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首页> 美国政府科技报告 >Effects of Thermal Discharges on the Seasonal Patterns of Nutrient Concentrations in Brackish Water. Experiences at the Biotest Basin, Forsmark, Sweden
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Effects of Thermal Discharges on the Seasonal Patterns of Nutrient Concentrations in Brackish Water. Experiences at the Biotest Basin, Forsmark, Sweden

机译：热量排放对微咸水养分浓度季节变化的影响。瑞典Forsmark生物技术盆地的经验

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Massiv quantities of water are used in power plant cooling systems, especially nuclear power plants, and are often returned to the donor ecosystem at significantly elevated temperatures. Few studies of the environmental effects of such a situation have looked extensively at the effects on nutrients in the water. The present study examined the effects of cooling water discharges from a nuclear power plant on the seasonal nutrient patterns within and outside a brackish water, research artificial lake, the 0.9 km sup 2 Biotest Basin on Sweden's east coast. The lack of ice cover in winter is the most apparent effect. In a portion of the lake with a relatively long water residence time, on the order of a few days, the vernal nutrient depletion of phosphate, nitrate, and nitrite apparently began sooner than outside the lake. Benthic influence on nutrient concentrations in the free water mass may be very significant in coastal areas receiving heat inputs. This study's data apparently support the conclusion by other researchers that phosphorus may be the nutrient limiting algal growth in the spring in this area of the central Baltic Sea. Determination of a nutrient budget for the Basin was unachievable because inlet and outlet nutrient concentrations were insufficiently different to override experimental variation. Implications for management of heat inputs to coastal ecosystems include avoidance of areas with high nutrient content, rich organic sediment, or poor flushing. (author). With 46 refs. (ERA citation 11:053957)

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