Authors: A Yudhistra Kumar M Vikram Reddy
Publish Date: 2008/10/23
Volume: 157, Issue: 1-4, Pages: 223-234
Abstract
The seasonal effects of untreated and treated municipal sewage on the nutrients—nitrate NO3 phosphate PO4 sulphate SO4 and the biochemical oxygen demand BOD chemical oxygen demand COD and dissolved oxygen DO of the receiving urban canal the Buckingham canal at Kalpakkam Tamil Nadu India was monitored monthly during pre monsoon—2005 to postmonsoon—2006 The NO3 PO4 and SO4 contents were higher in the downstream than that of the upstream of the outfall points of treated as well as untreated sewage of the canal The NO3 and PO4 contents were higher during summer than that of monsoon however the SO4 was higher during winter and lower during summer in the canal water The BOD and COD were lower and DO was higher at the upstream than that of downstream of the canal The concentrations of BOD and COD were higher during summer season which decreased during monsoon season while the DO decreased during the summer season and increased in monsoon season in the canal water Cluster analysis applied to the six sampling points of the canal has grouped them based on the water quality similarities
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