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Gulf of mexico dead zone essay
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This spring, record breaking floodwaters along the Mississippi River caused massive damage in nine states, totaling over $25 billion dollars in damage (Watts, 2011). In most areas the floodwaters have receded, however there is concern that even a little rain could cause more flooding due to the already saturated land. As cities and towns are beginning the restoration process, one thing caused by the flooding waters cannot be restored. Pollutants’ such as nitrogen from fertilizer, due to this area being primarily composed of farming land, is making its way toward the Gulf of Mexico. Every year pollutants traveling in the Mississippi River enter the Gulf and contribute to the Coastal Dead Zone; however, this year the Dead Zone in the Gulf of Mexico is expected to be the largest on record (University of Michigan, 2011; NOAA, 2011).
With record breaking flood levels, floodplains are unable to properly filter pollutants, like fertilizer, from entering into streams and rivers. Along the Mississippi River most of the land is farmland, and because there are more fields in this watershed area, excess fertilizer loaded with nitrogen makes its way into rivers and streams. This happens when water travels through the watershed areas and gathers in a floodplain. When this area is flooded, the water comes up on shore, and when the waters recede, the pollutants and sediment from soil erosion flow into the river. Once the nitrogen from the fertilizer enters the river, it stimulates plant growth. When there is too much plant growth, a river can be a very unhealthy place. Plants that grow and thrive, like algae, are usually in the upper levels of the river. Because an increase in algae growth occurs with the increase of nitrogen levels, it chang...
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University of Michigan (2011, June 14). Record Gulf of Mexico 'dead zone' predicted due to Mississippi River flooding. ScienceDaily. Retrieved from http://www.sciencedaily.com-/releases/2011/06/110615091057.htm.
University of Virginia (2008, May 18). Excessive reactive nitrogen in environment alarms environmental scientists. ScienceDaily. Retrieved from http://www.sciencedaily.com¬ /releases/2008/05/080515145419.htm.
Watts, A. (2011, July 6). Widespread flood threat to continue through summer. NOAA-NWS. Retrieved from http://www.worldweatherpost.com/2011/07/06/noaa-%E2%80%93-nws- on-continuing-midwest-flood-risks/.
World Resources Institute. (2011, January 20). New web-based map tracks marine “dead zones” worldwide. Retrieved from http://www.wri.org/press/2011/01/new-web-based-map- tracks-marine-dead-zones-worldwide.
Hydrosphere of the Mississippi River A Case Study of * River management * People interfering in the hydrosphere * A flood management scheme River Basin / Catchment area The source of the river is the eastern side of the Rocky Mountains and the Appalachian Mountains to the north. There are many hundreds of tributaries including the Red River, Missouri river and the river Ohio. The mountains form the river's watershed. From Minneapolis the river flows South-East into Iowa where it flows south as far as Davenport. At Davenport it is joined by more small tributaries.
The one feature common to the Hoover Dam, The Mississippi river and the three gorges dam is that they all tried to control nature’s swings, specifically in the form of flooding. Before the Hoover dam was built, the Colorado river “used to flood spectacularly…but after 1900 the Colorado provoked a vehement response” (Pg 177). The response was simple, but large. The U.S. built several large dams, including the Hoover dam, on the Colorado to decrease its flooding and increase power and irrigation. Unfortunately, just as human control of the Colorado’s flooding increased, its organisms and habitats were detrimentally influenced, and the water became more and more salinated.
Currently, the United State’s Gulf of Mexico experiences an annual, seasonal “dead zone” as a result of hypoxia. Hypoxia is a low level of dissolved oxygen (<2mg/L) in an area of water. Hypoxia is typically temporary and seasonal, but the low oxygen levels can be devastating to aquatic organisms. Hypoxia occurs in many oceanic waters worldwide, but there is a growing area of concern in our Gulf of Mexico coast. Hypoxia is largely caused by nitrogen fertilizer application for agriculture, with heavy concentrations coming from the Midwestern US. Nitrogen mobilizes as nitrate, and is transported via surface water runoff. The runoff enters tile-drain supported ditches, enters streams and joins the Mississippi river, eventually reaching the gulf. Nitrate mobilization is a problem for human health, and ag. runoff is also often attributed to the contamination of surface and well-water sources in rural areas. High levels of nitrates restrict the ability of red blood cells to carry oxygen. This can harm humans, and is the major cause of infant methemoglobinemia, or “blue baby syndrome”. The safe drinking level standard is 10mg/L.
In the year 1919, on January 15th, Boston experienced a strange disaster. This said disaster is now known as the Boston Molasses Flood. The disaster occurred when an above-ground tank filled with 26 million pounds of molasses burst and unleashed a wave of molasses from eight to fifty feet high and moving at 35 miles per hour killed people and destroyed buildings in the surrounding neighborhood. After the wave of molasses had slowed down, it settled at two to three feet in depth. Acting like quicksand, the molasses effectively suffocated people and animals. The massive cleanup of the molasses took over 87,000 man-hours. This is white textThe negative impact of the flood was tremendous as it killed 21 people, injured 150, lead to a civil lawsuit representing 119 families, caused great destruction to the buildings and stores, polluted the water, and led to a costly cleanup. Nevertheless, the resulting positive impacts of holding businesses accountable through civil lawsuits, creation of state licenses for engineering and architecture, advancing government regulations over big
Technology's Impact on the Upper Mississippi River. Since the days of Lewis and Clark, men have dreamed of harnessing the "Father of Waters" in the interests of commerce and development. The long struggle which ensued required incredible ingenuity and determination on the part of engineers as well as enormous capital investment. The Mississippi River Commission, established in 1897, was the first federal program designed specifically to meet these requirements, and early systems, instituted by the Army Corps of Engineers, saw much success.
Most of the destructions from the events of August 29th 2005, when Katrina Hit the City Of New Orleans, were not only caused by the storm itself; but also, by failure of the engineering of the levee system protecting the entire infrastructure of the city. The years of poor decision making and avoidance of the levee system led to one of the most catastrophic events in the history of the United States. Throughout our research, we have identified three key players in charge of the levee system design, construction and maintenance. These three organizations are the Unites States Corps of Engineers, the New Orleans Levee District and the Louisiana Department of Transportation. The consequences of the hurricane showed the organizations negligence in the design, construction and maintenance of the protective walls. Later independent sresearch showed that more than 50 levees and food walls failed during the passage of the hurricane. This failure caused the flooding of most of New Orleans and all of ST. Bernard Parish. The Unites States Corps of Engineers had been in charge of the of the levee system and flood walls construction since the 1936 flood act. According to the law, the Louisiana Department of Transportation is in charge to inspect the overall design and engineering practices implemented in the construction of the system. Once the levee systems were finished, they were handed over to the New Orleans Levee District for regular maintenance and periodically inspections. The uncoordinated actions of these three agencies resulted in the complete failure of a system that was supposed to protect the people of New Orleans. The evidence is clear that this catastrophic event did not happened by chance. The uncoordinated response of these...
The Great Mississippi Flood of 1927 was one of the most destructive in the history of the United States, proving that the levee only policy was a failure and the limits of human control over the river. The beginning of the flood, from the initial crevasse, poured out “468,000 second-feet onto the Delta that triple the volume of a flooding Colorado, more than double a flooding Niagara Falls and the entire upper Mississippi ever carried” (pg 203). The flood of 1927 “shifted perceptions of the role and responsibility of the federal government… shattered the myth of a quasi-feudal bond between Delta blacks and the southern aristocracy...accelerated the great migration of blacks north. And it altered both southern and national politics....” (pg 422). America is a product of the flood of 1927 in shaping the political, social, and economic structure. With each reoccurring disaster, America, in that region, continues to face the same issues regarding social conditions and poor working conditions that failed to be addressed.
The Chesapeake Bay plays host to an astonishing amount of plant and animal life, providing much of our fish intake for species that aren’t being overfished. For the species that are being overdrawn, the Chesapeake Bay Foundation is working to restore the populations, and it’s going well thus far. Another theme that is endangering the marine life populations as well as the health of the human population is the massive amount of polluti...
The Cumberland and Cumberland River basin experienced a 36 hour rainfall that produced flooding in Nashville and its greater area (After Action Report, II). The 2010 two day storm was believed to be greater than a 100 year event. Storm activity began on May 1st and 2nd which created a large scale flash flood along the Cumberland and Lower Tennessee rivers, and within its tributaries. Historically the Cumberland River basin has received great amounts of precipitation and has experienced extreme rainfall before, making it prone to severe flooding (After Action Report, I). Some of the historic floods that have affected the Cumberland River are the December 1926, January 1927, January 1937 and March 1975 floods, which produced a maximum flood height in much of the river. Before the May 2010 flood, the Cumberland River reached a flood stage of 45.26 feet during the May 1987 flood which was a result of a series of flooding events that took place during an extensive amount of time (After Action Report, 4). The 2010 flood which affected much of Nashville acted more like a flash flood, which produced record breaking rainfall for much of the area. According to the Quantitative Precipitation Forecast (QPF) on April 30th rainfall totaled 7.8 inches across central Tennessee. The report also states that there was a widespread of rainfall equaling to 2 to 6 inch in total, over southeastern US stretching to Illinois, Indiana and Ohio. Rainfall for parts of western Tennessee and Kentucky totaled 3 to 4 inches with a high of 4.65 inches (After Action Report, III). As it is stated by the report areas around Nashville received more than 13 inches of rain in a span of 36 hours, which doubled the record set by the September 1979 flood event. At th...
When it floods sediments can affect the land by losing nutrients in the soil and it can also affect the clarity of
Memphis Tennessee floodings are awful events, but some have left their mark in history, and have impacted society making many people search for solutions. Historical flooding events have dated back beyond 1927, but Memphis’s first calamitous flood was in 1927, then in 2011, but between those dates there have been street floods that happen without interacting with the river. Many important aspects of everyday life are lost during floods such as lives, homes, and money. People have been searching for solutions to prevent floods, and ideas that are executed well could easily become an ideal panacea. Memphis is where I have been raised and experienced several floods, which gives me a much stronger feeling about the history, impacts, and techniques to stop floods.
In a passage from his book, Rising Tide: The Great Mississippi Flood of 1927 and How It Changed America, author John M. Barry makes an attempt use different rhetorical techniques to transmit his purpose. While to most, the Mississippi River is only some brown water in the middle of the state of Mississippi, to author John M. Barry, the lower Mississippi is an extremely complex and turbulent river. John M. Barry builds his ethos, uses elevated diction, several forms of figurative language, and different styles of syntax and sentence structure to communicate his fascination with the Mississippi River to a possible audience of students, teachers, and scientists.
The Mississippi River Flood of 1927 was one of the most devastating floods in the country. The flood had a major effect on the economy. Because of the flood, thousands of acres of agricultural land and animals were lost, many homes were destroyed, and people were displaced.
Rivers have been extremely important to the history of the world. They have shaped mountains, valleys, and even cultures. Rivers are extremely important to the individuals who live in the areas around them. Native Americans, colonists, and us today use rivers in some way or another. And one of the biggest rivers in American history is of course the Mississippi River. At 2,340 miles long the Mississippi river is the second longest river in the United States. It flows through 10 states - Minnesota, Wisconsin, Illinois, Iowa, Kentucky, Tennessee, Missouri, Arkansas, Louisiana, and, of course, Mississippi. At the end it empties into the Gulf of Mexico.
...eochemical cycles. By increasing the amount of crops that are removed from the soil and the subsequent soil erosion, phosphorus levels in the soil have dropped. The phosphorus lost from the soils travels to aquatic ecosystems which then can cause massive algal blooms. The increased use of nitrogen based fertilizers has also altered that cycle. The fertilizers add high levels of nitrates to the soil, and in natural ecosystems, nitrates will undergo denitrification and be returned as atmospheric nitrogen. This is not the case because the nitrate levels exceed the levels of denitrification that bacteria can handle. Additionally, much of the denitrifying bacteria is found in marshes and wetlands, which are currently being destroyed at incredible rates. In some areas, the excess nitrate has made it into the ground water system and contaminated the drinking water system.