International Journal of Environmental Sciences

Volume 2 Issue 3 2012           Pages:1688- 1698

Assimilative and healing capacity of coastal waters against the sewage and effluents released along the coast of Visakhapatnam industrial belt

Author Information:

Srinivasa Rao S and Srinivasa Rajamani N - Research Scholar, Department of Environmental Sciences, Andhra University, Visakhapatnam

Reddi E.U.B - Senior Professor, Department of Environmental Sciences, Andhra University, Visakhapatnam

ABSTRACT
Owing to increased anthropological activities, the coastal zone is receiving a vast quantity of sewage waste and industrial effluents. But conflicting views on the impact of these wastes on coastal waters prompted us to take up this study.  Four sampling points along the coast were identified and analyzed the collected water samples for nutrients and chlorophyll-a during pre- and post-monsoon seasons. The results indicated that the study area was of mesotrophic type and the coastal water was well oxygenated with mean DO of 5.2mg/lit and was biologically productive at primary level with ambient levels of nutrients excepting slight higher concentrations of phosphate-phosphorous and total nitrogen as 19.0µgm/lit and 502.8µgm/lit respectively. Further, toxicological studies (bio-assay tests) of discharged effluents and coastal water samples were conducted on selective standard test organisms and compared with the control samples. They revealed that the impact of the discharges on the coastal environment was insignificant.

Keywords : Industrial Impact, Coastal Water Quality, Nutrients, Chlorophyll-a, Toxicity Factor, Mesotrophic.

DOI: 10.6088/ijes.00202030053


© 2012 Copyright Srinivasa Rao S et al, licensee IPA.This is an open access article distributed under the Creative Commons Attribution License (2.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The electronic version of the article can be downloaded below.

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