摘要
为了解长江河口区南支水域营养状况时空变化及其理化驱动因子,于2019年对该水域水温、溶解氧、总氨氮、亚硝酸盐氮、硝酸盐氮、无机氮、可溶性活性磷酸盐、总氮、总磷、化学需氧量及叶绿素a等水质因子进行采样调查,运用富营养化指数法、营养状态质量指数法和潜在性富营养化评价法对该水域富营养化水平进行分析,采用主成分分析法(PCA)初步确定影响该水域富营养化状况的主要理化驱动因子。结果表明,调查水域水质因子时空分布季节变化显著;营养状态质量指数法与富营养化指数法评价的结果基本一致:调查水域处于重度富营养化水平;潜在性富营养化评价法分析结果是水域富营养化程度高,表现为磷限制,在夏季磷的限制程度进一步加剧;主成分分析结果初步明确影响调查水域富营养化状况的主要理化驱动因子是硝酸盐氮。
The spatial-temporal distribution and variations of eutrophication in southern branch in Yangtze Estuary were analyzed by eutrophication index,nutritional quality index and potential eutrophication based on the investigation data including temperature,dissolved oxygen,ammonia nitrogen,nitrite nitrogen,nitrate nitrogen,dissolved inorganic nitrogen,reactive phosphate,total nitrogen,total phosphate,chemical oxygen demand,and chlorophyll-a on four cruises in 2019.And principal component analysis(PCA)was carried out to evaluate driving physicochemical factors of the eutrophication.The results showed that there were significant seasonal differences in spatial-temporal distribution of water factors;The results of EI and NQI were nearly consistent indicating that the quality has been reached an extremely high level of eutrophication;The potential eutrophication analysis revealed that the investigated area can be characterized by phosphate-limiting moderate-level nutrient,and the level was further enhanced in summer;The driving physicochemical factors determined by PCA was nitrate nitrogen which would impact the eutrophication of the investigated area.
作者
张丹
张玉平
李晓蓓
ZHANG Dan;ZHANG Yuping;LI Xiaobei(Shanghai Fisheries Research Institute,Shanghai 200433,China)
出处
《给水排水》
CSCD
北大核心
2021年第S01期222-229,共8页
Water & Wastewater Engineering
基金
国家自然科学基金青年基金资助项目(51709172)
上海市科技兴农重点攻关项目[沪农科攻字(2015)第6-3-3号]
关键词
长江河口区
富营养化
主成分分析
Yangtze Estuary
Eutrophication
Principal component analysis
作者简介
通信作者:张丹,女,1987年出生,山西人,硕士,工程师。主要研究方向为城市水环境影响评价。通信处:200433上海市杨浦区佳木斯路265号水产研究所2号305室,E-mail:zhangdan0554@163.com
