【摘要】：本文根據(jù)2014年春季(5月)、夏季(8月)、秋季(10月)天津近岸海域18個(gè)站位的海水質(zhì)量監(jiān)測(cè)數(shù)據(jù),分析了海水中化學(xué)需氧量(Chemical Oxygen Demand,COD)的時(shí)空分布特征和海域富營(yíng)養(yǎng)化狀況,研究了COD與營(yíng)養(yǎng)狀態(tài)質(zhì)量指數(shù)(NQI)的關(guān)系,淺析了赤潮生消過(guò)程中COD濃度的變化。結(jié)果表明,夏季COD高于春季和秋季,季節(jié)性差異顯著;COD基本呈現(xiàn)近岸高外海低、南部高北部低的趨勢(shì);NQI指數(shù)的變化范圍為1.68~12.50,平均值為4.46,富營(yíng)養(yǎng)化嚴(yán)重;COD與NQI指數(shù)具有顯著正相關(guān)性,一定程度上可以反映海域富營(yíng)養(yǎng)化狀況;COD與赤潮生物密度、Chl a呈極顯著正相關(guān)關(guān)系,在反映赤潮生消過(guò)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.
【作者單位】： 上海海洋大學(xué)海洋科學(xué)學(xué)院;國(guó)家海洋局天津海洋環(huán)境監(jiān)測(cè)中心站;天津市海洋環(huán)境監(jiān)測(cè)預(yù)報(bào)中心;
【基金】：天津市科技興海項(xiàng)目(KJXH2014-13,KJXH2014-22) 國(guó)家海洋局海洋生態(tài)環(huán)境科學(xué)與工程重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金(MESE-2012-07)
【分類(lèi)號(hào)】：X55

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