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Lake Tarpon’s Water Quality: Change Over An Eight Year Span

1041 words - 5 pages

IV. Introduction: The purpose of this research is to determine whether there has been a change in the overall water quality of the Lake Tarpon Basin, and if so, whether the quality has improved or worsened. The variables that will determine whether the quality has changed are: nutrients (phosphates and nitrates) and dissolved oxygen (DO). The expected changes are lower dissolved oxygen levels (from the already low levels), higher nitrogen levels (from the already high nitrogen levels), and the state qualifications still are not met for nutrients and dissolved oxygen (Levy, Flock, Burnes, Myers, Weed, River 2010). This topic relates to environmental management because the changes in water ...view middle of the document...

The LaMotte instructions for testing the dissolved oxygen level are: fill the provided test tube until it is overflowing with the sample, add 2 Dissolved Oxygen TesTabs, cap the tube and invert until the TesTabs are dissolved, wait 5 minutes, then compare the color of the sample to the Dissolved Oxygen Color Chart, recording in parts per million Dissolved Oxygen. The results will be averaged and then compared to the data from the 2003 to 2010 data recorded by the Ambient Monitoring Program (Levy, Flock, Burnes, Myers, Weed, Rivera 2010).
VI. Results and Analysis: The chi-squared analysis (x2 = ∑ (o-e)2/e) for dissolved oxygen, with o equaling the average observed dissolved oxygen value, 5 parts per million dissolved oxygen, and e equaling the dissolved oxygen from the 2010 values, 3 parts per million dissolved oxygen, results in x2 equaling 1.333 and probability equaling 0.99. The chi-squared analysis for nitrates with o equaling the average observed nitrates value, 3.125 parts per million nitrates, and e equaling the expected nitrates from the 2010 values, 10 parts per million nitrates, results in x2 equaling 4.72 and probability equaling 0.70. The chi-squared analysis for phosphates with o equality the average observed phosphates values, 1.125 parts per million phosphates, and e equaling the expected phosphates values, 0.1 parts per million phosphates, results in x2 equaling 10.5 and a probability of 0.1.
Table 1-1
Date Water Sample Was Collected Dissolved Oxygen in parts per million (ppm) Dissolved Oxygen Nitrates in parts per million (ppm) Nitrate Phosphates in parts per million (ppm) Phosphate
January 18, 2014 4 ppm 5 ppm 2 ppm
January 27, 2014 4 ppm 3 ppm 0.5 ppm
February 18, 2014 4 ppm 3 ppm 0.5 ppm
February 19, 2014 4 ppm 3 ppm 0.5 ppm
March 20, 2014 4 ppm 3 ppm 2 ppm
March 20, 2014 8 ppm 3 ppm 2 ppm
March 20, 2014 8 ppm 2 ppm 1 ppm
March 23, 2014 4 ppm 3 ppm 0.5...

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