渤海湾天津近岸海域化学需氧量的分布特征、影响因素及与富营养化的关系
发布时间：2019-05-18 10:22
【摘要】：本文根据2014年春季(5月)、夏季(8月)、秋季(10月)天津近岸海域18个站位的海水质量监测数据,分析了海水中化学需氧量(Chemical Oxygen Demand,COD)的时空分布特征和海域富营养化状况,研究了COD与营养状态质量指数(NQI)的关系,浅析了赤潮生消过程中COD浓度的变化。结果表明,夏季COD高于春季和秋季,季节性差异显著;COD基本呈现近岸高外海低、南部高北部低的趋势;NQI指数的变化范围为1.68~12.50,平均值为4.46,富营养化严重;COD与NQI指数具有显著正相关性,一定程度上可以反映海域富营养化状况;COD与赤潮生物密度、Chl a呈极显著正相关关系,在反映赤潮生消过程中有重要作用。
[Abstract]:Based on the monitoring data of seawater quality at 18 stations in spring (May), summer (August) and autumn (October) of Tianjin inshore waters in spring (May), summer (August) and autumn (October) of 2014, the chemical oxygen demand (Chemical Oxygen Demand,) in seawater is analyzed in this paper. The temporal and spatial distribution characteristics of COD) and eutrophication in sea area were studied. the relationship between COD and nutritional quality index (NQI) was studied, and the change of COD concentration during red tide generation and elimination was analyzed. The results showed that the COD in summer was higher than that in spring and autumn, and the seasonal difference was significant. COD basically showed the trend of high offshore and low in the south and north, and the NQI index varied from 1.68 to 12.50, with an average value of 4.46, and eutrophication was serious. There was a significant positive correlation between COD and NQI index, which could reflect the eutrophication in sea area to a certain extent, and there was a very significant positive correlation between COD and red tide biological density, Chl a, which played an important role in reflecting the occurrence and elimination of red tide.
【作者单位】： 上海海洋大学海洋科学学院;国家海洋局天津海洋环境监测中心站;天津市海洋环境监测预报中心;
【基金】：天津市科技兴海项目(KJXH2014-13,KJXH2014-22) 国家海洋局海洋生态环境科学与工程重点实验室开放基金(MESE-2012-07)
【分类号】：X55
本文编号：2479914
[Abstract]:Based on the monitoring data of seawater quality at 18 stations in spring (May), summer (August) and autumn (October) of Tianjin inshore waters in spring (May), summer (August) and autumn (October) of 2014, the chemical oxygen demand (Chemical Oxygen Demand,) in seawater is analyzed in this paper. The temporal and spatial distribution characteristics of COD) and eutrophication in sea area were studied. the relationship between COD and nutritional quality index (NQI) was studied, and the change of COD concentration during red tide generation and elimination was analyzed. The results showed that the COD in summer was higher than that in spring and autumn, and the seasonal difference was significant. COD basically showed the trend of high offshore and low in the south and north, and the NQI index varied from 1.68 to 12.50, with an average value of 4.46, and eutrophication was serious. There was a significant positive correlation between COD and NQI index, which could reflect the eutrophication in sea area to a certain extent, and there was a very significant positive correlation between COD and red tide biological density, Chl a, which played an important role in reflecting the occurrence and elimination of red tide.
【作者单位】： 上海海洋大学海洋科学学院;国家海洋局天津海洋环境监测中心站;天津市海洋环境监测预报中心;
【基金】：天津市科技兴海项目(KJXH2014-13,KJXH2014-22) 国家海洋局海洋生态环境科学与工程重点实验室开放基金(MESE-2012-07)
【分类号】：X55
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