干旱区生态环境知识资源中心(Arid): 3D Characterization of a Coastal Freshwater Aquifer in SE Malta (Mediterranean Sea) by Time-Domain Electromagnetics

Arid

DOI	10.3390/w12061566
	3D Characterization of a Coastal Freshwater Aquifer in SE Malta (Mediterranean Sea) by Time-Domain Electromagnetics
	Pondthai, Potpreecha; Everett, Mark E.; Micallef, Aaron; Weymer, Bradley A.; Faghih, Zahra; Haroon, Amir; Jegen, Marion
通讯作者	Pondthai, P
来源期刊	WATER
EISSN	2073-4441
出版年	2020
卷号	12 期号:6
英文摘要	Electromagnetic (EM) geophysical methods are well equipped to distinguish electrical resistivity contrasts between freshwater-saturated and seawater-saturated formations. Beneath the semi-arid, rapidly urbanizing island of Malta, offshore groundwater is an important potential resource but it is not known whether the regional mean sea-level aquifer (MSLA) extends offshore. To address this uncertainty, land-based alongshore and across-shore time-domain electromagnetic (TDEM) responses were acquired with the G-TEM instrument (Geonics Ltd., Mississauga, ON, Canada) and used to map the onshore structure of the aquifer. 1-D inversion results suggest that the onshore freshwater aquifer resides at 4-24 m depth, underlain by seawater-saturated formations. The freshwater aquifer thickens with distance from the coastline. We present 2D and 3D electromagnetic forward modeling based on finite-element (FE) analysis to further constrain the subsurface geometry of the onshore freshwater body. We interpret the high resistivity zones that as brackish water-saturated bodies are associated with the mean sea-level aquifer. Generally, time-domain electromagnetic (TDEM) results provide valuable onshore hydrogeological information, which can be augmented with marine and coastal transition-zone measurements to assess potential hydraulic continuity of terrestrial aquifers extending offshore.
英文关键词	coastal hydro-geophysics groundwater mean sea-level aquifer transient electromagnetics
类型	Article
语种	英语
开放获取类型	Green Accepted, gold
收录类别	SCI-E
WOS记录号	WOS:000550842100001
WOS关键词	TRANSIENT ; INDUCTION ; ISLANDS
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325125
作者单位	[Pondthai, Potpreecha; Everett, Mark E.] Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA; [Micallef, Aaron] Univ Malta, Dept Geosci, Marine Geol & Seafloor Surveying, MSD-2080 Msida, Malta; [Micallef, Aaron; Weymer, Bradley A.; Faghih, Zahra; Haroon, Amir; Jegen, Marion] GEOMAR Helmholtz Ctr Ocean Res Kiel, Wischhofstr 1-3, D-24148 Kiel, Germany
推荐引用方式 GB/T 7714	Pondthai, Potpreecha,Everett, Mark E.,Micallef, Aaron,et al. 3D Characterization of a Coastal Freshwater Aquifer in SE Malta (Mediterranean Sea) by Time-Domain Electromagnetics[J],2020,12(6).
APA	Pondthai, Potpreecha.,Everett, Mark E..,Micallef, Aaron.,Weymer, Bradley A..,Faghih, Zahra.,...&Jegen, Marion.(2020).3D Characterization of a Coastal Freshwater Aquifer in SE Malta (Mediterranean Sea) by Time-Domain Electromagnetics.WATER,12(6).
MLA	Pondthai, Potpreecha,et al."3D Characterization of a Coastal Freshwater Aquifer in SE Malta (Mediterranean Sea) by Time-Domain Electromagnetics".WATER 12.6(2020).