LNG项目排水中余氯对近岸海域水环境影响的数值模拟
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摘要
根据LNG项目排水受纳水域潮流特征以及不同季节的设计典型水文条件,利用二维水动力模型模拟了江苏近岸辐射状沙脊群浅海区的潮流场,并以此作为模拟冷排水中余氯在受纳海域迁移转化的时间变化、空间分布特征的水动力条件,同时考虑余氯在水体中的衰减效应,建立余氯二维对流-扩散模型,预测受纳水域余氯浓度空间分布、时间变化特征。根据海洋生物余氯慢性毒性阈线,定量分析了含氯排水对近岸海域水环境的影响范围,结果表明:LNG项目冷排水中余氯对近岸海域水环境影响较小。
According to the tidal current characteristics of drainage and receiving water in LNG project and the typical hydrological conditions of design in different seasons,the paper used a two- dimensional hydrodynamic model to simulate the tidal current field of water receiving residual chlorine in cold water discharge in radial sand ridge group of shallow sea area of Jiangsu maritime space.As the hydrodynamic conditions in the simulation of cold water mobility and transfer of residual chlorine in the reception area of time and space distribution characteristics,it established a two dimensional model of the transport and diffusion for the residual chlorine to predict the receiving waters residual chlorine concentration distribution and analyze its environmental impact in considering the residual chlorine in water body of attenuation effect at the same time.Finally,the scope of influence caused by the chlorine water drainage in the chlorine water's sphere was analyzed quantitatively according to the chronic toxicity threshold line of residual chlorine.Results show that the residual chlorine in cold drainage of LNG project has less impact on the water environment in offshore area.
According to the tidal current characteristics of drainage and receiving water in LNG project and the typical hydrological conditions of design in different seasons,the paper used a two- dimensional hydrodynamic model to simulate the tidal current field of water receiving residual chlorine in cold water discharge in radial sand ridge group of shallow sea area of Jiangsu maritime space.As the hydrodynamic conditions in the simulation of cold water mobility and transfer of residual chlorine in the reception area of time and space distribution characteristics,it established a two dimensional model of the transport and diffusion for the residual chlorine to predict the receiving waters residual chlorine concentration distribution and analyze its environmental impact in considering the residual chlorine in water body of attenuation effect at the same time.Finally,the scope of influence caused by the chlorine water drainage in the chlorine water's sphere was analyzed quantitatively according to the chronic toxicity threshold line of residual chlorine.Results show that the residual chlorine in cold drainage of LNG project has less impact on the water environment in offshore area.
引文
[1]王华北.我国LNG工业发展及应用研究[D].大庆:大庆石油学院,2009.
[2]Brook A J,Baker A L.Chlorination at power plant:impact on phytoplankton productivity[J].Science,1972,178(4042):1414-1415.
[3]曾江宁,陈全震,郑平,等.余氯对水生生物的影响[J].生态学报,2005,25(10):2717-2724.
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[5]张燕,孙英兰.电厂温排水中余氯浓度预测[J].海洋科学,2007,31(2):5-8.
[6]徐兆礼,李鸣,张光玉,等.涉海电站取排水口工程设计环保措施[J].海洋环境科学,2011,30(2):234-238.
[7]毕闻彬,孙英兰.余氯排海浓度预测及渔业损失计算[J].海洋湖沼通报,2009(1):57-60.
[8]张存勇.连云港近岸海域潮流动力特征[J].水运工程,2012(9):30-34.
[9]张学庆,孙英兰.胶南近岸海域三维潮流数值模拟[J].中国海洋大学学报(自然科学版),2005,35(4):579-582.
[10]王学昌,孙长青,孙英兰,等.填海造地对胶州湾水动力环境影响的数值研究[J].海洋环境科学,2000,19(3):55-59.
[11]刘兰芬,郝红,鲁光四.电厂温排水中余氯衰减规律及其影响因素的实验研究[J].水利学报,2004(5):94-98.
[12]张穗,黄洪辉,陈浩如,等.大亚湾核电站余氯排放对邻近海域环境的影响[J].海洋环境科学,2000,19(2):14-18.
[13]Carpenter E J,Peck B B,Ander S J.Cooling water chlorination and productivity of entrained phytoplankton[J].Marine Biology,1972,16(1):37-40.
[14]Fisher D J,Burton D T,Yonkos L T,et al.The relative acute toxicity of continuous and intermittent exposures of chlorine and bromine to aquatic organism in the presence and absence of ammonia[J].Water Research,1999,33(3):760-768.
[15]Matlice J S,Zittlel H E.Site-specific evaluation of power plant Chlorination[J].Journal Water Pollution Control Federation,1976,48(10):2284-2308.
[2]Brook A J,Baker A L.Chlorination at power plant:impact on phytoplankton productivity[J].Science,1972,178(4042):1414-1415.
[3]曾江宁,陈全震,郑平,等.余氯对水生生物的影响[J].生态学报,2005,25(10):2717-2724.
[4]吐尔逊阿依·木依提,韩龙喜,金坚.电厂温排水余氯对水环境影响的数值模拟[J].河海大学学报(自然科学版),2008,36(4):475-478.
[5]张燕,孙英兰.电厂温排水中余氯浓度预测[J].海洋科学,2007,31(2):5-8.
[6]徐兆礼,李鸣,张光玉,等.涉海电站取排水口工程设计环保措施[J].海洋环境科学,2011,30(2):234-238.
[7]毕闻彬,孙英兰.余氯排海浓度预测及渔业损失计算[J].海洋湖沼通报,2009(1):57-60.
[8]张存勇.连云港近岸海域潮流动力特征[J].水运工程,2012(9):30-34.
[9]张学庆,孙英兰.胶南近岸海域三维潮流数值模拟[J].中国海洋大学学报(自然科学版),2005,35(4):579-582.
[10]王学昌,孙长青,孙英兰,等.填海造地对胶州湾水动力环境影响的数值研究[J].海洋环境科学,2000,19(3):55-59.
[11]刘兰芬,郝红,鲁光四.电厂温排水中余氯衰减规律及其影响因素的实验研究[J].水利学报,2004(5):94-98.
[12]张穗,黄洪辉,陈浩如,等.大亚湾核电站余氯排放对邻近海域环境的影响[J].海洋环境科学,2000,19(2):14-18.
[13]Carpenter E J,Peck B B,Ander S J.Cooling water chlorination and productivity of entrained phytoplankton[J].Marine Biology,1972,16(1):37-40.
[14]Fisher D J,Burton D T,Yonkos L T,et al.The relative acute toxicity of continuous and intermittent exposures of chlorine and bromine to aquatic organism in the presence and absence of ammonia[J].Water Research,1999,33(3):760-768.
[15]Matlice J S,Zittlel H E.Site-specific evaluation of power plant Chlorination[J].Journal Water Pollution Control Federation,1976,48(10):2284-2308.