actually created a 450 square mile sea, named the Salton Sea. As a result of this major disaster, ideas were formulated to

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.

Dams are harming salmon in so many ways. They’re taking away their habitat. The salmon’s access of the rivers are suddenly gone. In the Northwest, a large portion of dollars are spent in a year to fix all the damage to the salmon, caused by the dams on the Snake and Columbia rivers. For decades, there have been numerous debates about taking down these dams to help the fish, because they’re part of the endangered species act. There are biologists that notice how some salmon are trying to survive in rivers located in the Northwest that have been changed by dams. These fish are simply delaying migration back to the sea, growing larger in order to survive their trip back to the Pacific Ocean, and going back to their birth streams at higher rates than ever. All these salmon could be saving themselves instead of people spending billions of dollars. The consequences of this could be very important. The recovery of salmon

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

Exercise Lab 1. How much does temperature vary in large and small aquatic environments? Lab 2. What determines the water clarity of lakes, rivers and oceans? Lab 3. Where does the phosphorus go? Lab 4. How does human activity in watersheds affect the quality of lakes and rivers? Lab 5. Are the Great Lakes being influenced by the global greenhouse effect? Lab 6. How is the flow of the Red Cedar River influenced by the weather? Lab 7. What is the relationship between flow and turbidity in the Red Cedar River? Page 2 4 6 8 12 15 18

     The Klamath Lake, along with other various rivers, lakes and canals that surround it, are the basis for almost 500 species of wildlife in southern Oregon and parts of northern California. It also serves as the most important factor in a farmer’s livelihood; their irrigation. The basis for the water crisis that is going to today in this region is that the current water levels and somewhat water quality are diminishing and reeking havoc on the area’s

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 addition, farmland has been destroyed because of the floods and the decrease in delta sediment. The dam has reduced downstream nutrients and sediment flow. And has seriously impacted neighboring river and seacoast ecosystems.

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.