Hot spot of CH4 production and diffusive flux in rivers with high urbanization
文献类型：期刊论文
| 作者 | Tang, Wei1 ; Xu, Y. Jun3,4; Ma, Yongmei1; Maher, Damien T.5; Li, Siyue2
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 204页码:11 |
| 关键词 | Riverine dissolved CH4 CH4 diffusive fluxes Urbanization Low-order streams Three Gorges Reservoir (TGR) catchment |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2021.117624 |
| 通讯作者 | Li, Siyue(syli2006@163.com) |
| 英文摘要 | Rivers and streams play a central role in global carbon budget, but our knowledge is limited on the magnitude and extent of urbanization influence on riverine methane (CH4) dynamics. In this study, we investigated dissolved CH4 (dCH(4)) concentration and CH4 diffusive fluxes in 27 river segments of two 4th-order and three 3rd order tributary rivers to the Yangtze River in China, which drained land areas with varied urbanization intensities. We found that urban development was the key factor responsible for high fluvial dCH(4) concentration and diffusive flux, exceeding the influence of agricultural farming, and these headwater rivers were oversaturated in CH4 with respect to atmospheric equilibrium. dCH(4) concentration (3546 +/- 6770 nmol L-1) in the river segments draining higher urban area (20% <= urban land proportion <= 46%) was 5-6 times higher than those (615 +/- 627 nmol L-1 and 764 +/- 708 nmol L-1) in the river segments draining less urban area (0.1% <= urban land proportion < 2% and 2 <= urban land proportion < 20%). River segments draining higher urban area also acted as important sources of CH4 to the atmosphere (8.93 +/- 14.29 mmol m(-2) d(-1)). Total nitrogen (TN) concentration in river water showed the best prediction capacity when compared to other water parameters. Based on urban land use grouping, nutrient elements could predict dCH(4) well in rivers draining higher urban areas (urban >= 2%), which also reflected the lateral input of pollutants (TN, ammonia nitrogen, and total phosphorus). River bottom sediment fraction contributed to trapping organic matter and nutrients as well as to oxic and anoxic conditions, thereby determining reach-scale spatial patterns of dCH(4) concentration. These findings highlight that combining distal geomorphic and hydrologic drivers can be effective in determining the relationship between riverine CH4 and the proximal controls (e.g., nutrients, dissolved oxygen, dissolved organic carbon), as well as in identifying their key drivers. Being rapid urbanization a common feature of catchments worldwide, our results suggest riverine CH4 emissions will increase into the future. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[31670473] ; Youth Innovation Promotion Association of CAS[2020378] ; U.S. Department of Agriculture Hatch Fund project[LAB94459] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000697775900008 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/14322]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Li, Siyue |
| 作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China 2.Wuhan Inst Technol, Sch Environm Ecol & Biol Engn, Res Ctr Environm Ecol & Engn, Wuhan 430205, Peoples R China 3.Louisiana State Univ, Coastal Studies Inst, Baton Rouge, LA 70803 USA 4.Louisiana State Univ, Agr Ctr, Sch Renewable Nat Resources, Baton Rouge, LA 70803 USA 5.Southern Cross Univ, Fac Sci & Engn, Lismore, NSW 2480, Australia |
| 推荐引用方式 GB/T 7714 | Tang, Wei,Xu, Y. Jun,Ma, Yongmei,et al. Hot spot of CH4 production and diffusive flux in rivers with high urbanization[J]. WATER RESEARCH,2021,204:11. |
| APA | Tang, Wei,Xu, Y. Jun,Ma, Yongmei,Maher, Damien T.,&Li, Siyue.(2021).Hot spot of CH4 production and diffusive flux in rivers with high urbanization.WATER RESEARCH,204,11. |
| MLA | Tang, Wei,et al."Hot spot of CH4 production and diffusive flux in rivers with high urbanization".WATER RESEARCH 204(2021):11. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。