Effects of cooling water discharges from a power plant on reservoir water quality

• Autorzy: Kowalski E. , Mazierski J.
• Języki publikacji: EN

Abstrakty

EN

The use of natural or artificial water reservoirs by thermal power plants for cooling purposes alterswater ecosystems. Water ecosystems are mainly subjected to the abiotic influences of higher temperature and increased mixing. This study presents the thermal and oxygen conditions in a lake used for cooling water as well as the chemical changes occurring in it. There is a spatial differentiation in the temperature of the water surface over time periods (in summer and winter). The vertical water temperature changes were definitely different from those of natural, unaffected lakes. Apart from a higher average water temperature, typical mixing and stratification periods were not observed. This apparently affected the dissolved oxygen conditions. The observed absence of a dissolved oxygen deficit resulted from the lack of a thermocline, which positively affected water quality. As a result, the two anthropogenic factors, i.e., the discharge of warm water and increased mixing, have flattened the negative effects on the lake. A new characteristic equilibrium for this lake was established. Single factors have been compensated for by this equilibrium. A relationship between temperature and biomass concentration was observed. The trophic state index (TSI) values permit classifying Rybnik Reservoir as a eutrophic lake.

Słowa kluczowe

EN

cooling system; water quality; water temperature

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2008
• Tom: Vol. 37, No.2
• Strony: 107--118
• Opis fizyczny: bibliogr. 15 poz., wykr.

Twórcy

autor

Kowalski E.

autor

Mazierski J.

• Institute of Environmental Engineering, Polish Academy of Sciences ul. M. Skłodowskiej-Curie 34, 41-800 Zabrze, Poland,

Bibliografia

• Amarasinghe P.B., Vijverberg J. , 2002, Primary production in a tropical reservoir in Sri Lanka, Hydrobiologia, 487: 85-93
• EEI, 1996, Environmental Directory of US Power Plants, 1996, Edison Electric Institute, Washington, DC
• Bloemkolk J.W., Van der Schaff R.J., 1996, Design alternatives for the use of cooling water in the process industry: minimization of the environmental impact for cooling systems, J. Cleaner Prod., 4(1): 21-27
• Carlson R.E., 1977, A trophic state index for lakes. Limnology and Oceanography, 22: 361-69.
• Gołdyn R., Joniak T., Kowalczewska-Madura K., Kozak A., 2003, Trophic state of a lowland reservoir during 10 years after restoration, Hydrobiologia, 506-509: 759-65.
• Hense I., Beckmann A., 2006, Towards a model of cyanobacteria life cycle-effects of growing and resting stages on bloom formation of N2-fixing species, Ecological Modelling, 195: 205-18
• Kostecki M., 2001, The limnological characteristic of the Plawniowice dam-reservoir (Upper Silesia, Poland) - Thermal and oxygen conditions after 23years of exploatation, Arch. Ochr. Środ., 27(2): 97-124 (in Polish, summary in English )
• Kostecki M., 2004, Anthropopression on the formation of the thermal structure on the Rybnik dam-reservoir, Arch. Ochr. Środ., 30 (4): 41-52 (in Polish, summary in English)
• Kostecki M., 2005, Specificity of the thermal conditions of the "Rybnik" water reservoir as the effect of heated waters discharge, Prob. Ekol., 3(51): 151-61 (in Polish, summary in English)
• Kratzer C.R., Brezonik P.L., 1981, A Carlson-type trophic state index for nitrogen in Florida lakes. Water. Res. Bull., 17: 713-15.
• Rai A.K., 2000, Limnological characteristics of subtropical Lakes Phewa, Begnas, and Rupa in Pokhara Valley, Nepal, Limnology, 1: 33-46
• Standard Methods for Examination of Water and Wastewater. 15th ed., 1981, American Public Health Association, 1015 18th Street, N.W., Washington, D.C. 20036
• Veil J.A., Puder M.G, Littleton D.J., Moses D.O., 1999, Cooling water use patterns at US nonutility electric generating facilities, Environmental Science & Policy, 2: 477-87
• Veil J.A., 2000, Potential impacts of 316(b) regulatory controls on economics, electricity reliability, and the environment, Environmental Science & Policy, 3: S1-S6
• Zdanowski B., Wilkońska H., Ciepielewski W., Socha D., Swiątecki A., Tunowski J., 1991, Three decades of the Konin lakes - importance and human consciousness, Komunikaty Rybackie, 4: 2-7 (in Polish)