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    Initial Correlations Among The Levels Of Various Nutrient Species In Water From Nairobi Dam, Kenya

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    Date
    2011
    Author
    Muigai, P. G
    Shiundu, P. M
    Mwaura, F. B
    Kamau, G. N
    Type
    Article
    Language
    en
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    Abstract
    Research work on Nairobi Dam, Kenya, and its tributaries has revealed that during the first trial sampling period, the R2 value, i.e., the square of linear regression correlation coefficient was poor between the nutrients: (PO4 3- + Hydrolysable) – Phosphorous and nitrate-nitrogen (0.0133). But excellent or fairly good correlation was obtained between other pairs of bulk inorganic nutrients in the same groups or blocks of the Periodic Table, or having the same physiological or environmental roles. The results for correlation in descending order are as follows: K & Na (0.9782), Ca & Mg (0.9468), Mn & Fe (0.6357) and Zn & Cu (0.5373). On the other hand, the second sampling results showed that the R2 value between ‘Total’ phosphorous and 'Total' Nitrogen ((Total Kjeldahl + nitrate) - nitrogen) (0.8587) was far much higher than that involving phosphorous and nitratenitrogen for the first sampling, while that between the other nutrient pairs remained fairly satisfactory as follows:- K & Na (0.9875), Ca & Mg (0.6047), Mn & Fe (0.5147) and Zn & Cu (0.554). This was as expected for elements in the same group or those close to one another like copper and zinc, thus indicating possibility of a common source for most of these inorganic nutrients, such as the domestic sewage effluents. The correlation data for nitrogen and phosphorus demonstrated the fact that it is the total amount of these elements which matters when dealing with eutrophication.
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    http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/42843
    Citation
    P. G. Muigai, P. M. Shiundu, F. B. Mwaura and G. N. Kamau (2011). Initial Correlations Among The Levels Of Various Nutrient Species In Water From Nairobi Dam, Kenya. International Journal of BioChemiPhysics, Vol. 19, July 2011
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