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刘熊,雷富,戴圣生,王伊华,梁千千,谭凯燕,陈丽雯.2021年秋季广西廉州湾海域营养盐及水质状况分析[J].广西科学院学报,2022,38(3):288-294. [点击复制]
- LIU Xiong,LEI Fu,DAI Shengsheng,WANG Yihua,LIANG Qianqian,TAN Kaiyan,CHEN Liwen.Analysis of Nutrients and Water Quality in Lianzhou Bay of Guangxi in Autumn of 2021[J].Journal of Guangxi Academy of Sciences,2022,38(3):288-294. [点击复制]
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| 2021年秋季广西廉州湾海域营养盐及水质状况分析 |
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刘熊1,2, 雷富1,3, 戴圣生4, 王伊华1,3, 梁千千1,3, 谭凯燕5, 陈丽雯1,3
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| (1.广西科学院, 广西北部湾海洋研究中心, 广西近海海洋环境科学重点实验室, 广西南宁 530007;2.防城港市海域使用动态监管中心, 广西防城港 538001;3.广西科学院, 广西北部湾海洋研究中心, 广西海洋天然产物与组合生物合成化学重点实验室, 广西南宁 530007;4.广西科学院, 广西南宁 530007;5.广西壮族自治区产品质量检验研究院, 广西南宁 530200) |
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| 摘要: |
| 2021年10月(秋季)对廉州湾近岸海域进行现场调查，分析廉州湾营养盐的分布特征，并利用富营养化指数和有机污染指数对该海域海水水质进行等级划分与评价。结果显示：秋季廉州湾海域的溶解态无机氮(DIN)浓度为0.149-1.587 mg/L，均值为0.493 mg/L；溶解态无机磷(DIP)浓度为0.010-0.084 mg/L，均值为0.033 mg/L；化学需氧量(COD)浓度为0.89-3.27 mg/L，均值为1.47 mg/L。DIN呈现近岸高、中部低的分布；DIP由湾内至湾外呈递减趋势，梯度分布明显，受河流输入影响显著。调查区域的富营养化指数为0.48-76.25，均值为12.23，大多数站位的水质状况属于轻度至中度富营养水平，严重富营养化主要出现在南流江口附近的站位；有机污染指数为-0.15-7.20，均值为1.80，研究区域50%的水质受到不同程度污染，南流江水质污染最严重，属于严重污染水域。总体来看，河流输入的陆源污染和人类对廉州湾海域的开发利用，是廉州湾海域富营养化和有机污染程度高的主要原因。 |
| 关键词: 营养盐 海水水质 富营养化 污染状况 廉州湾 |
| DOI：10.13657/j.cnki.gxkxyxb.20220804.001 |
| 投稿时间：2022-05-27修订日期：2022-06-08 |
| 基金项目:广西科技重大专项(桂科AA17202020)和广西近海海洋环境科学重点实验室开放基金项目(GXKLHY21-03)资助。 |
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| Analysis of Nutrients and Water Quality in Lianzhou Bay of Guangxi in Autumn of 2021 |
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LIU Xiong1,2, LEI Fu1,3, DAI Shengsheng4, WANG Yihua1,3, LIANG Qianqian1,3, TAN Kaiyan5, CHEN Liwen1,3
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| (1.Guangxi Key Laboratory of Marine Environmental Science, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China;2.Center for Dynamic Supervision for Usage of Fangchenggang City Sea Area, Fangchenggang, Guangxi, 538001, China;3.Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China;4.Guangxi Academy of Sciences, Nanning, Guangxi, 530007, China;5.Guangxi Zhuang Autonomous Region Institute of Product Quality Inspection, Nanning, Guangxi, 530200, China) |
| Abstract: |
| In October 2021 (autumn),a field survey was carried out in the coastal waters of Lianzhou Bay to analyze the distribution characteristics of nutrient in the bay,and the seawater quality was graded and evaluated by eutrophication index and organic pollution index.The results showed that the concentration of dissolved inorganic nitrogen (DIN) in Lianzhou Bay in autumn was 0.149-1.587 mg/L,with an average of 0.493 mg/L.The concentration of dissolved inorganic phosphorus (DIP) was 0.010-0.084 mg/L,with an average of 0.033 mg/L.The concentration of chemical oxygen demand (COD) was 0.89-3.27 mg/L,with an average of 1.47 mg/L.The spatial distribution of inorganic nitrogen was higher near shore and lower in the middle.DIP showed a decreasing trend from the inner bay to the outer bay,and the gradient distribution was obvious,which was significantly affected by river input.The eutrophication index of the survey area was 0.48-76.25,with an average of 12.23.The water quality of most stations was at mild to moderate eutrophication level,and the severe eutrophication level mainly occurred at the stations near the Nanliu Estuary.The organic pollution index was -0.15-7.20,with an average of 1.80,and 50% of the water quality in the study area were polluted to varying degrees.The water pollution of Nanliu River was the most serious,which belonged to the seriously polluted water area.Overall,the river input of terrestrial pollution and human development and utilization of the Lianzhou Bay waters are the main reasons for the high degree of eutrophication and organic pollution in the Lianzhou Bay waters. |
| Key words: nutrient seawater quality eutrophication pollution status Lianzhou Bay |
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