干旱区生态环境知识资源中心(Arid): The role of unsaturated zone in estimating groundwater recharge in arid and semiarid areas as depicted by geochemical tracers

Arid

DOI	10.1051/e3sconf/20199812007
	The role of unsaturated zone in estimating groundwater recharge in arid and semiarid areas as depicted by geochemical tracers
	Huang, Tianming; Ma, Baoqiang; Long, Yin; Pang, Zhonghe
通讯作者	Huang, TM (corresponding author), Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China. ; Huang, TM (corresponding author), Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China.
会议名称	16th International Symposium on Water-Rock Interaction (WRI) / 13th International Symposium on Applied Isotope Geochemistry / 1st IAGC International Conference
会议日期	JUL 21-26, 2019
会议地点	Tomsk, RUSSIA
英文摘要	In arid and semiarid area, the recharge rate is relatively limited and the unsaturated zone (UZ) is commonly thick. The moisture in the UZ may represent the water infiltrating from precipitation during the past decades to thousands of years. Therefore, the multiple geochemical tracers in soil moisture, including Cl (chloride mass balance), 3H (tritium peak displacement), NO3, H-2, O-18, can be used to estimate diffuse recharge rate and related recharge characteristics. Based on 45 UZ profiles with maximum depth of 62 m in the Ordos Basin in NW China, a typical arid and semiarid area, we has used multiple geochemical tracers to study the following recharge informations: (1) reconstruction of groundwater recharge history, (2) determination of groundwater recharge mechanism, and (3) assessment of impact of vegetation changes on groundwater recharge. The results show that the soil texture (epically the shallow soil), vegetation and precipitation mainly control the recharge rate. This study also found that shallow groundwater in arid and semiarid areas is often not in equilibrium with near-surface boundary conditions. To estimate present recharge information, the UZ must be considered. The whole recharge process from precipitation to groundwater cannot be well understood unless the UZ have been included in arid and semiarid areas.
来源出版物	16TH INTERNATIONAL SYMPOSIUM ON WATER-ROCK INTERACTION (WRI-16) AND 13TH INTERNATIONAL SYMPOSIUM ON APPLIED ISOTOPE GEOCHEMISTRY (1ST IAGC INTERNATIONAL CONFERENCE)
ISSN	2267-1242
出版年	2019
卷号	98
出版者	E D P SCIENCES
类型	Proceedings Paper
语种	英语
开放获取类型	gold, Green Published
收录类别	CPCI-S
WOS记录号	WOS:000503479200226
WOS关键词	PROFILE
WOS类目	Geochemistry & Geophysics ; Engineering, Petroleum ; Environmental Sciences ; Geology ; Water Resources
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/370155
作者单位	[Huang, Tianming; Ma, Baoqiang; Long, Yin; Pang, Zhonghe] Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China; [Huang, Tianming; Long, Yin; Pang, Zhonghe] Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China; [Ma, Baoqiang] China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Huang, Tianming,Ma, Baoqiang,Long, Yin,et al. The role of unsaturated zone in estimating groundwater recharge in arid and semiarid areas as depicted by geochemical tracers[C]:E D P SCIENCES,2019.