ESTUARINE OCEANOGRAPHY OF THE VEMBANAD LAKE PART III: THE REGION BETWEEN COCHIN AND THE 3 0 M DEPTH OFF PORTMOUTH


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Authors

  • C P Ramamirtham Central Marine Fisheries Research Institute, Cochin 682031
  • S Muthusamy Central Marine Fisheries Research Institute, Cochin 682031
  • L R Khambadkar Central Marine Fisheries Research Institute, Cochin 682031
  • A Nandakumar Central Marine Fisheries Research Institute, Cochin 682031
  • N P Kunhikrishnan Central Marine Fisheries Research Institute, Cochin 682031
  • A V S Murty Central Marine Fisheries Research Institute, Cochin 682031

Abstract

The time-distribution patterns of temperature, salinity and oxygen content
along the shipping channel from inside the port to a distance of about 15
km out into the Arabian sea during 1981-1983 are presented and discussed in this
third and last part of the estuarine oceanographic study of the Vembanad lake.
The distribution patterns show that hydrologically the nearshore region up to 12
or 15 km off Cochin is more or less identical to the adjacent coastal region,
without having any apparent influence of the lake, during the dry months January
to May. During the wet months, however, the discharge from the lake, characterized
by suspended sediments, spreads as a plume, over highly saline and cold
upwelled water, turning the region into an intermittent estuary. Though the end
of the plume can often be pinpointed around the 30in depthline, by a sharp
change of colour and filaments formed of floating objects of land and freshwater
origin, the presence of an actual plume front is doubtful because of the weak
surface convergence then occurring in a broad area off Cochin.

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Author Biographies

  • C P Ramamirtham, Central Marine Fisheries Research Institute, Cochin 682031
    Central Marine Fisheries Research Institute, Cochin 682031
  • S Muthusamy, Central Marine Fisheries Research Institute, Cochin 682031
    Central Marine Fisheries Research Institute, Cochin 682031
  • L R Khambadkar, Central Marine Fisheries Research Institute, Cochin 682031
    Central Marine Fisheries Research Institute, Cochin 682031
  • A Nandakumar, Central Marine Fisheries Research Institute, Cochin 682031
    Central Marine Fisheries Research Institute, Cochin 682031
  • N P Kunhikrishnan, Central Marine Fisheries Research Institute, Cochin 682031
    Central Marine Fisheries Research Institute, Cochin 682031
  • A V S Murty, Central Marine Fisheries Research Institute, Cochin 682031
    Central Marine Fisheries Research Institute, Cochin 682031

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Issue

Vol. 34 No. 4 (1987)

Section

Articles

License

The copyright of the articles published in Indian Journal of Fisheries vests with the Indian Council of Agricultural Research, who has the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in these journals. The Council has no objection in using the material, provided the information is being utilized for academic purpose but not for commercial use. Due credit line should be given to the ICAR where information will be utilized.

How to Cite

Ramamirtham, C. P., Muthusamy, S., Khambadkar, L. R., Nandakumar, A., Kunhikrishnan, N. P., & Murty, A. V. S. (2011). ESTUARINE OCEANOGRAPHY OF THE VEMBANAD LAKE PART III: THE REGION BETWEEN COCHIN AND THE 3 0 M DEPTH OFF PORTMOUTH. Indian Journal of Fisheries, 34(4), 414-422. https://epubs.icar.org.in/index.php/IJF/article/view/10813