Issue 2, 2003
From the journal:

Journal of Environmental Monitoring

Statistical analysis of the physico–chemical data on the coastal waters of Cochin

C. S. Padmanabha Iyer,*a   Manonmani Sindhu,a   Savita G. Kulkarni,b   Sanjeev S. Tambeb  and  Bhaskar D. Kulkarnib  

* Corresponding authors

a Centre for Marine Analytical Reference and Standards, Regional Research Laboratory, Thiruvananthapuram-695019, India
E-mail: iyer_csp@yahoo.com
Fax: 91-471-491712/490186

b National Chemical Laboratory, Pune, India

Abstract

Measurements of temperature, salinity, dissolved oxygen, nitrogen as ammonia, nitrate and nitrite, and phosphate along with chlorophyll were carried out at three stations on the coastal waters of Cochin, south west India, at two levels of the water column over a period of five years. The data set has been factorised using principal component analysis (PCA) for extracting linear relationships existing among a set of variables. A graphical display of the scores generated from the PCA was done by means of boxplots and biplots, which helped in the interpretation of the data. The major factors conditioning the system are related to the input of fresh water from the estuary of the Periyar river and the high organic load of the bottom sediment in the coastal area which results in a reducing environment, as reflected in the parameters of dissolved oxygen, ammoniacal-nitrogen and nitrite-nitrogen. Another factor which contributes to the variation in the system is related to the unloading activity in the port area. The present approach presents a logical way to interpret the complex data of the physico–chemical measurements.

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Article information

DOI
https://doi.org/10.1039/B209219K
Article type
Paper
Submitted
19 Sep 2002
Accepted
29 Jan 2003
First published
13 Feb 2003

J. Environ. Monit., 2003,5, 324-327

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Statistical analysis of the physico–chemical data on the coastal waters of Cochin

C. S. P. Iyer, M. Sindhu, S. G. Kulkarni, S. S. Tambe and B. D. Kulkarni, J. Environ. Monit., 2003, 5, 324 DOI: 10.1039/B209219K

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