Determination of groundwater recharge processes and evaluation of the 'two water worlds' hypothesis at a check dam on the Loess Plateau
文献类型：期刊论文
| 作者 | Zhao, Ying1,2; Wang, Li1,3 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2021-04-01 |
| 卷号 | 595页码:13 |
| 关键词 | Stable isotope Groundwater recharge mechanism Preferential flow Matrix flow |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2021.125989 |
| 通讯作者 | Wang, Li(wangli5208@nwsuaf.edu.cn) |
| 英文摘要 | Areas with shallow groundwater and check dams have relatively abundant water resources compared to tablelands with deep loess layers on the Loess Plateau in China, but little attention has been paid to their potentially substantial role in groundwater recharge to date. In addition, during groundwater recharge preferential flow through macropores can replenish groundwater quickly, leaving immobile bound water relatively unmixed. Different water paths result in the separation of groundwater and plant xylem water isotopic signals, according to the 'two water worlds' (TWW) hypothesis. The hypothesis has received wide attention in the last decade due to observations of stronger H-2 and O-18 enrichment (higher delta H-2 and delta O-18 values) in plant xylem water than in groundwater. Thus, aims of this study were to analyze processes involved in groundwater recharge and evaluate the TWW hypothesis by isotope (delta H-2 and delta O-18) tracing at a check dam on the Loess Plateau. We report three main findings. First, the groundwater table began to rise 35 days after the first large rain event during our study period, showing that recharge times at the site are orders of magnitude shorter than those in tablelands of the Loess Plateau (decades or hundreds of years). Second, preferential and matrix flows contributed 36% and 64%, respectively, of the total recharge. Third, when preferential flow prevailed, no significant isotopic differences between any measured water sources were found at the check-dammed site (e.g. precipitation, soil water, groundwater and plant xylem water) (p > 0.05), which conflicts with isotopic patterns predicted by the TWW hypothesis. In conclusion, check dams in areas with shallow groundwater can substantially promote water cycling from precipitation to groundwater on the Loess Plateau and in similar areas. This study also provides a link between hydrological and ecological processes (groundwater recharge paths and plant water uptake), with significant implications for fundamental ecohydrological understanding and practical hydrological predictions. |
| WOS关键词 | SOIL-WATER ; PLANT WATER ; UNSATURATED ZONE ; STABLE-ISOTOPES ; CHINA ; MECHANISMS ; SEPARATION ; MOISTURE ; FLOW ; TRANSPIRATION |
| 资助项目 | National Natural Science Foundation of China[41771545] ; National Natural Science Foundation of China[41977012] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG1718] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000641592600041 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/162838]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Li |
| 作者单位 | 1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Ying,Wang, Li. Determination of groundwater recharge processes and evaluation of the 'two water worlds' hypothesis at a check dam on the Loess Plateau[J]. JOURNAL OF HYDROLOGY,2021,595:13. |
| APA | Zhao, Ying,&Wang, Li.(2021).Determination of groundwater recharge processes and evaluation of the 'two water worlds' hypothesis at a check dam on the Loess Plateau.JOURNAL OF HYDROLOGY,595,13. |
| MLA | Zhao, Ying,et al."Determination of groundwater recharge processes and evaluation of the 'two water worlds' hypothesis at a check dam on the Loess Plateau".JOURNAL OF HYDROLOGY 595(2021):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。