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Tide dependent seasonal changes in water quality and assimilative capacity of anthropogenically influenced Mormugao harbour water

DRS at CSIR-National Institute of Oceanography

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Title Tide dependent seasonal changes in water quality and assimilative capacity of anthropogenically influenced Mormugao harbour water
 
Creator Shirodkar, P.V.
Deepthi, M.
Vethamony, P.
Mesquita, A.M.
Pradhan, U.K.
Babu, M.T.
Verlecar, X.N.
Haldankar, S.R.
 
Subject water quality
tides
seasonal variations
mathematical models
 
Description Water quality data from Mormugao harbour area at the mouth of Zuari estuary in Goa have been obtained over two tidal cycles monthly for the year 2003 to 2004. R-mode factor analyses of the data indicated strong positive loadings of coliforms, nitrogenous substances, PHc and some heavy metals during post-monsoon, suggesting their dominance and significant increase relative to other seasons. Water quality index (WQI) studies showed overall index of pollution (OIP) values of 1.41 to 3.52, categorizing the harbour water as slightly polluted during pre-monsoon. During post-monsoon, the OIP values of 1.75 to 5.4 categorized the harbour water as polluted water, while it was acceptable quality water during the monsoon, with OIP values of 1.13 to 1.79. The higher chlorophyll a (1.4-19 mgm sup(–3) mu g/l) and primary productivity (4.8-14.8 mg/l) of the monsoon was followed by that of the post-monsoon season, with the least during pre-monsoon. Modeling studies using Ecolab module of MIKE 21 suggested slightly higher assimilative capacity for harbour water during the pre-monsoon relative to post-monsoon, which showed a reduction in assimilative capacity.
 
Date 2012-10-15T09:20:04Z
2012-10-15T09:20:04Z
2012
 
Type Journal Article
 
Identifier Indian Journal of Geo-Marine Sciences, vol.41(4); 2012; 314-330
http://drs.nio.org/drs/handle/2264/4181
 
Language en
 
Rights © IJMS/NISCAIR 2010. CC Attribution 3.0 License
 
Publisher CSIR-NISCAIR