Numerical Study of Tidal Effects on Seawater Intrusion in Confined and Unconfined Aquifers by Time-Independent Finite-Difference Method

Chen, Bang-Fuh; Hsu, Shih-Meng

doi:10.1061/(asce)0733-950x(2004)130:4(191)

Cited by 25 publications

(16 citation statements)

References 21 publications

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“…11 and 15 indicates that the overland flow occurring on a sloping beach promotes intrusion as not only is a large area of salt-water infiltration formed under the beach surface but also the advancement of the salt wedge at the bottom of the aquifer greatly increased. This result is in agreement with that of Chen and Hsu (2004) who concluded that seawater intrusion increases with the slope of the beach. It also agrees with Ataie-Ashtiani et al (1999a) who found that a flat beach slope intensifies the changes in the configuration of concentration contours caused by the tidal activity.…”

Section: Sloping Effects -Comparison Between Two Simulationssupporting

confidence: 95%

Tidal influence on behaviour of a coastal aquifer adjacent to a low-relief estuary

Mao

Enot

Barry

et al. 2006

Journal of Hydrology

135

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Section: Sloping Effects -Comparison Between Two Simulationssupporting

confidence: 95%

Tidal influence on behaviour of a coastal aquifer adjacent to a low-relief estuary

Mao

Enot

Barry

et al. 2006

Journal of Hydrology

135

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“…[1999] and Chen and Hsu [2004] simulated the effect of tides on seawater intrusion in CUAs and found that tides force saltwater to intrude further inland and widen the DZ. These studies were based on simulations of shallow CUAs with relatively high ratios of tidal amplitude to aquifer depth.…”

Section: Tidesmentioning

confidence: 99%

Groundwater dynamics in subterranean estuaries of coastal unconfined aquifers: Controls on submarine groundwater discharge and chemical inputs to the ocean

Robinson¹,

Xin²,

Santos³

et al. 2018

Advances in Water Resources

214

148

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Sustainable coastal resource management requires sound understanding of interactions between coastal unconfined aquifers and the ocean as these interactions influence the flux of chemicals to the coastal ocean and the availability of fresh groundwater resources. The importance of submarine groundwater discharge in delivering chemical fluxes to the coastal ocean and the critical role of the subterranean estuary (STE) in regulating these fluxes is well recognized. STEs are complex and dynamic systems exposed to various physical, hydrological, geological, and chemical conditions that act on disparate spatial and temporal scales. This paper provides a review of the effect of factors that influence flow and salt transport in STEs, evaluates current understanding on the interactions between these influences, and synthesizes understanding of drivers of nutrient, carbon, greenhouse gas, metal and organic contaminant fluxes to the ocean.Based on this review, key research needs are identified. While the effects of density and tides are well understood, episodic and longer-period forces as well as the interactions between multiple influences remain poorly understood. Many studies continue to focus on idealized nearshore aquifer systems and future work needs to consider real world complexities such as geological heterogeneities, and non-uniform and evolving alongshore and cross-shore morphology. There is also a significant need for multidisciplinary research to unravel the interactions between physical and biogeochemical processes in the STE, as most existing studies treat these processes in isolation. Better understanding of this complex and dynamic system can improve sustainable management of coastal water resources under the influence of anthropogenic pressures and climate change.

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“…A combination of reduction in pumping rate and increase in recharge rate in Scenario F (due to climate change), which embraces not only the quantity but also quality for both environmental restoration and island aquifer. Recent studies conducted by Chen and Hsu (2004) and Moustadraf et al (2008) showed that groundwater level fluctuations have a strong correlation with climatic trends. According to IPCC (1997), groundwater recharge may increase in areas where heavy precipitations are major sources of groundwater recharge.…”

Section: Fig 6: Chloride Concentrations Simulations In Different Scementioning

confidence: 99%

Groundwater resources assessment using numerical model: A case study in low-lying coastal area

Praveena

Aris

2009

Int. J. Environ. Sci. Technol.

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ABSTRACT:The impacts of climate change and human pressure in groundwater have been greatest threats facing small islands. This paper represents a case study of groundwater responses towards the climate change and human pressures in Manukan Island Malaysia. SEAWAT-2000 was used for the simulations of groundwater response in study area. Simulations of six scenarios representing climate change and human pressures showed changes in hydraulic heads and chloride concentrations. Reduction in pumping rate and an increase in recharge rate can alter the bad effects of overdrafts in Manukan Island. In general, reduction in pumping rate and an increase in recharge rate are capable to restore and protect the groundwater resources in Manukan Island. Thus, for groundwater management options in Manukan Island, scenario 2 is capable to lessen the seawater intrusion into the aquifer and sustain water resources on a long-term basis. The selection of scenario 6 is the preeminent option during wet season. The output of this study provides a foundation which can be used in other small islands of similar hydrogeological condition for the purpose of groundwater resources protection.

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Numerical Study of Tidal Effects on Seawater Intrusion in Confined and Unconfined Aquifers by Time-Independent Finite-Difference Method

Cited by 25 publications

References 21 publications

Tidal influence on behaviour of a coastal aquifer adjacent to a low-relief estuary

Tidal influence on behaviour of a coastal aquifer adjacent to a low-relief estuary

Groundwater dynamics in subterranean estuaries of coastal unconfined aquifers: Controls on submarine groundwater discharge and chemical inputs to the ocean

Groundwater resources assessment using numerical model: A case study in low-lying coastal area

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