| DOI: | 10.1002/2014GL061184
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| 论文题名: | Tide-induced salt-fingering flow during submarine groundwater discharge |
| 作者: | Greskowiak J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9770
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| EISSN: | 1944-9501
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| 出版年: | 2014
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| 卷: | 41, 期:18 | | 起始页码: | 6413
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| 结束页码: | 6419
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| 语种: | 英语
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| 英文关键词: | groundwater flow
; salt-fingering flow
; submarine groundwater discharge
; tidal forcing
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| Scopus关键词: | Beaches
; Groundwater
; Groundwater flow
; Hydrogeology
; Submarines
; Water
; Dimensionless number
; Freshwater discharge
; Hydrogeological conditions
; Reactive transport process
; Stable flows
; Submarine groundwater discharge
; Subterranean estuary
; Tidal forcing
; Discharge (fluid mechanics)
; beach
; discharge
; groundwater
; groundwater flow
; hydrogeology
; numerical model
; solute transport
; stabilization
; tidal cycle
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| 英文摘要: | This study investigated the stability of the upper saline plume (USP) within shallow tide-affected submarine groundwater discharge (SGD) zones. In contrast to earlier studies, numerical modeling revealed a number of realistic hydrological and hydrogeological conditions where the USP becomes unstable and salt-fingering flow occurs. These conditions were reasonably well identified in a stability diagram based on two dimensionless numbers that characterize the system. If fingering flow occurs, the SGD pattern is distinctly different from that of stable flow conditions: (i) freshwater discharge zones along the beach face are manifold and change their location with time, (ii) undulating freshwater/seawater interface that is extended along the groundwater flow path, and (iii) the total tide-averaged fresh SGD rate varies considerably in an irregular pattern. This has presumably important implications on reactive transport processes in the subterranean estuary, as well as on the interpretation of field data on water and solute fluxes during SGD. Key Points Identification of unstable tide-induced upper saline plumes in beach zonesThey lead to moving freshwater springs and varying freshwater discharge ratesDimensionless instability diagram predicts the onset of salt-fingering flow ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911208397&doi=10.1002%2f2014GL061184&partnerID=40&md5=04b860ad1a1a061d9d0a754627022bc9
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7034
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Biology and Environmental Sciences, Carl von Ossietzky University, Oldenburg, Germany
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| Recommended Citation: | |
Greskowiak J.. Tide-induced salt-fingering flow during submarine groundwater discharge[J]. Geophysical Research Letters,2014-01-01,41(18).
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