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BOD-DO modeling and water quality analysis of a waste water outfall off Kochi, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title BOD-DO modeling and water quality analysis of a waste water outfall off Kochi, west coast of India
 
Creator Babu, M.T.
Das, V.K.
Vethamony, P.
 
Subject water quality
offshore
outfalls
biological oxygen demand
effluents
backwaters
waste water
 
Description Water quality scenarios around an offshore outfall off Kochi were simulated using MIKE21 water quality model, assuming a high Biochemical Oxygen Demand (BOD=50 mgl sup(-1)) effluent discharge. The discharge is introduced into the model through an outfall located at a distance of 6.8 km from the shore at a depth of 10 m. Three scenarios were simulated with different discharge rates such as 2, 5 and 10 m sup(3) s sup(-1), with BOD load of 8640, 21,600 and 43,200 kg day sup(-1) respectively. Model simulations were carried out to estimate the assimilation capacity of the waters off Kochi for the three discharge rates. The results show that for 10 m sup(3) s sup(-1) effluent discharge, the initial BOD of 50 mg l sup(-1) reduced to 3.33 mg l sup(-1) at the outfall after 48 h. High BOD values were confined to an elliptical area of approx 8 km sup(2) around the outfall. Based on this, the assimilative capacity of the waters off Kochi in terms of BOD can be estimated as 38,000 kg day sup(-1). It is suggested that offshore waters could be used as a feasible alternative to the Kochi backwaters for the disposal of treated effluent
 
Date 2008-02-12T04:59:54Z
2008-02-12T04:59:54Z
2006
 
Type Journal Article
 
Identifier Environment international, Vol.32; 165-173p.
http://drs.nio.org/drs/handle/2264/852
 
Language en
 
Rights Copyright [2006]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Elsevier