Trends in total nitrogen concentrations in the Three Rivers Headwater Region
文献类型：期刊论文
| 作者 | Li, Ying3,4; Li, Baolin3,4,5; Yuan, Yecheng3,4; Lei, Qiuliang1; Jiang, Yuhao2; Liu, Yan3,4; Li, Rui3,4; Liu, Wei3,4; Zhai, Dechao3,4; Xu, Jie2 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2022-12-15 |
| 卷号 | 852页码:11 |
| ISSN号 | 0048-9697 |
| 关键词 | Total nitrogen Surface water In fluence factors Three Rivers Headwater Region |
| DOI | 10.1016/j.scitotenv.2022.158462 |
| 通讯作者 | Li, Baolin(libl@lreis.ac.cn) |
| 英文摘要 | It is important to protect the quality of the water in the Three Rivers Headwater Region (TRHR), known as the water tower of China, to guarantee the water security in downstream areas. However, because of a lack of long-term studies that span wide geographical areas, it is difficult to understand how the water resource in the TRHR should be protected. In this paper, we report the findings from our analysis of total nitrogen (TN) concentration data from 39 river monitoring stations for the period from 2012 to 2018. The water quality status was evaluated by comparing the concentrations with the national standards and calculating exceedance ratios for surface water. Trends were calculated with ordinary linear least-squares regression and a weighted leastsquares (WLS) meta-analysis method. The results showed that the annual average TN concentrations in the TRHR rivers from 2012 to 2018 ranged from 0.68 to 1.06 mg/L, and were lower than those in the downstream reaches but higher than the global average in natural river waters. For the period from 2012 to 2018, the TN concentrations showed a highly significant increase (0.03 mg/L/year) across the entire TRHR and were increasing and decreasing at 71.8 % and 28.2 % of the stations, respectively. From the trend results, we divided the study area into two zones, one with increasing TN concentrations and one with decreasing TN concentrations. It is found that environmental factors had little influence on TN concentrations in the increasing and decreasing areas, but artificial factors such as population and restoration project areas contributed to the increases in TN concentrations in the increasing area. The TRHR remains a source of clean water in China; however, the water quality should be monitored closely, and measures should be implemented to protect the resource and mitigate the disturbances caused by human activities. |
| WOS关键词 | QINGHAI-TIBET PLATEAU ; CLIMATE-CHANGE ; YELLOW-RIVER ; WATER ; IMPACTS ; CARBON ; RESTORATION ; DEGRADATION ; PHOSPHORUS ; DEPOSITION |
| 资助项目 | National Natural Science Foundation of China[U20A20114] ; National Key Research and Development Program of China[2016YFC0500205] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000863084500005 |
| 资助机构 | National Natural Science Foundation of China ; National Key Research and Development Program of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/185099]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Baolin |
| 作者单位 | 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Nonpoint Source Pollut Control, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China 2.Natl Forestry & Grassland Adm, Acad Forest Inventory & Planning, Beijing 100714, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Jiangsu Ctr Collaborat Innovat Geog Informat Resou, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ying,Li, Baolin,Yuan, Yecheng,et al. Trends in total nitrogen concentrations in the Three Rivers Headwater Region[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,852:11. |
| APA | Li, Ying.,Li, Baolin.,Yuan, Yecheng.,Lei, Qiuliang.,Jiang, Yuhao.,...&Xu, Jie.(2022).Trends in total nitrogen concentrations in the Three Rivers Headwater Region.SCIENCE OF THE TOTAL ENVIRONMENT,852,11. |
| MLA | Li, Ying,et al."Trends in total nitrogen concentrations in the Three Rivers Headwater Region".SCIENCE OF THE TOTAL ENVIRONMENT 852(2022):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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