Nonlinear interactions of waves and tides in a subterranean estuary

Xin, Pei, Wang, Shen S. J., Lu, Chunhui, Robinson, Clare and Li, Ling (2015) Nonlinear interactions of waves and tides in a subterranean estuary. Geophysical Research Letters, 42 7: 2277-2284. doi:10.1002/2015GL063643

Author Xin, Pei
Wang, Shen S. J.
Lu, Chunhui
Robinson, Clare
Li, Ling
Title Nonlinear interactions of waves and tides in a subterranean estuary
Journal name Geophysical Research Letters   Check publisher's open access policy
ISSN 1944-8007
Publication date 2015-04-16
Year available 2015
Sub-type Article (original research)
DOI 10.1002/2015GL063643
Open Access Status Not yet assessed
Volume 42
Issue 7
Start page 2277
End page 2284
Total pages 8
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Subject 1908 Geophysics
1900 Earth and Planetary Sciences
Abstract Previous studies have revealed hysteretic behavior in subterranean estuaries in response to intensified wave conditions caused by offshore storm events, showing dependence of submarine groundwater discharge (SGD) and subsurface salt distribution on historic wave conditions. Although most shorelines worldwide are also exposed to tidal fluctuations, it is unclear how tides moderate wave-induced SGD and salinity distribution in subterranean estuaries. This study presents numerical simulations that explore the combined influence of intensified wave conditions and tides on groundwater flow and salt transport in a subterranean estuary. The results show that tides weaken the hysteretic wave effect on SGD, suggesting that a tidally influenced subterranean estuary is less sensitive to intensified wave conditions with respect to the water fluxes across the aquifer-sea interface. However, due to enhancement of salt-freshwater mixing, tides strengthen the hysteretic wave effect on the salt fluxes across the aquifer-sea interface, prolonging the recovery of salt distribution in the subterranean estuary to the prestorm state. These findings reveal the nonlinear, coupling nature of processes driven by oceanic oscillations at different time scales in subterranean estuaries.
Keyword Salt transport
Submarine groundwater discharge
Subterranean estuary
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 51279056
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
School of Civil Engineering Publications
Official 2016 Collection
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