Summary
The hydrological conditions of the Bhavanisagar Reservoir and the plankton for the years 1961 and 1962 are detailed. There seems to be some difference in physico-chemical conditions during these two years when compared with the data of previous five years. Thermal stratification was rare but oxygen deficit in hypolimnion was severe. Supersaturation was rare and the higher pH values noted between 1956–1960 were not recorded during 1961–62. The electrical conductivity increased with depth and showed seasonal changes paralleling the changes in bicarbonate content. Deficiency of nutrients, phosphate and nitrate continued as usual though the silicate content was normal. The plankton organisms occurring in different months are listed. Excessive inflow and outflow restricted plankton blooms. The effect of the position of discharge sluices on the oxygen regimen and temperature are discussed.
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Communicated by Dr. B. S. Bhimachar,f.a.sc.
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Sreenivasan, A., Soundar Raj, R. & Felicy Antony, K. Limnological studies of tropical impoundments. Proc. Indian Acad. Sci. 59, 53–71 (1964). https://doi.org/10.1007/BF03052389
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DOI: https://doi.org/10.1007/BF03052389