Abstract
Lake Oguta is a relatively small, shallow fresh water body (flood season maximum surface area=2.48 km2; max. depth=9.30 m) but the largest natural lentic system in Southeastern Nigeria. The maximum water depth, surface water temperature, Secchi-disc-transparency and conductivity, varied seasonally with rainfall.
These parameters had ranges of 7.0–9.3 m, 24.0–31.0 °C, 0.61–4.00 m and 8.6–16.5 μS.cm−1, respectively. Weak, unstable thermal stratification developes towards midday in the warmer months (April–August).
The sedimentological data show variation in the lake's particle size distribution; with coarse sandy shores, and fine, silty clay at the deep, open area. The sediment particle size variation is related to relief, transportation and depositional processes. The lake basin is a low energy, aqueous continental depositional environment. The origin of the lake is related to the Quartenary/Holocene Eurasian glaciation which correlate with the pluvials in the tropics.
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References
ADEBISI, A.A., 1980. The physico-chemical hydrology of a tropical season river upper Ogun, Nigeria. Hydrobiologia, 79: 157–165.
ADENIYI, I.F., 1978. Studies on the physico-chemical factors and the planktonic algae of Lake Kainji, Nigeria. Ph. D. Thesis, University of Ife, Ile-Ife, Nigeria, Volumes 1 and 2, 529 pp.
ALLEN, J.R.L., 1964. Studies in fluviatile sedimentation six cyclothems from the Lower Oler Red st. sandstone, Anglo-Welsh Basin. Sedimentology, 3: p. 163–198.
BURKE, K., A.B. DUROTOYE, and A.J. WHITEMAN, 1971. A dry phase South of the Sahara 20,000 years ago. W. Afri. J. Archaeol, 1: 1–8.
EGBORGE, A.B.M., 1979. The effect of impoundment on the water chemistry of Lake Asejire, Nigeria. Freshwat. Biol., 9: 403–412.
FOLK, R.L., 1968. Petrology of Sedimentary rocks. Hemphille's (Austin, Texas), 170 p.
FOLK, R.L., and W.C. WARD, 1957. Brazos river bar: A study in the significance of grain size parameters. J. Sediment. Petrol., 27: 3–36.
FRIEDMAN, G.M. and K.G. JOHNSON, 1983. Exercise in sedimentology. New York, John Wiley & Co.
IMEVBORE, A.M.A., 1967. Hydrology and plankton of Eleiyele reservoir, Ibadan, Nigeria. Hydrobiologia, 30: 104–176.
IMEVBORE, A.M.A., 1975. The chemistry of Kainji Lake waters, 1968–1969. In: Imevbore, A.M.A. & Adegoke, O.S., (eds.), The econology of the Lake Kainji—the transition from river to lake. University of Ife Press, Ile-Ife, Nigeria, 209 pp.
ITA, E.O. and J. BALOGUN, 1983. A preliminary survery of the fisheries of Oguta Lake. Report to the Anambra/Imo River Basin Development Authority, Owerri, Imo State, Nigeria, 49 pp.
KRUMBEIN, W.C. and L.L. SLOSS, 1934. Stratigraphy and Sedimentation. San Francisco Freeman and Company. 2nd Ed., p. 93–147.
LOZAN CONSULTANTS, 1976. Preliminary study of the possibility of using Oguta Lake as a port. A report to the government of former East Central State Government, 86 p.
MACHLACHLAN, S., 1961. Physical and chemical characteristics of bottom deposits. In: Lake Kariba fisheries Research Institute symposium. pp. 43–46.
NWADIARO, C.S., N.A. ORANUSI, and S.N. UMEHAM, 1982. Preliminary survey of the drinking water quality of some areas in Imo and River States of Nigeria. Proc. 3rd National Conference on Water pollution, pp. 40–49, Federal Ministry of Works Lagos. Nigeria.
NWADIARO, C.S., and P.U. OKORIE, 1985. Biometric characteristics, length/weight relationship and condition factors inChrysichthys filamentosus (Pisces: Bagridae) from Oguta Lake, Imo State Nigeria. Biologia Africana, 2(1): 48–57.
NWADIARO C.S., and S.N. UMEHAM, 1985. The chemical hydrology of Oguta Lake, Imo State, South Eastern Nigeria. Arch. Hydrobiol., 105: 251–269.
NWADIARO, C.S., and P.U. OKORIE, 1986. Some aspects of the reproductive biology ofChrysichthys filamentosus (Teleostei: Bagridae) in Oguta Lake, Nigeria. Rev. Zool. Afri., 99: 233–241.
NWADIARO, C.S., and E. OJI, 1986. Phytoplankton productivity and chlorophyll-a concentration of Oguta Lake, Imo State, Nigeria. Hydrobiol. Bull. 19(2): 128–131.
NWADIARO, C.S., and P.U. OKORIE, 1987. Food and feeding habits of the African bagrid.Chrysichthys filamentosus in Oguta Lake, South Eastern Nigeria. Jap. J. Ichtyl, 33/34: 376–383
NWADIARO, C.S. In press. Preliminary observations on the nature, taxonomic composition, distribution, behaviour and nutrient requirements of the unusual algal jellies of Oguta Lake. Int. Rev. Ges. Hydrobiol.
OLANIYAN, C.I.O., 1961. The seasonal variation in the hydrology and plankton of Lagoons of southwest Nigeria.
POTTER, E.P., 1978. Significance and origin of big rivers. J. Geol., 86: 13–33.
REYMENT, R.A., 1965. Aspects of the geology of Nigeria, Ibadan University Press, Ibadan, Nigeria.
ROGERS, A.S., A.M.A. IMEVBORE, and O.S. ADEGOKE, 1969. Physical and chemical properties of Okogosi warm spring, Western Nigeria. J. Min. Geol., 4: 69–81.
RYDER, R.A. 1965. A method for estimating the potential fish production of north temperate lakes. Trans. Am. Fish. Soc., 94(3): 214–218.
SHORT, K.C. and A.J. STAUBEL, 1967. Outline of the geology of the Nigeria Delta. A.A.P.G. Bull., 51: 761–779.
THOMAS, J.D., and P.J. RATCLIFFE, 1973. Observations on Limnology and primary production of a small man-made lake in West African Savannah. Freshwat. Biol., 3: 573–612.
WAYLAND, E.J., 1929. African pluvial periods. Nature, London, 123: 607 pp.
WELCH, P.S., 1948. Limnological Methods. McGraw-Hill Co. Ltd., N.Y. U.S.A., 381 pp.
WETZEL, R.G., and G.E. LIKENS, 1979. Limnological analysis. W.B. Saunders Co. Ltd., Philadelphia, N.Y. U.S.A.
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Odigi, M.I., Nwadiaro, C.S. Geophysical limnology of lake Oguta in Southeastern Nigeria with notes on its possible origin. Hydrobiological Bulletin 22, 113–126 (1988). https://doi.org/10.1007/BF02256815
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DOI: https://doi.org/10.1007/BF02256815