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Mudflats in lower middle estuary as a favorable location for concentration of metals, west coast of India

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Title Mudflats in lower middle estuary as a favorable location for concentration of metals, west coast of India
 
Creator Siraswar, Ratnaprabha
Nayak, G. N.
 
Subject Madflats
Metal deposition
Manovi Estuary
 
Description 372-385
Present study was an attempt to understand
hydrodynamic conditions and the main factors regulating the distribution of
metals in mudflats in the recent past along Mandovi Estuary. Sediment cores of
20 cm length were collected from three mudflats viz. near the mouth, lower
middle and upper middle regions representing monsoon season from Mandovi
Estuary. Cores were sub sampled at every 2 cm interval and analyzed for sand,
silt, clay, organic carbon and selected metals. Sand percentage is the highest
in the mudflat situated near the mouth (Betim) and finer sediments are higher
in the lower (Karyabhat) and upper (Ribander) middle regions of the estuary.
Organic matter associated more with finer sediment fractions at Karyabhat and
Ribander (2.19% to 2.37%) mudflat cores as compared to Betim (0.13%). The
sediments of Betim fall in the class I to IV, whereas sediments of two cores
collected from middle estuarine region fall largely in class III. Sediment
samples were analyzed for selected metals. Fe is highest in Ribander mudflat as
compared to other cores. Cr, Co, Cu and Pb distribution agrees largely with the
pattern of Fe in all the cores. Distribution of Cu and Pb also agrees with that
of Mn. Zn and Ni follow the pattern of Co agreeing Fe distribution pattern.
Concentration of Fe and Mn along with Ni, Zn, Cr, Pb and Cu are higher in
Karyabhat.
 
Date 2011-07-19T04:45:23Z
2011-07-19T04:45:23Z
2011-06
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/12427
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(3) [June 2011]