干旱区生态环境知识资源中心(Arid): Potential of mixed hydraulic barriers to remediate seawater intrusion

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DOI	10.1016/j.scitotenv.2019.07.284
	Potential of mixed hydraulic barriers to remediate seawater intrusion
	Ebeling, Pia 1,2; Haendel, Falk 2,3; Walther, Marc 2,4
通讯作者	Ebeling, Pia
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	693
英文摘要	Remediation measures are crucial to prevent or reverse seawater intrusion deteriorating coastal fresh groundwater resources. The mixed hydraulic barrier approach, as a combination of positive and negative hydraulic barriers, holds promising advantages especially for arid areas because extracted water provides a resource for injection after treatment. However, transient remediation mechanisms and impact of parameters are still unsatisfyingly understood. Therefore, the feasibility and optimal management of mixed hydraulic barriers as well as a comparison to single positive and negative barriers are explored with a synthetic 2D variable-density model of an already salinated, unconfined coastal aquifer using SEAWAT and FloPy. The hydraulic conductivity, porosity, injection and extraction rate, barrier locations, injection salt concentration, and reduction of pumping stress are varied jointly to determine the parameters' impact and interdependencies. The hydraulic conductivity controls the overall remediation potential as a hydrogeological component. Reduced inland abstractions of supply wells and the injection rates of the positive barrier show the largest remediation effects. However, locating the positive barrier within the salt wedge poses the risk of trapping salt landside. A sole negative barrier did not improve remediation substantially. This study thus shows that remediation with mixed hydraulic barriers can be feasible if implemented according to local conditions. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Seawater intrusion remediation Mixed hydraulic barriers Unconfined coastal aquifers Variable density SEAWAT FloPy
类型	Article
语种	英语
国家	Germany
收录类别	SCI-E
WOS记录号	WOS:000489694700089
WOS关键词	SALTWATER INTRUSION ; COASTAL AQUIFER ; RECHARGE ; SYSTEM ; VERIFICATION ; WELLS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-11-25
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310984
作者单位	1.UFZ Helmholtz Ctr Environm Res, Dept Hydrogeol, Permoserstr 15, D-04318 Leipzig, Germany; 2.Tech Univ Dresden, Inst Groundwater Management, Bergstr 66, D-01069 Dresden, Germany; 3.UFZ Helmholtz Ctr Environm Res, Dept Monitoring & Explorat Technol, Permoserstr 15, D-04318 Leipzig, Germany; 4.UFZ Helmholtz Ctr Environm Res, Dept Environm Informat, Permoserstr 15, D-04318 Leipzig, Germany
推荐引用方式 GB/T 7714	Ebeling, Pia,Haendel, Falk,Walther, Marc. Potential of mixed hydraulic barriers to remediate seawater intrusion[J],2019,693.
APA	Ebeling, Pia,Haendel, Falk,&Walther, Marc.(2019).Potential of mixed hydraulic barriers to remediate seawater intrusion.SCIENCE OF THE TOTAL ENVIRONMENT,693.
MLA	Ebeling, Pia,et al."Potential of mixed hydraulic barriers to remediate seawater intrusion".SCIENCE OF THE TOTAL ENVIRONMENT 693(2019).