Analytical study for wave-induced submarine groundwater discharge in subtidal zone

Yu，Shengchao1,2; Zhang，Xiaolang1,2; Li，Hailong1,3,4; Wang，Xuejing1,3,4; Wang，Chaoyue5; Kuang，Xingxing1,3,4

2022-09-01

10.1016/j.jhydrol.2022.128219

JOURNAL OF HYDROLOGY   Impact Factor & Quartile

0022-1694

1879-2707

Both tide and wave are significant coastal driving forces of submarine groundwater discharge (SGD). The hydrodynamic process of tidal SGD is well studied while wave induced part is still challenging to quantify. In this paper, an analytical study was performed to investigate wave-induced SGD in a subtidal aquifer extending horizontally infinitely with impermeable horizontal bottom. The loading effect of seawater weight overlying the seabed was taken into account. The analytical solution was validated by two-dimensional numerical simulations with modeling domains of finite horizontal extension length. Sensitivity analyses of the analytical solution showed that the amplitude of groundwater head fluctuations generally decayed exponentially with the aquifer thickness, and the decay rate decreased with increasing loading efficiency. Loading effect can decrease the head gradients between seawater and porewater. Wave-induced SGD generally increased with the aquifer's thickness, permeability, wavenumber, wave period, and decreased with the loading efficiency and specific storage of the aquifer. The analytical and simulated results may provide guidance for assessing the wave-induced SGD and shed light on modeling the biogeochemistry process in wave dominated porous seabed environment.

Analytical solution Coastal aquifer Loading effect Submarine groundwater discharge (SGD) Subtidal zone Wave-induced SGD

SCI ; EI

English

First ; Corresponding

Booz Allen Foundation[41972260];Booz Allen Foundation[42130703];

Engineering ; Geology ; Water Resources

Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources

WOS:000844338500002

ELSEVIER

20223412596107

Analytical models ; Decay (organic) ; Discharge (fluid mechanics) ; Efficiency ; Groundwater resources ; Loading ; Seawater ; Sensitivity analysis ; Submarines

Groundwater:444.2 ; Seawater, Tides and Waves:471.4 ; Combat Naval Vessels:672.1 ; Materials Handling Methods:691.2 ; Biochemistry:801.2 ; Chemical Reactions:802.2 ; Production Engineering:913.1 ; Mathematics:921

ENGINEERING

2-s2.0-85135932108

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
2.Department of Earth Sciences,The University of Hong Kong,Hong Kong,Hong Kong
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,Southern University of Science and Technology,Shenzhen,China
4.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
5.School of Water Resources & Environment,Hebei GEO University,Shijiazhuang,China

Yu，Shengchao,Zhang，Xiaolang,Li，Hailong,et al. Analytical study for wave-induced submarine groundwater discharge in subtidal zone[J]. JOURNAL OF HYDROLOGY,2022,612.

Yu，Shengchao,Zhang，Xiaolang,Li，Hailong,Wang，Xuejing,Wang，Chaoyue,&Kuang，Xingxing.(2022).Analytical study for wave-induced submarine groundwater discharge in subtidal zone.JOURNAL OF HYDROLOGY,612.

Yu，Shengchao,et al."Analytical study for wave-induced submarine groundwater discharge in subtidal zone".JOURNAL OF HYDROLOGY 612(2022).