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Temporal and spatial variability of trace metals in suspended matter of the Mandovi estuary, central west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Temporal and spatial variability of trace metals in suspended matter of the Mandovi estuary, central west coast of India
 
Creator Shynu, R.
Rao, V.P.
Kessarkar, P.M.
Rao, T.G.
 
Subject trace metals
suspended particulate matter
spatial variations
temporal variations
 
Description Studies on the suspended particulate matter (SPM) in the Mandovi estuary, western India indicate that during the monsoon and pre-monsoon, the SPM increases, and the major and trace metals decrease from stations in the upstream to downstream of the estuary. SPM is consistently low at all stations during the post-monsoon. Trace metals (Cu, Ni, Zn, Cr, and Pb) show strong inter-relationships. They correlate well with Fe and Mn only during the monsoon. The concentrations of Cr, Cu, and Pb are high during the post-monsoon. Enrichment factors and I sub(geo) values of metals indicate that Mn shows significant to strong pollution in all seasons, while Cr, Ni, and Zn during monsoon, and Cr during the post-monsoon show moderate pollution. SPM is controlled by the turbidity maximum, while major and trace metals are governed seasonally by a combination of river discharge, resuspension, spillage of Fe-Mn particulates, and anthropogenic contamination. Incursion of saline waters deep into the river channel during the dry season facilitates aggregation and settling of particulate-borne pollutants close to the discharge area, thereby keeping the estuarine waters free from major contamination.
 
Date 2012-02-03T07:03:08Z
2012-02-03T07:03:08Z
2012
 
Type Journal Article
 
Identifier Environmental Earth Sciences, vol.65; 2012; 725-739
http://drs.nio.org/drs/handle/2264/4011
 
Language en
 
Rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2011] Springer-Verlag.
 
Publisher Springer