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How does precipitation recharge groundwater in loess aquifers? Evidence from multiple environmental tracers

文献类型：期刊论文

作者Huang, Tianming3,4,5; Ma, Baoqiang2,4; Pang, Zhonghe4,5; Li, Zhi1; Li, Zhenbin4,5; Long, Yin4,5
刊名JOURNAL OF HYDROLOGY
出版日期2020-04-01
卷号583页码:11
关键词Groundwater recharge Tritium Loess Plateau of China Unsaturated zone Groundwater age Piston flow
ISSN号0022-1694
DOI10.1016/j.jhydrol.2019.124532
英文摘要Characterization of the rainfall infiltration mechanism, whether piston or preferential flow, through an unsaturated zone is necessary for groundwater resource assessment and for analysis of environmental geological hazards. However, several limitations and difficulties remain in determining the infiltration mechanism in arid and semiarid areas. This study combines the evaluations of soil water infiltration characteristics, recharge rate, and determination of groundwater age at a water table in a semiarid loess tableland to examine the recharge processes. The case study is the Xifeng loess tableland in the Loess Plateau of China, which has an unsaturated zone depth of 40-75 m and an obvious 1963-3H peak at a depth of 7.5 m. According to the piston flow, the soil water infiltration velocity is 0.12-0.14 m/yr, corresponding to a recharge rate of 37-41 mm/yr, based on the 1963-3H peak and chloride mass balance method. All of the groundwater from the water table and wells is old (tritium-free), with ages ranging from hundreds of years to 20,000 years, which suggests that no rapid modern recharge has occurred since the 1950s. The chloride content of soil water in the deep unsaturated zone, with an average value of 10.8 mg/L in the unsaturated zone below 30 m, overlaps with that in groundwater, at 4.0-10.9 mg/L. The comprehensive isotopic and chemical compositions for soil water and groundwater showed that piston flow was dominant during soil water infiltration at the field scale, resulting in the delay of modern water and related solutes entering the groundwater. Combined evaluations of the unsaturated zone with those of the saturated zone and the use of multiple environmental tracers, such as Cl, Br, H-2, O-18, C-13, H-3 and C-14, can be regarded as a generic framework for studying the recharge processes in arid and semiarid areas with thick unsaturated zones at macroscopic and field scales.
WOS关键词PREFERENTIAL FLOW ; UNSATURATED ZONE ; SOIL-WATER ; STABLE-ISOTOPE ; SOLUTE TRANSPORT ; MASS-BALANCE ; VADOSE ZONE ; TRITIUM ; MOVEMENT ; PLATEAU
资助项目National Natural Science Foundation of China[41672254] ; National Natural Science Foundation of China[41877207] ; National Natural Science Foundation of China[41727901] ; Youth Innovation Promotion Association CAS[2018087] ; CAS scholarship[201825]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:000527388300044
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; CAS scholarship ; CAS scholarship ; CAS scholarship ; CAS scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; CAS scholarship ; CAS scholarship ; CAS scholarship ; CAS scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; CAS scholarship ; CAS scholarship ; CAS scholarship ; CAS scholarship ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; CAS scholarship ; CAS scholarship ; CAS scholarship ; CAS scholarship
源URL[http://ir.iggcas.ac.cn/handle/132A11/96224]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Pang, Zhonghe
作者单位1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
2.China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing 100083, Peoples R China
3.Univ Calgary, Dept Geosci, Calgary, AB T2N 1N4, Canada
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Tianming,Ma, Baoqiang,Pang, Zhonghe,et al. How does precipitation recharge groundwater in loess aquifers? Evidence from multiple environmental tracers[J]. JOURNAL OF HYDROLOGY,2020,583:11.
APA Huang, Tianming,Ma, Baoqiang,Pang, Zhonghe,Li, Zhi,Li, Zhenbin,&Long, Yin.(2020).How does precipitation recharge groundwater in loess aquifers? Evidence from multiple environmental tracers.JOURNAL OF HYDROLOGY,583,11.
MLA Huang, Tianming,et al."How does precipitation recharge groundwater in loess aquifers? Evidence from multiple environmental tracers".JOURNAL OF HYDROLOGY 583(2020):11.

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来源：地质与地球物理研究所

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