| 电厂温排水对湛江湾海水温升的数值模拟及生态影响评价 |
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| 引用本文： | 陈春亮,梁春林,卢仕严,李斌.电厂温排水对湛江湾海水温升的数值模拟及生态影响评价[J].台湾海峡,2012,31(4):530-539. |
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| 作者姓名： | 陈春亮 梁春林 卢仕严 李斌 |
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| 作者单位： | 广东海洋大学海洋资源与环境监测中心,广东湛江,524088 |
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| 基金项目： | 国家海洋局海洋公益性行业科研专项资助项目 |
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| 摘 要： | 为了清晰了解温排水入海后的时空输移路径和温升范围,及其对海洋环境的影响,以湛江湾内的某电厂为例,应用ECOMSED海洋模式计算其温排水的时空输移路径及温升范围,并结合野外生态调查结果评价其对湛江湾内海洋生态环境的影响.结果表明：某电厂温排水导致湛江湾水体温升大于4℃、2℃、1℃的面积分别为0.110、0.480、1.629 km2,相对于约190 km2的湛江湾海域,影响面积很小;夏季浮游植物丰度随温度升高的变化率分别为-8.534%、-3.573%、-1.613%,浮游动物丰度随温度升高的变化率分别为-4.964%、-1.896%、-0.802%,温排水对浮游动、植物的影响夏季较冬季显著.某电厂温排水对湛江湾内海洋生态环境的影响即使在高温季节也不明显.
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| 关 键 词： | 海洋环境科学 温水扩散 数值模拟 ECOMSED模式 生态影响评价 湛江湾 |
Numerical simulation of seawater temperature rising and the ecological evaluation of the effect of thermal discharged from a power plant in Zhanjiang Bay |
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| CHEN Chun-liang
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LIANG Chun-lin
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LU Shi-yan
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LI Bin.Numerical simulation of seawater temperature rising and the ecological evaluation of the effect of thermal discharged from a power plant in Zhanjiang Bay[J].Journal of Oceanography In Taiwan Strait,2012,31(4):530-539. |
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| Authors: | CHEN Chun-liang LIANG Chun-lin LU Shi-yan LI Bin |
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| Institution: | (Monitoring Centre for Marine Resources and Environment,Guangdong Ocean University,Zhanjiang 524088,China) |
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| Abstract: | To deeply understand the thermal transfer route,the region of temperature rising and the environmental influence of thermal discharged into the sea,a numerical simulation with ECOMSED mode applied was carried out to find out the space-time distribution and temperature rise region of thermal discharged from a power plant in Zhanjiang Bay.Meanwhile,an ecological evaluation of the effect of the thermal on the marine environment in Zhanjiang Bay was carried out,based on the results of field sampling. The results of field sampling showed that plankton has a great variety of species in the sea area under research and the species of phytoplankton and zooplankton were 307 and 223 respectively.As for phytoplankton,the Bacillariophyceae including 54 genera,accounted for 66%,secondly the Pyrrophyta including 21 genera,occupied 25%;the numbers of species was highest in spring,and then was in summer,and the dominance was not evident annually.The community structure of phytoplankton was stable and complex,and has a relatively high anti-jamming capability.As for the 223 species of zooplankton,the species of copepod were highest,then was the Coelenterata.The number of species were highest in winter,then was in spring and the least in autumn.There were only 5 species arisen in all 4 seasons.The seasonal common species were during 15 and 36.Further,the species composition and richness of planktonic larvae were highest in summer,and lowest in spring,which indicates that the breeding summit of zooplankton was in summer. According to the ecological evaluation,the gulf trend in Zhanjiang Bay belonged to the irregular semi-diurnal tide with the reciprocating flow along the main sea route.In the course of spring tide,the current velocity during the ebb tide with a range of 1.1~1.2 m/s was higher than that during the flood tide with a range of 0.8~0.9 m/s. The drainage outlet is situated at the strong current area of Zhanjiang Bay.The thermal discharged would cause more than 1℃ of sea water temperature rise,which reaches 1.836 km to the west and 1.244 to the east,with a maximum distance of 0.529 km from shore.The regions affected by the temperature rising of 4℃,2℃,1℃ were 0.110 km2,0.480 km2,1.629 km2,respectively,while the regions were rather small compared with the 190 km2 of Zhanjing Bay.Further,in summer,the corresponding turnover rates of phytoplankton were-8.534%,-3.573%,-1.613%,respectively,and for zooplankton they were-4.964%,-1.896%,-0.802% respectively.In all,the impact of thermal discharged on plankton communities was greater in summer than in winter.Even in the worst season of summer,the affected area with over 5% of the total amount reduction of plankton during spring tide was 0.913 km2 for phytoplankton and 0.315 km2 for zooplankton.In conclusion,the ecological effects of thermal discharged from power plants is rather weak even in a season of high temperature. |
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| Keywords: | marine environmental science thermal discharged diffusion numerical simulation ECOMSED mode ecological impact assessment Zhanjiang Bay |
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