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Organic matter accumulation in the bottom sediments and its regulatory aspects in the southern basin of Lake Biwa

Abstract

Approximately 14 million people get their drinking and industrial water from the most southern part of Lake Biwa. This shallow region, however, has been eutrophicated severely from year to year by nutrients loading from both the surrounding inflowing rivers and the north basin. Sedimented solids of the surface layer of bottom sediments are stirred up very frequently by strong winds and waves in this shallow region. Moreover, the water quality has been deteriorated by the release of nutrients from the surface layer of bottom sediments in which organic matter has accumulated. For the period 1989 to 1990, the suspended solids content had a close correlation with the COD value, and the T-N and T-P concentrations in the water of inflowing rivers to the basin. T-N release rate from the surface layer of bottom sediments ranged from 6.3 to 213.8 mg m-2 d-1 and the release load was 936 kg d-1 for the entire 58 km2 of the south basin. On the other hand, T-P release rate ranted from 0.91 to 3.56 mg m-2 d-1 and the total release load was approximately 69 kg d-1 in the basin. Suction dredging of organic matter rich sediments was carried out in the basin to improve the water quality. Removed sediments were used after processing for various kinds of construction materials, such as bricks for pavement, walls of domestic houses, and ornamental materials of public buildings.

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References

  • De Pinto, J. V., T. C. Young & L. M. McIlroy, 1986. Great Lakes water quality improvement. Environ. Sci. Technol. 20(8): 752–759.

    Google Scholar 

  • Kurata, A., 1970. Vitamin B12 transudation from marine bottom muds (in Japanese). J. Oceanogr. Soc. Japan. 26: 81–86.

    Google Scholar 

  • Kurata, A., 1979. Water Pollution of Lake Biwa — II. Toxic substances contamination in bottom sediments and biological accumulation of toxic substances (in Japanese). J. Technology for Water Treatments 20: 917–926.

    Google Scholar 

  • Lampert, W. & K.-O. Rothhaupt (eds), 1989. Limnology in the Federal Republic of Germany. Internat. Assoc. Theoret. Appl. Limnol. Plön. 170 pp.

    Google Scholar 

  • Länsstyrelsen i, Kronobergs Län & Växjö, Kommun (eds), 1977. Sjön Trummen i Växjö; Förstörd-Restaurerad-Pånyttfödd. Växjö. 32 pp.

    Google Scholar 

  • National Water Research Institute, 1989. Current Research '89. Burlington, Ontario. 47 pp.

  • Straškraba, M., J. G. Tundisi & A. Duncan (eds), 1993. Comparative Reservoir Limnology and Water Quality Management. Kluwer Academic Publishers, Dordrecht. 291 pp.

    Google Scholar 

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Kurata, A. Organic matter accumulation in the bottom sediments and its regulatory aspects in the southern basin of Lake Biwa. J Aquat Ecosyst Stress Recov 3, 171–176 (1994). https://doi.org/10.1007/BF00043238

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  • DOI: https://doi.org/10.1007/BF00043238

Key words

  • bottom sediments
  • nutrient release
  • suction dredging
  • bricks
  • pavement