文献类型：期刊文献

英文题名：Characteristics of surface water quality and stable isotopes in Bamen Bay watershed, Hainan Province, China

作者：Guo, Julan[1,2] Yu, Yilei[1,2] Wu, Gaojie[1,2] Ma, Muyuan[1,2]

第一作者：郭菊兰;Guo, Julan

通信作者：Yu, YL[1];Yu, YL[2]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing, Peoples R China;[2]Beijing Key Lab Wetland Serv & Restorat, Beijing, Peoples R China

年份：2021

卷号：16

期号：1

外文期刊名：PLOS ONE

收录：;Scopus(收录号：2-s2.0-85100001962);WOS:【SCI-EXPANDED(收录号:WOS:000612929300124)】；

基金：This research was financially supported by National Forestry Industry Research Special Funds for Public Welfare Projects (No. 201504419) and the National Natural Science Foundation of China (NO. 41601037). Julan Guo hosts the first project and Yilei Yu hosts the second one. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.; The authors would also like to thank Ministry of Natural Resource of the People's Republic of China, Landsat for the data and support. Website are as follows: http://www.mnr.gov.cn/and http://landsat.visibleearth.nasa.gov/.We wish to thank all the anonymous reviewers for their invaluable comments and constructive suggestions that were used to improve the quality of the manuscript. All authors read and approved the final manuscript.

语种：英文

摘要：Bamen Bay is located at the intersection of the Wenjiao River and Wenchang River in Hainan Province (China), where mangroves have been facing a threat of water quality deterioration. Therefore, it is imperative to study the characteristics of the surface water quality on a watershed scale. Water samples were collected three times from 36 monitoring sites from 2015 to 2016. It was found that nitrate was the main inorganic nitrogen form and all the surface water types were alkaline. Meanwhile, aquaculture water had high content of nitrogen, total phosphorus, chlorophyll a (Chl.a), total organic carbon (TOC), and chemical oxygen demand (COD). Significant spatial and temporal variations were found for most parameters. However, stable isotopes of delta D and delta O-18 indicated that river water mainly originated from atmospheric precipitation and experienced strong evaporation. The water chemistry and isotopes of the Bamen Bay, mangroves, and aquaculture water were initially affected by the mixing of fresh water and seawater, followed by evaporation. The river and reservoir water chemistry were mainly controlled by water-rock interactions and cation exchange as deduced from the ionic relationships and Gibbs plots. These interactions involved the dissolution of calcite-, bicarbonate-, carbonate-, and calcium-containing minerals. Oxidized environments (river, reservoir, and Bamen Bay) were conducive for nitrification, while anaerobic conditions (mangrove and aquaculture water) were beneficial to the reduced nitrogen forms.