文献类型：期刊文献

英文题名：Spatiotemporal river flux and composition of nutrients affecting adjacent coastal water quality in Hainan Island, China

作者：Zhang, Peng[1,2];Ruan, Huaming[1];Dai, Peidong[1];Zhao, Lirong[1,2];Zhang, Jibiao[1,2]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm Sci, Zhanjiang 524088, Guangdong, Peoples R China;[2]Southern Lab Ocean Sci & Engn Guangdong Zhanjiang, Zhanjiang 524088, Peoples R China

年份：2020

卷号：591

外文期刊名：JOURNAL OF HYDROLOGY

收录：SCI-EXPANDED(收录号：WOS:000599757800021)、、EI(收录号：20203008975462)、Scopus(收录号：2-s2.0-85088384093)、WOS

基金：We deeply appreciate the journal editors and the anonymous reviewers for their constructive comments and suggestions. This study was funded by the Fund of Guangdong Ocean University. We gratefully acknowledge supported by Guangdong Ocean University Fund Project (R18021); The Science and Technology Special Project of Zhanjiang city (2019B01081), China; The First-class Special Fund (231419018) and the Innovation Strong School Project (230420021) of Guangdong Ocean University.

语种：英文

外文关键词：Spatiotemporal variation; Riverine nutrient flux; Coastal water quality; Hainan Island

外文摘要：Human activities have changed global nutrients cycling and appreciably altered marine ecosystems in riverine-estuarine systems. This is evident by the significant shifts in the supply of nitrogen and phosphorus. However, very little is known about the concentrations and fluxes and of these nutrients and their seasonal changes in Hainan Island, China. We examined Hainan Island, which is the second largest island in China, to assess the spatiotemporal concentrations and fluxes of nutrients using seasonal data on a whole-of-system scale covering river estuaries and adjacent coastal water (2017). The annual average total dissolved nitrogen (TDN) and total dissolved phosphorus (TDP) concentrations were 77.23 +/- 31.36 mu mol/L and 3.25 +/- 1.67 mu mol/L, respectively. The annual fluxes of pollutants from the discharge of coastal rivers on Hainan Island into coastal waters were 1.8 x 10(4) t for TDN and 1.1 x 10(3) t for TDP, respectively. The month with the largest contribution to the annual pollutants load was October, which contributed 13.60% of TDN and 17.79% of TDP. In addition, the largest river fluxes were Nandu River, which contributed 7.5 x 10(3) t of TDN and 364 t of TDP. The annual average concentrations of pollutants in the surface coastal water were 7.60 +/- 10.71 mu mol/L for dissolved inorganic nitrogen (DIN) and 0.24 +/- 0.31 mu mol/L for dissolved inorganic phosphorus (DIP). The annual average N/P ratios in coastal rivers and seawater were 30 and 65, which were significantly higher than the Redfield ratio (N/P = 16). The DIN and DIP concentrations of most monitoring stations ma the national firstclass seawater standards, but the problem of nutrient pollution in some local coastal water areas was still outstanding. The coastal water quality monitoring should consider the influence of tropical storms influence on Hainan Island. The effective improvement of coastal water quality should be based on land-ocean coordination monitoring of coastal water quality and the riverine nutrient flux of Hainan Island.