干旱区生态环境知识资源中心(Arid): Groundwater mounding: A diagnostic feature for mapping aquifer connectivity in hyper-arid deserts

Arid

DOI	10.1016/j.scitotenv.2021.149760
	Groundwater mounding: A diagnostic feature for mapping aquifer connectivity in hyper-arid deserts
	Abotalib, Abotalib Z.; Heggy, Essam; El Bastawesy, Mohammed; Ismail, Esam; Gad, Ahmed; Attwa, Mohamed
通讯作者	Heggy, E (corresponding author), Univ Southern Calif, Viterbi Sch Engn, Los Angeles, CA 90007 USA.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2021
卷号	801
英文摘要	Shallow aquifer mapping and large-scale characterization of groundwater dynamics in the Saharan-Arabian Desert is largely impeded by the limited hydrological datasets from sparse and unevenly distributed well logs. Today, as these aquifers are depleting at alarming rates in response to climatic and anthropogenic stresses, accurate knowledge of their dynamical characteristics is not only essential for understanding the water deficit in these increasingly populated areas but also to understand the regional and global environmental impacts of such changes. Herein, we suggest that groundwater mounding can be used for assessing aquifer connectivity in hyper-arid deserts. Using the shallow Post Nubian Aquifer System (PNAS) in Egypt as a test site, we integrate remote sensing, isotopic, hydrochemical and geoelectrical methods to characterize the Saharan groundwater mounds, examine the structural control on groundwater dynamics and discuss the potential of future satellite missions to characterize aquifer connectivity. The results suggest that groundwater mounding in the PNAS is attributed to artesian discharge of the deep Nubian Aquifer System (NAS) along the intersection of WNW and E-W major faults. This is evident by the dominant isotopic signature (delta O-18: -9.93 parts per thousand; delta H-2: -79.05) of the deep NAS in the shallow PNAS with a percentage of up to 85% in the faulted zone. The 2D-Electrical Restively Imaging (ERI) delineate multiple small-scale mounds, atop of faults, that can attain 37 m height above average water table creating a relatively steep hydraulic gradient and deviating the groundwater flow direction. Future orbital radar sounding missions can benefit from characterizing the geometry of these mounds to define the measurement requirements of such hydrological features. The large-scale time-coherent subsurface mapping of the Saharan Arabian aquifers can provide unique insights to examine the aquifer connectivity and the response of aquifers to climatic and anthropogenic stresses in desert areas that otherwise cannot be addressed using existing sporadic well-logs. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Groundwater mounding Saharan-Arabian Desert Isotopes Artesian upward leakage Geoelectrical methods
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000704389400008
WOS关键词	WESTERN DESERT ; FOSSIL AQUIFERS ; NORTH-AFRICA ; WATER ; EGYPT ; ORIGIN ; EVOLUTION ; SYSTEM ; CONSTRAINTS ; RECHARGE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364600
作者单位	[Abotalib, Abotalib Z.; Heggy, Essam] Univ Southern Calif, Viterbi Sch Engn, Los Angeles, CA 90007 USA; [Abotalib, Abotalib Z.; El Bastawesy, Mohammed; Gad, Ahmed; Attwa, Mohamed] Natl Author Remote Sensing & Space Sci, Div Geol Applicat & Mineral Resources, Cairo, Egypt; [Heggy, Essam] CALTECH, Jet Prop Lab, Pasadena, CA USA; [Ismail, Esam] Minia Univ, Fac Sci, Geol Dept, El Minia, Egypt; [Attwa, Mohamed] Zagazig Univ, Fac Sci, Geol Dept, Zagazig, Egypt
推荐引用方式 GB/T 7714	Abotalib, Abotalib Z.,Heggy, Essam,El Bastawesy, Mohammed,et al. Groundwater mounding: A diagnostic feature for mapping aquifer connectivity in hyper-arid deserts[J],2021,801.
APA	Abotalib, Abotalib Z.,Heggy, Essam,El Bastawesy, Mohammed,Ismail, Esam,Gad, Ahmed,&Attwa, Mohamed.(2021).Groundwater mounding: A diagnostic feature for mapping aquifer connectivity in hyper-arid deserts.SCIENCE OF THE TOTAL ENVIRONMENT,801.
MLA	Abotalib, Abotalib Z.,et al."Groundwater mounding: A diagnostic feature for mapping aquifer connectivity in hyper-arid deserts".SCIENCE OF THE TOTAL ENVIRONMENT 801(2021).