干旱区生态环境知识资源中心(Arid): Groundwater Origin in Qanats, Chemo-Isotopic, and Hydrogeological Evidence

Arid

DOI	10.1111/gwat.12975
	Groundwater Origin in Qanats, Chemo-Isotopic, and Hydrogeological Evidence
	Moghadam, Hojat Mirani; Bagheri, Rahim; Karami, Gholam Hossein; Jafari, Hadi
通讯作者	Bagheri, Rahim
来源期刊	GROUNDWATER
ISSN	0017-467X
EISSN	1745-6584
出版年	2020
卷号	58 期号:5 页码:771-776
英文摘要	A systematic study of the chemo-isotopic characteristics and origin of the groundwater was carried out at six major qanats in the hyper-arid Gonabad area, eastern Iran. These qanats as a sustainable groundwater extraction technology have a long history, supporting human life for more than a thousand years in this region. The Gonabad qanats are characterized by outlet electrical conductivity (EC) values of 750 to 3900 mu S/cm and HCO3-Na-Mg and Cl-Na water types. The Gonabad meteoric water line (G(n)MWL) was drawn at the local scale as delta H-2 = 6.32x delta O-18 + 8.35 (with R-2 = 0.90). It has a lower slope and intercept than the global meteoric water line due to different water vapor sources and isotope kinetic fractionation effects during precipitation in this arid region. The altitude effects on isotopic content of precipitation data were derived as delta O-18 = (-0.0031 x H-(m.a.s.l))-1.3). The delta H-2 and delta O-18 isotopes signatures demonstrate a meteoric origin of the groundwater of these qanats. The shift of the qanat's water samples from the local meteoric water line (LMWL) in a dry period with higher temperatures is most probably due to evaporation during the infiltration process and water movement in qanat gallery. Based on the isotopic results and mass balance calculations, the qanats are locally recharged from an area between 2000 to 2400 m.a.s.l of nearby carbonate formations and coarse alluvial sediments. The dissolution of evaporate interlayers in Neogene deposits deteriorates the groundwater quality, especially in Baidokht qanat.
类型	Article
语种	英语
国家	Iran
收录类别	SCI-E
WOS记录号	WOS:000505864100001
WOS关键词	MOISTURE ORIGIN ; PRECIPITATION
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
EI主题词	2020-01-07
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312405
作者单位	Shahrood Univ Technol, Fac Earth Sci, Tehran St, Shahrood 3619995161, Iran
推荐引用方式 GB/T 7714	Moghadam, Hojat Mirani,Bagheri, Rahim,Karami, Gholam Hossein,et al. Groundwater Origin in Qanats, Chemo-Isotopic, and Hydrogeological Evidence[J],2020,58(5):771-776.
APA	Moghadam, Hojat Mirani,Bagheri, Rahim,Karami, Gholam Hossein,&Jafari, Hadi.(2020).Groundwater Origin in Qanats, Chemo-Isotopic, and Hydrogeological Evidence.GROUNDWATER,58(5),771-776.
MLA	Moghadam, Hojat Mirani,et al."Groundwater Origin in Qanats, Chemo-Isotopic, and Hydrogeological Evidence".GROUNDWATER 58.5(2020):771-776.