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九龙江河口区海水水质模糊综合评价
王翠,郭洲华,李青生
0
(自然资源部第三海洋研究所,福建 厦门 361005)
摘要:
根据九龙江河口区2011—2018年的监测数据,分析了该海域海水中无机氮(inorganic nitrogen, DIN)、活性磷酸盐(active phosphate, DIP)、化学耗氧量(chemical oxygen demand, COD)和石油类含量的年际变化趋势和平面分布特征,并应用模糊综合评价法对九龙江河口区的水质进行了评价。结果表明,2011—2018年,九龙江河口区DIN和DIP年均含量呈现先增加后降低趋势,COD年均含量呈现逐年下降趋势,而石油类年均含量总体呈波动变化趋势;DIN、DIP、COD和石油类均受九龙江径流输入的影响,含量平面分布大部分呈现西南部高于东北部的特征。模糊综合评价显示九龙江河口区水质为Ⅳ类水,主要污染物是DIN和DIP。水质综合评分值逐年变大,表明水质开始出现好转趋势。
关键词:  海洋环境科学  模糊综合评价  水质评价  九龙江河口区
DOI:10.3969/J.ISSN.2095-4972.2023.01.008
基金项目:厦门市自然科学基金资助项目(3502Z20227248);中国长江三峡集团公司资助项目(CTGFB/0002-2018);福建省生态环境厅科技资助项目(2021R021)
Fuzzy comprehensive evaluation of seawater quality in Jiulongjiang Estuary
WANG Cui,GUO Zhouhua,LI Qingsheng
(Third Institute of Oceanography, MNR, Xiamen 361005, China)
Abstract:
Based on the monitoring data from 2011 to 2018, the trends of inter-annual variations and spatial distribution characteristics of inorganic nitrogen (DIN), active phosphate (DIP), chemical oxygen demand (COD) and petroleum concentrations in Jiulongjiang Estuary were analyzed. The water quality of the area was evaluated and analyzed with fuzzy comprehensive evaluation method. The results showed that the annual average concentrations of DIN and DIP in Jiulongjiang Estuary increased first and then decreased, while the annual average concentrations of COD decreased yearly and the average annual concentrations of petroleum fluctuated. The concentrations of DIN, DIP, COD and petroleum were higher in the southwest than in the northeast of estuary, and they were all affected by the runoff of Jiulong River. The fuzzy comprehensive evaluation showed that the water quality of Jiulongjiang Estuary was under level IV based on the national standard of sea water quality, and the main pollutants were DIN and DIP. The scores of comprehensive evaluation of water quality increased yearly, indicating that water quality tend to improve from 2011 to 2018.
Key words:  marine environmental sciences  fuzzy comprehensive evaluation  water quality evaluation  Jiulongjiang Estuary

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