Marc Reisners Coming Undammed :: Environmental Ecology Essays

Marc Reisners Coming Un jammedA block is a barrier constructed across a waterway to control the flow or raise the level of water. (Dictionary 1) They atomic number 18 put in place with much care and patience. A dike is very carefully planned out. Where they are going to be fixed? What type of soil it is going to be constructed in? When the plans are bony out, all(prenominal) detail is gone over with a fine tooth comb. Marc Reisner has compose an essay titled Coming Undammed, is an essay about him talking how he supports dam removals across the country. He has made some ideas about wherefore he sustains his opinion, some of which I agree with, but mainly I oppose.He starts off by talking about a dam that he had visited on the Elwha River, which has two dams within it. In the upper founder of the river, the Glines Canyon dam, and in the lower dam just called the Elwha. His first gratuity against the building of dams is how the silt in the ground surrounding this dam has b egun to dodging into the dam. Which he says will lead to big slurrying of the water and will eventually add millions of dollars to the cost of decommissioning. (Reisner 382) This may be the effect, but is only the case in this instance that he has come across. The ground of all another(prenominal) dams is not made up of the same material as every other dam in the nation. The dirt in New York doesnt have the same makeup as the dirt of the Hoover dam in Nevada. The next idea that he had for opposing dams are the erasure of fisheries where the dams are. He gave the example of how before the dams went in, the Elwha River churned out salmon as the Chesapeake verbalise did crabs. (Reisner 382) He also goes on to say that the fish were large and on that point were several types of fish with in the river. He concludes this point by proverb that when the dams were built up, it shut off the fish habitation within the river and trim down the fish numbers. I agree that with h im that the number of fish would be decreased with a dam being built. I think that the amount wouldnt be that high to cause a major problem.