Groundwater Recharge and Mixing in Arid and Semiarid Regions: Heihe   River Basin, Northwest China

doi:10.1111/1755-6724.12738

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	Groundwater Recharge and Mixing in Arid and Semiarid Regions: Heihe River Basin, Northwest China
	Cao Guoliang ; Zheng Chunmiao ; Simmons, Craig T.
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2016
关键词	Heihe River Basin groundwater recharge groundwater mixing isotope hydrology BADAIN JARAN DESERT ZHANGYE BASIN SURFACE-WATER HYDROCHEMICAL CHARACTERISTICS HYDROGEOCHEMICAL EVOLUTION IRRIGATION WATER NORTHERN CHINA INNER-MONGOLIA MINQIN BASIN ENVIRONMENT
DOI	10.1111/1755-6724.12738
英文摘要	A sound understanding of groundwater recharged from various sources occurring at different time scales is crucial for water management in arid and semi-arid river basins. Groundwater recharge sources and their geochemical evolution are investigated for the Heihe River Basin (HRB) in northwest China on the basis of a comprehensive compilation of geochemical and isotopic data. Geochemical mass balance modeling indicates that mountain-block recharge accounts for a small fraction (generally less than 5%) of the shallow and deep groundwater sustaining the oasis, whereas infiltration of rivers and irrigation water contribute most of the groundwater recharge. Dedolomitization is the primary process responsible for the changes in groundwater chemical and carbon isotope compositions from the piedmont to the groundwater discharge zone, where the dedolomitization is very likely enhanced by modern agricultural activities affecting the shallow groundwater quality. Analysis of radioactive isotopes suggests that these primary recharge sources occur at two different time scales. Radiocarbon-derived groundwater age profiles indicate a recharge rate of approximately 12 mm/year, which probably occurred during 2000-7000 years B.P., corresponding to the mid-Holocene humid period. The recharge of young groundwater on the tritium-dated time scale is much higher, about 360 mm/year in the oasis region. Infiltration from irrigation canals and irrigation return flow are the primary contributors to the increased young groundwater recharge. This study suggests that groundwater chemistry in the HRB has been influenced by the complex interaction between natural and human-induced geochemical processes and that anthropogenic effects have played a more significant role in terms of both groundwater quantity and quality.; the National Natural Science Foundation of China; SCI(E); ARTICLE; glcao@coe.pku.edu.cn; zhengcm@sustc.edu.cn; 3; 971-987; 90
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/492187]
专题	工学院
推荐引用方式 GB/T 7714	Cao Guoliang,Zheng Chunmiao,Simmons, Craig T.. Groundwater Recharge and Mixing in Arid and Semiarid Regions: Heihe River Basin, Northwest China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2016.
APA	Cao Guoliang,Zheng Chunmiao,&Simmons, Craig T..(2016).Groundwater Recharge and Mixing in Arid and Semiarid Regions: Heihe River Basin, Northwest China.ACTA GEOLOGICA SINICA-ENGLISH EDITION.
MLA	Cao Guoliang,et al."Groundwater Recharge and Mixing in Arid and Semiarid Regions: Heihe River Basin, Northwest China".ACTA GEOLOGICA SINICA-ENGLISH EDITION (2016).