Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR021034 |
Remote Detection of Saline Intrusion in a Coastal Aquifer Using Borehole Measurements of Self-Potential | |
MacAllister, D. J.1,2,3; Jackson, M. D.1; Butler, A. P.2; Vinogradov, J.1,4 | |
2018-03-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:3页码:1669-1687 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Scotland |
英文摘要 | Two years of self-potential (SP) measurements were made in a monitoring borehole in the coastal UK Chalk aquifer. The borehole SP data showed a persistent gradient with depth, and temporal variations with a tidal power spectrum consistent with ocean tides. No gradient with depth was observed at a second coastal monitoring borehole ca. 1 km further inland, and no gradient or tidal power spectrum were observed at an inland site ca. 80 km from the coast. Numerical modeling suggests that the SP gradient recorded in the coastal monitoring borehole is dominated by the exclusion-diffusion potential, which arises from the concentration gradient across a saline front in close proximity to, but not intersecting, the base of the borehole. No such saline front is present at the two other monitoring sites. Modeling further suggests that the ocean tidal SP response in the borehole, measured prior to breakthrough of saline water, is dominated by the exclusion-diffusion potential across the saline front, and that the SP fluctuations are due to the tidal movement of the remote front. The electrokinetic potential, caused by changes in hydraulic head across the tide, is one order of magnitude too small to explain the observed SP data. The results suggest that in coastal aquifers, the exclusion-diffusion potential plays a dominant role in borehole SP when a saline front is nearby. The SP gradient with depth indicates the close proximity of the saline front to the borehole and changes in SP at the borehole reflect changes in the location of the saline front. Thus, SP monitoring can be used to facilitate more proactive management of abstraction and saline intrusion in coastal aquifers. |
英文关键词 | self-potential seawater Intrusion coastal aquifers exclusion-diffusion potential electrokinetic potential hydrogeophysics |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430364900015 |
WOS关键词 | ELECTRICAL-RESISTIVITY TOMOGRAPHY ; HYDRAULICALLY ACTIVE FRACTURES ; HYDROCARBON RESERVOIRS ; CONTAMINANT TRANSPORT ; CARBONATE AQUIFERS ; SOUTHERN ENGLAND ; JOINT INVERSION ; CHALK AQUIFER ; POROUS-MEDIA ; TRACER TEST |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21564 |
专题 | 资源环境科学 |
作者单位 | 1.Imperial Coll London, Dept Earth Sci & Engn, London, England; 2.Imperial Coll London, Dept Civil & Environm Engn, London, England; 3.British Geol Survey, Lyell Ctr, Edinburgh, Midlothian, Scotland; 4.Univ Aberdeen, Kings Coll, Sch Engn, Aberdeen, Scotland |
推荐引用方式 GB/T 7714 | MacAllister, D. J.,Jackson, M. D.,Butler, A. P.,et al. Remote Detection of Saline Intrusion in a Coastal Aquifer Using Borehole Measurements of Self-Potential[J]. WATER RESOURCES RESEARCH,2018,54(3):1669-1687. |
APA | MacAllister, D. J.,Jackson, M. D.,Butler, A. P.,&Vinogradov, J..(2018).Remote Detection of Saline Intrusion in a Coastal Aquifer Using Borehole Measurements of Self-Potential.WATER RESOURCES RESEARCH,54(3),1669-1687. |
MLA | MacAllister, D. J.,et al."Remote Detection of Saline Intrusion in a Coastal Aquifer Using Borehole Measurements of Self-Potential".WATER RESOURCES RESEARCH 54.3(2018):1669-1687. |
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