渔业科学进展2016，Vol.37Issue(4)：43-48,6.DOI:10.11758/yykxjz.20150526001
渤海中部COD的时空分布特征及其对富营养化的贡献分析
Temporal and Spatial Distribution of COD and Its Source and Contribution to Eutrophication in the Central Bohai Sea
摘要
Abstract
The temporal and spatial distribution of chemical oxygen demand (COD) in different water layers, and its source and contribution to eutrophication were analyzed in this study based on data collected in the Bohai Sea in all 4 seasons of 2013. The results showed that the highest average concentration of COD appeared in summer, followed by autumn; while the lowest concentration appeared in spring. The analysis about vertical distribution of COD showed that the highest and lowest concentrations of COD appeared in the surface and middle layers in spring, and they appeared in the surface and bottom layers respectively in summer; in autumn and winter they were observed in the middle and bottom layers. As for the horizontal distribution the average COD concentration was distributed quite evenly in spring; in summer COD concentration was the highest in the western sea area and displayed a gradual decrease from the west to the east; in winter the highest concentration was detected in the northern area and it dropped from the north to the south. During the survey period, the COD level in most stations met the first-class seawater quality standard. TheE value ranged from 0.088 to 2.995, and the average was 0.337±0.403. There were 25 stations in which theE values were above 1, including 20 stations in autumn and 5 stations in winter. These results indicated that the surveyed regions might not undergo eutrophication. The contribution of COD to eutrophication ranged from 46.15% to 141.41%, and the average was (71.36±14.98)%, which suggested that COD played an important role in the eutrophication of the Bohai Sea.关键词
渤海/COD/分布特征/富营养化贡献Key words
The Bohai Sea/COD/Distribution characteristics/Contribution to eutrophication分类
资源环境引用本文复制引用
张艳,曲克明,李秋芬,赵俊,崔正国,周明莹,朱建新,丁东生,过锋,刘传霞..渤海中部COD的时空分布特征及其对富营养化的贡献分析[J].渔业科学进展,2016,37(4):43-48,6.基金项目
农业部溢油专项“渤海生态环境监测评估”(农办渔【2012】117号)和“应对溢油关键技术专项研究”(2012-NZ-5739)共同资助。 （农办渔【2012】117号）
