海洋地质前沿2024，Vol.40Issue(6)：39-52,14.DOI:10.16028/j.1009-2722.2023.086
杭州湾及其邻近海域夏季营养盐污染与富营养化评价
Assessment of nutrient pollution and eutrophication in Hangzhou Bay and its adjacent waters in summer
摘要
Abstract
Based on the ecological environment survey data of Hangzhou Bay and its adjacent waters in summer 2022,by using the single factor pollution index method,nutrient structure and limitation analysis,and eutrophica-tion status index method,the characteristics of surface nutrient and organic pollution in the bay were systematic-ally studied,and the eutrophication status was evaluated.Through the Pearson correlation statistical analysis,the impact of nutrient pollution on the growth of phytoplankton and the control factors of eutrophication in water bod-ies were preliminarily explored.Results indicate that the pollution of nitrogen(N)and phosphorus(P)nutrients in the region was relatively severe.55％and 80％of the stations in which dissolved inorganic nitrogen(DIN)and dissolved inorganic phosphorus(DIP)content exceeded China's national Class Ⅲ seawater quality benchmarks,respectively.The N/P and Si/P ratios of surface seawater were imbalanced,and 20％and 5％of the stations showed potential limitations of P and Si on the growth of phytoplankton,respectively The chlorophyll a(Chl a)content was mainly affected by the transparency of the water body,showing a spatial distribution characteristic:higher in the east than in the west,and higher outside the bay than inside the bay.The Chl a content in the eastern waters outside the bay was relatively high,indicating a high density of algae cells and a risk of red tide outbreaks.The survey results of chemical oxygen demand(COD)indicate that the overall organic pollution in the area is not significant,and 95％of the stations could meet China's national Class Ⅲ water quality benchmarks.Results of the eutrophication assessment indicate that 90％of the stations in the area were in eutrophication state(40％were severely eutrophicated).The order of contribution to the eutrophication was COD>DIN>DIP.Preliminary stud-ies have shown that N and P nutrient pollution still exists in the Hangzhou Bay and its adjacent waters,and the eu-trophication of water bodies deserves attention and further research is needed.关键词
杭州湾/营养盐/富营养化/浮游植物/影响因素Key words
Hangzhou Bay/nutrients/eutrophication/phytoplankton/influencing factor分类
海洋科学引用本文复制引用
李赛赛,裴绍峰,赵俐红,朱志强,廖名稳,段云莹..杭州湾及其邻近海域夏季营养盐污染与富营养化评价[J].海洋地质前沿,2024,40(6):39-52,14.基金项目
国家自然科学基金(42376203、41306175) （42376203、41306175）
中国科学院海洋地质与环境重点实验室开放基金(MGE2021KG12) （MGE2021KG12）
崂山实验室科技创新项目(LSKJ202204400) （LSKJ202204400）
中国地质调查局项目(DD20221724) （DD20221724）
