| 摘要: |
| 河口营养物基准是河口营养状态参数对生态环境不产生不良或有害影响的最大阈值。本文首先基于2015—2018年长江口环境现场调查数据开展河口内部分区，再通过主成分分析、相关性分析和线性回归分析等方法，筛选长江口营养物基准关键指标，之后采用频数分布法和压力-响应模型法得出基准推荐值，最后将赤潮优势藻培养实验得到的生态响应值作为参考。结果表明：根据盐度分布与地形特征，长江口可分为口门区和口外区两个生态区。可溶性无机氮（dissolved inorganic nitrogen，DIN）和可溶性活性磷酸盐（soluble reactive phosphorus，SRP）是制定长江口营养物基准的关键指标。口门区DIN和SRP的基准推荐值分别为0.614和0.029mg/L，口外区基准推荐值分别为0.295和0.008 mg/L。该结果有望为长江口富营养化评估和营养物标准制定等环境管理工作提供科学依据。 |
| 关键词: 长江口 水质基准 频数分布法 压力-响应模型 富营养化 |
| DOI：10.11693/hyhz20200400109 |
| 分类号: |
| 基金项目:国家水体污染控制与治理科技重大专项，2017ZX07301-002号 |
附件 |
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| WATER QUALITY CRITERIA OF DISSOLVED INORGANIC NITROGEN AND SOLUBLE REACTIVE PHOSPHORUS IN CHANGJIANG RIVER ESTUARY |
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WU Ya-Nan1, ZHANG Hao-Fei2,3, WANG Lu4, LI Zheng-Yan1,5
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1.College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;2.East China Sea Environment Monitoring Center, SOA, Shanghai 201206, China;3.Key Laboratory of Marine Ecological Monitoring and Restoration Technology, Ministry of Natural Resources, Shanghai 201206, China;4.Chinese Research Academy of Environmental Sciences, Beijing 100012, China;5.Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Qingdao 266100, China
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| Abstract: |
| The estuarine nutrient criterion is the maximum threshold value for which the estuarine nutrient state parameters do not produce adverse or harmful effects on the ecological environment. In this study, based on the 2015—2018 environmental survey data of the Changjiang (Yangtze) River estuary, first, the internal division of the estuary was carried out. Secondly, through the principal component analysis, correlation analysis, and linear regression analysis methods, the key indicators of nutrition criterion were selected for the Changjiang River estuary, and then using the frequency distribution method and pressure-response model method, the recommended criterion values were obtained. Finally, the ecological response values of dominant harmful algal bloom species were obtained through laboratory experiments as reference values. Results show that according to the salinity distribution and geographic characteristics, the estuary could be divided into two ecological areas: the mouth area and the outside-mouth area. DIN (dissolvable inorganic nitrogen) and SRP (soluble reactive phosphorus) are key indicators to the formulation of nutrient benchmarks in the estuary. The recommended values of DIN and SRP were 0.614 and 0.029mg/L for the mouth area, and 0.295 and 0.008mg/L for the outside-mouth area, respectively. Results are expected to provide a scientific basis for environmental management such as eutrophication assessment and formulation of nutrient standards in the Changjiang River estuary. |
| Key words: Changjiang (Yangtze) River estuary water quality criteria frequency distribution method pressure-response model eutrophication |
