Arid
DOI10.1007/s10040-017-1599-8
Groundwater recharge mechanism in an integrated tableland of the Loess Plateau, northern China: insights from environmental tracers
Huang, Tianming1,2; Pang, Zhonghe1,2; Liu, Jilai3; Ma, Jinzhu4; Gates, John5
通讯作者Pang, Zhonghe
来源期刊HYDROGEOLOGY JOURNAL
ISSN1431-2174
EISSN1435-0157
出版年2017
卷号25期号:7页码:2049-2065
英文摘要

Assessing groundwater recharge characteristics (recharge rate, history, mechanisms (piston and preferential flow)) and groundwater age in arid and semi-arid environments remains a difficult but important research frontier. Such assessments are particularly important when the unsaturated zone (UZ) is thick and the recharge rate is limited. This study combined evaluations of the thick UZ with those of the saturated zone and used multiple tracers, such as Cl, NO3, Br, H-2, O-18, C-13, H-3 and C-14, to study groundwater recharge characteristics in an integrated loess tableland in the Loess Plateau, China, where precipitation infiltration is the only recharge source for shallow groundwater. The results indicate that diffuse recharge beneath crops, as the main land use of the study area, is 55-71 mm yr(-1) based on the chloride mass balance of soil profiles. The length of time required for annual precipitation to reach the water table is 160-400 yrs. The groundwater is all pre-modern water and paleowater, with corrected C-14 age ranging from 136 to 23,412 yrs. Most of the water that eventually becomes recharge originally infiltrated in July-September. The Cl and NO3 contents in the upper UZ are considerably higher than those in the deep UZ and shallow groundwater because of recent human activities. The shallow groundwater has not been in hydraulic equilibrium with present near-surface boundary conditions. The homogeneous material of the UZ and relatively old groundwater age imply that piston flow is the dominant recharge mechanism for the shallow groundwater in the tableland.


英文关键词China Groundwater recharge/water budget Unsaturated zone Groundwater age Piston flow
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000413970900010
WOS关键词DEEP UNSATURATED ZONE ; LAND-USE CHANGE ; ISOTOPIC COMPOSITION ; ARID REGIONS ; SOIL-PROFILE ; NITRATE CONCENTRATIONS ; AMARGOSA DESERT ; WATER-RESOURCE ; C-14 ACTIVITY ; CHLORIDE
WOS类目Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Geology ; Water Resources
来源机构兰州大学 ; 中国科学院地质与地球物理研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199465
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China;
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
3.China Univ Min Technol, Coll Geosci & Surveying Engn, Beijing 100083, Peoples R China;
4.Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Gansu, Peoples R China;
5.Climate Corp, San Francisco, CA 94103 USA
推荐引用方式
GB/T 7714
Huang, Tianming,Pang, Zhonghe,Liu, Jilai,et al. Groundwater recharge mechanism in an integrated tableland of the Loess Plateau, northern China: insights from environmental tracers[J]. 兰州大学, 中国科学院地质与地球物理研究所,2017,25(7):2049-2065.
APA Huang, Tianming,Pang, Zhonghe,Liu, Jilai,Ma, Jinzhu,&Gates, John.(2017).Groundwater recharge mechanism in an integrated tableland of the Loess Plateau, northern China: insights from environmental tracers.HYDROGEOLOGY JOURNAL,25(7),2049-2065.
MLA Huang, Tianming,et al."Groundwater recharge mechanism in an integrated tableland of the Loess Plateau, northern China: insights from environmental tracers".HYDROGEOLOGY JOURNAL 25.7(2017):2049-2065.
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