Engineering, hydrogeological and vadose zone hydrological aspects of Proterozoic dolomites (South Africa)

Dippenaar, Matthys Alois; Rooy, J.L. Van; Diamond, Roger E.

doi:10.1016/j.jafrearsci.2018.07.024

Cited by 6 publications

(2 citation statements)

References 41 publications

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“…In addition, the involvement of the GTF zone led to heterogeneous water content in the vadose zone at different heights. , Natural and anthropogenic factors change the geological structure in unsaturated soil and saturated aquifers . Further research demonstrated that GTF leads to softening of the cenozoic rock structure, increasing compressibility, decreasing strength, and decreasing bearing capacity of soil within the vadose zone …”

Section: Impacts Of Gtf On Water Flowmentioning

confidence: 97%

“…69 Further research demonstrated that GTF leads to softening of the cenozoic rock structure, increasing compressibility, decreasing strength, and decreasing bearing capacity of soil within the vadose zone. 77 In addition, the generation of the near-river fluctuation zone was attributed to pressure shifts of the capillary fringe. 58 One of the reasons is that the elevated capillary fringe remits the effect of the interaction between the GTF zone and surface water.…”

Section: Impacts Of Gtf On Water Flowmentioning

confidence: 99%

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A Critical Review of Groundwater Table Fluctuation: Formation, Effects on Multifields, and Contaminant Behaviors in a Soil and Aquifer System

Wei,

Chen,

Cao

et al. 2024

Environ. Sci. Technol.

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The groundwater table fluctuation (GTF) zone is an important medium for the hydrologic cycle between unsaturated soil and saturated aquifers, which accelerates the migration, transformation, and redistribution of contaminants and further poses a potential environmental risk to humans. In this review, we clarify the key processes in the generation of the GTF zone and examine its links with the variation of the hydrodynamic and hydrochemistry field, colloid mobilization, and contaminant migration and transformation. Driven by groundwater recharge and discharge, GTF regulates water flow and the movement of the capillary fringe, which further control the advection and dispersion of contaminants in soil and groundwater. In addition, the formation and variation of the reactive oxygen species (ROS) waterfall are impacted by GTF. The changing ROS components partially determine the characteristic transformation of solutes and the dynamic redistribution of the microbial population. GTF facilitates the migration and transformation of contaminants (such as nitrogen, heavy metals, non-aqueous phase liquids, and volatile organic compounds) through colloid mobilization, the co-migration effect, and variation of the hydrodynamic and hydrochemistry fields. In conclusion, this review illustrates the limitations of the current literature on GTF, and the significance of GTF zones in the underground environment is underscored by expounding on the future directions and prospects.

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