海洋科学Issue(3)：20-25,6.DOI:10.11759/hykx20130227005
钦州湾海域COD时空分布及对富营养化贡献分析
Temporal and spatial distributions of COD and its contribu-tion to the eutrophication in the Qinzhou Bay
摘要
Abstract
Based on the investigation data in the Qinzhou Bay in April (spring) and September (autumn) of 2010, the dis-tribution characteristics of chemical oxygen demand (COD) and its influencing factors were studied. The pollution level was evaluated, and its contribution to the eutrophication in the study area was analyzed. Meanwhile, the main source of COD, the relationship between COD and environmental factors were also discussed. The results showed that the average concen-tration of COD was (1.21 ± 0.55) mg/L, with a range from 0.57 mg/L to 2.38 mg/L . The distribution of COD was charac-terized by a decreasing tendency from the upper bay to the outside bay in spring and autumn. The pollution level of COD in autumn was higher than that in spring. The range of contribution to the eutrophication was from 42.1%to 64.7%, and the mean value was (50.3 ± 6.7)%. The contribution decreased with the increase of eutrophication index. During the survey pe-riod, the content of COD showed a negative correlation with salinity and pH, while a positive correlation with DIN and 23SiO -Si. The temporal and spatial distributions of COD were affected by the land runoff, terrestrial input and hydrody-namic process. COD was an important factor contributing to eutrophication, but was not the decisive factor., When the eu-trophication degree increased, the contribution of nutrient to the eutrophication became more dramatic.关键词
COD/分布特征/影响因素/富营养化贡献/钦州湾Key words
COD/distribution characters/influencing factors/contribution to the eutrophication/Qinzhou Bay分类
资源环境引用本文复制引用
杨斌,钟秋平,鲁栋梁,林美芳,李尚平..钦州湾海域COD时空分布及对富营养化贡献分析[J].海洋科学,2014,(3):20-25,6.基金项目
广西自然科学基金项目(2010GXNSFA013063,2010GX-NSFE013006) （2010GXNSFA013063,2010GX-NSFE013006）
广西教育厅科研项目(201106LX546) （201106LX546）
