Assessment of seasonal effects of municipal sewage pollution on the water quality of an urban canal-a case study of the Buckingham canal at Kalpakkam (India): NO3, PO4, SO4, BOD, COD and DO

作者：Kumar A Yudhistra; Reddy M Vikram^*

来源：Environmental Monitoring and Assessment, 2009, 157(1-4): 223-234.

DOI：10.1007/s10661-008-0530-0

• Treated and untreated sewage
• NO3
• PO4 SO4
• BOD
• COD
• DO
• Cluster analysis

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 post-monsoon-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.

• 出版日期2009-10