Application of Newton iteration to the numerical solution of variable-density groundwater flow in saturated-unsaturated coastal zones DOI Creative Commons
Meng Yao, Shengchao Yu, Hailong Li

et al.

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: July 28, 2023

When addressing the question of variable saturation and density groundwater flow in coastal zones, highly nonlinear system coupled water-salt equations may deserve more attention. The classical Picard scheme is associated with slow calculation speeds low precision, which hardly meet actual needs users. Here, we developed a new numerical solution for issues based on Newton compared advantages disadvantages different methods by analyzing cases seawater intrusion. simulation results indicated that variable-density effect significantly extends computation time model, but still has computational speed better convergence scheme, especially conditions involving high-frequency large-amplitude tidal fluctuations, steep aquifer slopes, coarse grid. Furthermore, Newton-Picard method, schemes, improves robustness optimizes solution. This study revealed characteristics flow, providing ideas insights solutions to problems.

Language: Английский

Field and Numerical Investigations of Wave Effects on Groundwater Flow and Salt Transport in a Sandy Beach DOI
Shengchao Yu, Xuejing Wang, Hailong Li

et al.

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(11)

Published: Nov. 1, 2022

Abstract Coastal dynamic forces, such as waves and tides, altogether drive groundwater circulation salt transport in the intertidal zone. However, few numerical studies have ever considered combined effects of tides. In this study, fluctuations wave height are integrated with tidal level together using an iterative least squares fitting method, which can be acquired from measured sea surf zone, fitted is further verified by wind speed. Groundwater flow were then simulated MARUN code to evaluate impacts after considering effect. The equivalent freshwater head salinity model effect presented less difference data compared results without After incorporating a model, submarine discharge (SGD) was increased, among recirculated SGD grew more rapidly than fresh, leading proportion fresh accounting for small (1.1%). water influx efflux rates increased greatly especially during period high height. Most occurred while considerable amount subtidal algorithm separate mixed field employed identify quantify respective tides on density‐dependent beach flow.

Language: Английский

Citations

14
Coastal groundwater dynamics with a focus on wave effects DOI
Yihao Zheng,

Mingzhe Yang,

Haijiang Liu

et al.

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 256, P. 104869 - 104869

Published: July 20, 2024

Language: Английский

Citations

2
Vertical leaching of paleo-saltwater in a coastal aquifer–aquitard system of the Pearl River Delta DOI
Shengchao Yu,

Jiu Jimmy Jiao,

Xin Luo

et al.

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 626, P. 130168 - 130168

Published: Sept. 15, 2023

Language: Английский

Citations

6
Variable-density solute transport in unconfined coastal aquifers with a subsurface dam DOI Creative Commons
Yu Fan, Chengji Shen, Yifan Xie

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: June 24, 2024

Recently, the influence of subsurface dams on solute transport in coastal aquifers has become a hot research topic. Although many studies have been conducted, combined effects dam and tides variable-density remain unclear, this study aimed to fill gap. In current study, numerical model representing 2-D cross-shore aquifer was established. The simulated cases with without dam, sensitivity analysis different height location concentration. results show that blocks portion plume, which can only be discharged by dilution at edges, thereby altering its discharge pattern reducing their rate. addition may either prolong or shorten residence time solute,depending rather than dam. particular, more landward would significantly increase time; demonstrates both shift contribute heightened ratio dynamic mass distribution for plume within freshwater saltwater zones aquifer, maximum changes ratios 87.22% 300%, respectively. Also, these factors cause migrate seaward landward, respectively, across primary outflow regions aquifer-ocean interface. Results from provide theoretical guidance optimal design environmental impact assessment dams.

Language: Английский

Citations

1
Occurrence of CO2 and CH4 and the behavior of inorganic carbon in the groundwater of the Pearl River Delta DOI
Shengchao Yu,

Jiu Jimmy Jiao,

Yi Liu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 956, P. 177141 - 177141

Published: Nov. 4, 2024

Language: Английский

Citations

1
Horizontal two-dimensional groundwater-level fluctuations in response to the combined actions of tide and rainfall in an unconfined coastal aquifer DOI
Yihao Zheng,

Mingzhe Yang,

Haijiang Liu

et al.

Hydrogeology Journal, Journal Year: 2022, Volume and Issue: 30(8), P. 2509 - 2518

Published: Nov. 14, 2022

Language: Английский

Citations

6
Hydraulic head fluctuations in an intermediate depth coastal surface aquifer DOI Creative Commons
Rachel Housego, Britt Raubenheimer, Steve Elgar

et al.

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 625, P. 130017 - 130017

Published: Aug. 9, 2023

Language: Английский

Citations

2
Evaluation of wave-induced flow through marine porous media accounting for transition of seepage properties across multiple flow regimes DOI Creative Commons

Shihuan Zou,

Maosong Huang,

Zhenhao Shi

et al.

Applied Ocean Research, Journal Year: 2024, Volume and Issue: 154, P. 104346 - 104346

Published: Dec. 1, 2024

Language: Английский

Citations

0
The impact of wave-topography interaction on submarine groundwater discharge—Transport, turbulence, and mixing over rough seabeds DOI Creative Commons

Helena Stirnweiß,

Leonie Kandler, Sven Grundmann

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132507 - 132507

Published: Dec. 1, 2024

Language: Английский

Citations

0
Application of Newton iteration to the numerical solution of variable-density groundwater flow in saturated-unsaturated coastal zones DOI Creative Commons
Meng Yao, Shengchao Yu, Hailong Li

et al.

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: July 28, 2023

When addressing the question of variable saturation and density groundwater flow in coastal zones, highly nonlinear system coupled water-salt equations may deserve more attention. The classical Picard scheme is associated with slow calculation speeds low precision, which hardly meet actual needs users. Here, we developed a new numerical solution for issues based on Newton compared advantages disadvantages different methods by analyzing cases seawater intrusion. simulation results indicated that variable-density effect significantly extends computation time model, but still has computational speed better convergence scheme, especially conditions involving high-frequency large-amplitude tidal fluctuations, steep aquifer slopes, coarse grid. Furthermore, Newton-Picard method, schemes, improves robustness optimizes solution. This study revealed characteristics flow, providing ideas insights solutions to problems.

Language: Английский

Citations

0