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Kali river dams

Some studies on the changes in the freshwater ecosystem during the impoundment of the Kali river (Karnataka state, India)

Narayan Ramappa Birasal

Abstract


Dams are constructed across the rivers to stock water for generating electric power, irrigating the land, providing water for domestic and industrial uses, fish culture and for taming the rivers in spate and using them as water ways for transport. Considerable amount of research has been carried out on the limnology of river impoundments in a span of 40 years. It has been now realized that dams and reservoirs do cause environmental hazards. Time has come to now to realize that the construction of dams should be undertaken only after an accurate prediction is made about its impact on the environment and socio-economy. Construction of dams accounts to creation of a new biotope in place of an old one, in a sense; it is a reservoir ecosystem undergoes succession of 4 phases, namely pre-impoundment, filling, post-impoundment and stability phase. In the present study, an opportunity was availed to investigate the hydrobiological status of Supa reservoir during its filling phase when the dam was commissioned and the stocking of water began in 1985. Monthly survey of physico-chemical factors, net phytoplankton, zooplanktonic composition, productivity of the Supa reservoir during its filling phase was investigated for a year from December 1985 to November 1986 and the interrelationship between these parameters and the seasonal variations amongst them is statistically evaluated.

Keywords


Supa reservoir; Physico-chemical factors; Plankton; Primary productivity

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References


R.M. Baxter, P. Glaude. Environmental effects of dams and impoundments in Canada : Experience and prospects. Can. Bull. Fish Aqu. Sci., 1980, 205, 1–34.

B.R. Davies, K.F. Walker. The ecology of river systems, 1986 Dr Junk publishers.

G.E. Petts. Impounded rivers, perspectives for ecological management. 1984 John Wiley and Son, Chichester. Pp 326 + xvii.

K.F. Walker. Regulated streams in Australia: The Murray-Darling system. In The ecology of regulated streams 1979 (Eds. J V Ward and J A Stanford). Pp 143-163. Plenum, New York.

G.F. White. Environmental effects of complex river development. 1977, West view, Boulder, Colorado, USA : xi +172 pp.

M.S. Arcifa, C.G. Froehlich, S.M.F. Gianesella-Galvao. Limnology of ten reservoirs in Southern Brazil. Verh. Internat. Verein. Limnol. 1981, 21, 1048-1053.

T. Bhukaswan, S. Phoprasith. The fisheries of Ubolatna reservoir in the first ten years of impoundment. Proc. IPFC, 1977, 17(3), 195-205.

J.E. Bishop. Limnology of a small Malayan river, Sungai Gombak. Dr Junk publishers. 485 pp. 1973.

B.R. Davies. The Zambezi river system. In The ecology of river systems (Eds. B R Davies and K F Walker) 1986 pp. 225 – 267. Dr Junk publishers.

A.B.M. Egborge. The physical hydrology of the river Oshum, Nigeria. Arch. Hydrobiol., 1972, 70(1), 72-81.

J.I. Furtado. Limnological research and training in developing countries with reference to Malaysia. Proc. First workshop-promotion of limnology in developing countries (Kyoto), 1980, 53-56.

S.C. Ho. The physico-chemical limnology of the Ampang impounding reservoir, Kaula Lampur. Malayan Agri. Journal, 1976, 50(4), 527-544.

A.M.A. Imevbore. The chemistry of the river Niger in the Kainji reservoir area. Arch. Hydrobiol., 1970, 67(3), 412-431.

R.P. Lim. Limnological research and education with reference to natural ecosystems in Malaysia. Proc. 1st workshop-promotion of Limnology in developing countries (Kyoto) 1980, Pp 57-66.

T. Petr. The Purari - Tropical environment of high rainfall river basin. 1983, Dr Junk publishers. 608 pp.

J.A. Thornton. Lake McIlwaine: The eutrophication and recovery of a tropical African (Zimbabwe) man-made lake. 1982 pp 1-264. Dr Junk publishers. Monographiae Biologicae 49.

S.V. Ganapati, A. Sreenivasan. Aspects of limno-biology, primary production and fisheries in the Stanley reservoir, Madras state. Hydrobiologia, 1968, 32(3-4), 551-569.

A. Sreenivasan. Limnology of tropical impoundments. Part I: Hydrological features and fish production in Stanley reservoir, Mettur dam. Int. Revue ges. Hydrobiol. 1966, 51(2), 295-306.

S.V. Kamat. Gazetteer of India: Karnataka state, North Kanara district. 1985, Government publication. pp. 1100 + xvi.

V.S. Upadhyaya. Geological and geophysical investigations at Supa dam site, KHEP, NK. Dissertation submitted for M.Tech degree in Applied geology. 1971, University of Roorkee (UP), India.

M. Bombowna, H. Bucka, W. Huck. Impoundment and their influence on the rivers studied by bioassays. Verh. Internat. Verein. Limnol. 1978, 20, 1629-1633.

R.M. Baxter. Environmental effects of reservoirs. In Microbial processes in reservoirs (Ed. D Gunnison), 1985 pp. 1-26.

W.M. Lewis Jr. Primary production in the plankton community of a tropical lake. Ecol. Monogr., 1974, 44, 377-409.

A. Sreenivasan. Limnology of tropical impoundments: A comparative study of the major reservoirs in Madras state, India. Hydrobiologia, 1970, 36(3/4), 443-469.

A. Sreenivasan. Primary production and fish yield in a tropical impoundment, Stanley reservoir, Mettur dam, Madras state, South India. Proc. Natl. Inst. Sci. India B 1967, 35(2), 125-130.




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