The simulation of geochemical reactions in the Heng-Chun limestone formation, Taiwan

Liu, C.W.; Chen, J.F.

doi:10.1016/0307-904x(96)00001-7

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…Liu and Chen (1996), who used dispersivities of 100 m, reported a similar modeling approach in 1996. No further work on this problem was published until 2005, when Rezaei et al proposed a fully coupled flow and reactive transport model.…”

Section: Introductionmentioning

confidence: 75%

Evolution of porosity in the saltwater–freshwater mixing zone of coastal carbonate aquifers: An alternative modelling approach

Romanov

Dreybrodt

2006

Journal of Hydrology

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Section: Introductionmentioning

confidence: 75%

Evolution of porosity in the saltwater–freshwater mixing zone of coastal carbonate aquifers: An alternative modelling approach

Romanov

Dreybrodt

2006

Journal of Hydrology

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“…This phenomenon was later recognized in coastal carbonate aquifers, where groundwaters in the transition zone are normally under-saturated with respect to calcite due to water mixing. In fact, the transition zone constitutes an area of particularly high active karstification (mixing corrosion) resulting in the enhancement of secondary porosity (Herman and Back, 1984;Tulipano et al, 1990;Liu and Chen, 1996;Whitaker and Smart, 1997). At a geological time scale, the transition zones have shifted vertically and laterally according to the combined effects of eustatic sea level changes and tectonics.…”

Section: Hydrochemistrymentioning

confidence: 96%

Human-induced hydrogeological changes and sinkholes in the coastal gypsum karst of Lesina Marina area (Foggia Province, Italy)

Fidelibus

Gutiérrez

Spilotro

2011

Engineering Geology

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“…The change in calcite solubility with the increase of salt content in groundwaters is widely observed in coastal carbonate aquifers, where the transition zone constitutes an area of highly active karstification (mixing corrosion) with the enhancement of secondary porosity (Herman and Back 1984;Liu and Chen 1996;Tulipano et al 1990;Whitaker and Smart 1997). The nonlinear behaviour of gypsum solubility has been observed in continental gypsum aquifers subject to saline or hypersaline fluids.…”

Section: Introductionmentioning

confidence: 96%

Reactive-transport modelling of gypsum dissolution in a coastal karst aquifer in Puglia, southern Italy

Campana¹,

Fidelibus

2015

Hydrogeol J

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The gypsum coastal aquifer of Lesina Marina (Puglia, southern Italy) has been affected by sinkhole formation in recent decades. Previous studies based on geomorphologic and hydrogeological data ascribed the onset of collapse phenomena to the erosion of material that fills palaeo-cavities (suffosion sinkholes). The change in the hydrodynamic conditions of groundwater induced by the excavation of a canal within the evaporite formation nearly 100 years ago was identified as the major factor in triggering the erosion, while the contribution of gypsum dissolution was considered negligible. A combined reactive-transport/density-dependent flow model was applied to the gypsum aquifer to evaluate whether gypsum dissolution rate is a dominant or insignificant factor in recent sinkhole formation under current hydrodynamic conditions. The conceptual model was first defined with a set of assumptions based on field and laboratory data along a two-dimensional transect of the aquifer, and then a density-dependent, tide-influenced flow model was set up and solved using the numerical code SEAWAT. Finally, the resulting transient flow field was used by the reactive multicomponent transport model PHT3D to estimate the gypsum dissolution rate. The validation tests show that the model accurately represents the real system, and the multi-disciplinary approach provides consistent information about the causes and evolution time of dissolution processes. The modelled porosity development rate is too low to represent a significant contribution to the recent sinkhole formation in the Lesina Marina area, although it justifies cavity formation and cavity position over geological time.

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The simulation of geochemical reactions in the Heng-Chun limestone formation, Taiwan

Cited by 9 publications

References 8 publications

Evolution of porosity in the saltwater–freshwater mixing zone of coastal carbonate aquifers: An alternative modelling approach

Evolution of porosity in the saltwater–freshwater mixing zone of coastal carbonate aquifers: An alternative modelling approach

Human-induced hydrogeological changes and sinkholes in the coastal gypsum karst of Lesina Marina area (Foggia Province, Italy)

Reactive-transport modelling of gypsum dissolution in a coastal karst aquifer in Puglia, southern Italy

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