Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028413 |
Groundwater Isotopes Biased Toward Heavy Rainfall Events and Implications on the Local Meteoric Water Line | |
Li, Jie1,2; Pang, Zhonghe1,2,3; Kong, Yanlong1,2,3; Wang, Shufang4; Bai, Guoying5; Zhao, Hongyi5; Zhou, Dong5; Sun, Feng5; Yang, Zhongshan5 | |
2018-06-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:11页码:6259-6266 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Stable water isotopes are useful tracers in the groundwater recharge studies, where the local meteoric water line (LMWL) usually serves as a reference line and the amount-weighted average value of precipitation is regarded as the input meteoric signal. Based on a comparison of isotope composition between precipitation and groundwater collected from a groundwater basin in the Beijing area, we verify that small precipitation events do not constitute effective groundwater recharge in a (semi) arid region, causing that the isotopes in groundwater are biased toward the meteoric isotopic signal of heavy rainfall events. The positive deflections in groundwater levels from a phreatic aquifer in Yanqing Basin in the Northwest of Beijing revealed that recharge occurs exclusively during the rainy seasons and is clearly associated with heavy rainfall events (>10mm/day). The isotope composition of groundwater samples that plot far below the mean meteoric input value, further strengthen the dependence of groundwater recharge on heavy rainfall events. We construct the LMWLs with different regression methods using daily stable isotope data from seven hydro-meteorological stations over a hydrological year. When the delta O-18 ranges from -20% to 10%, the lines are quite similar regressed by the weighted monthly values and by heavy rainfall events, so the conventional LMWL can still serve as the reference line for groundwater recharge studies. |
英文关键词 | groundwater recharge heavy rainfall isotopes LMWL amount threshold |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000436110800030 |
WOS关键词 | STABLE-ISOTOPES ; BALANCE MODEL ; PRECIPITATION ; RECHARGE ; CHEMISTRY ; CHAOBAI ; BASIN |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33941 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing, Peoples R China; 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China; 4.Beijing Inst Hydrogeol & Engn Geol, Beijing, Peoples R China; 5.Beijing Hydrol Ctr, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Jie,Pang, Zhonghe,Kong, Yanlong,et al. Groundwater Isotopes Biased Toward Heavy Rainfall Events and Implications on the Local Meteoric Water Line[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(11):6259-6266. |
APA | Li, Jie.,Pang, Zhonghe.,Kong, Yanlong.,Wang, Shufang.,Bai, Guoying.,...&Yang, Zhongshan.(2018).Groundwater Isotopes Biased Toward Heavy Rainfall Events and Implications on the Local Meteoric Water Line.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(11),6259-6266. |
MLA | Li, Jie,et al."Groundwater Isotopes Biased Toward Heavy Rainfall Events and Implications on the Local Meteoric Water Line".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.11(2018):6259-6266. |
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