Application of dissolved gases concentration measurements, hydrochemical and isotopic data to determine the circulation conditions and age of groundwater in the Central Sudetes Mts

Kotowski, Tomasz; Chudzik, Linda; Najman, Joanna

doi:10.1016/j.jhydrol.2018.12.013

Cited by 7 publications

(6 citation statements)

References 48 publications

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“…For example, in shallow (<30 m) aquifers under reducing conditions, CFC‐11 and CFC‐12 can be virtually completely degraded (>95%) in waters older than 10 years (Horneman et al, 2008). On the other hand, according to Kotowski et al (2019), CFCs can occur in groundwater 50 years or older, also at considerable depths (up to 450 m), where they can decompose at maximum rates of 1.37 to 2.3 × 10 −12 pmol L −1 yr −1 (CFC‐11) and 0.91 to 1.64 × 10 −12 pmol L −1 yr −1 (CFC‐12). Considering the above observations, significant microbial degradation and consequent significant change in the concentrations of CFCs during the two‐day field test was considered unlikely.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…For example, in shallow (<30 m) aquifers under reducing conditions, CFC-11 and CFC-12 can be virtually completely degraded (>95%) in waters older than 10 years (Horneman et al, 2008). On the other hand, according to Kotowski et al (2019), CFCs can occur in groundwater 50 years or older, also at considerable depths (up to 450 m), where they can decompose at maximum rates of 1.37 to 2.3 Â 10 À12 pmol L À1 yr À1…”

Section: Limitations and Uncertainty Of The Applied Model Approachmentioning

confidence: 99%

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Analysis of the interaction between surface water and groundwater using gaseous tracers in a dynamic test at a riverbank filtration intake

Kotowski

Najman

Nowobilska-Luberda

et al. 2023

Hydrological Processes

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We discuss a study designed to elucidate the genesis and inflow conditions at riverbank filtration wells located on a mountain river. This article seeks to identify the most important drivers of spatio-temporal dynamics of water flow in the hyporheic exchange zone, in natural conditions and conditions disturbed by the water abstraction. In our study we try to contribute to further understanding the dynamics of groundwater mixing with river water in the hyporheic exchange zone. We focus on understanding river/aquifer interactions at the scale of reach of an intake, especially the unidirectional water flows induced by water abstraction. To understand these issues, a two-day field hydrogeological experiment was conducted based on a pumping test of increasing intensity. At each pumping stage, groundwater and river samples were collected to determine the concentration of noble gases, CFCs, SF6, stable isotope content, and the chemical composition of the water. The study results indicate a short pressure propagation time (of the order of several hours) between the intake and the river, which already results in the inflow of water from the riveraquifer mixing zone at low rates of water abstraction by the intake. As pumping rates increase, the conditions of mixing and inflow of water to individual wells stabilize or approach stabilized conditions in less than 1-2 days. The share of river water in the water flux flowing into the intake does not exceed 12%, whereas the ratio of river water to groundwater in the mixing zone is estimated at 1 to 7 or more. The range of the river-aquifer mixing zone may reach up to 170 m from the river and this range can be identified with a good approximation as coinciding with the range of the zone of hyporheic exchange in the study area.

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Section: Discussion Of the Resultsmentioning

confidence: 99%

Section: Limitations and Uncertainty Of The Applied Model Approachmentioning

confidence: 99%

Analysis of the interaction between surface water and groundwater using gaseous tracers in a dynamic test at a riverbank filtration intake

Kotowski

Najman

Nowobilska-Luberda

et al. 2023

Hydrological Processes

Self Cite

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“…This is important because groundwater flow paths in the fissured/pore aquifer widely vary over several depth magnitudes. These types of circulation conditions usually occur in fault zones and in such areas vertical groundwater flow is actually more important than lateral flow [19]. In the main water supply to the FD, some of these sub-systems have major contributions following further exploration for optimized productivity.…”

Section: R3/q3 Aquifer Sub-systemmentioning

confidence: 99%

“…This is important because groundwater flow paths in the fissured/pore aquifer widely vary over several depth magnitudes. These types of circulation conditions usually occur in fault zones and in such areas vertical groundwater flow is actually more important than lateral flow [19]. The investigation was conducted on 27 different sites in the FD, which has initially been mapped with the aquifer sub-system-R3/Q3 of Brazil.…”

Section: R3/q3 Aquifer Sub-systemmentioning

confidence: 99%

Hydrogeophysical Characterization of Fractured Aquifers for Groundwater Exploration in the Federal District of Brazil

et al. 2022

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The present study applies a geophysical approach to the Federal district of Brazil, a challenging hydrogeologic setting that requires improved investigation to enhance groundwater prospecting to meet the rising water demand. The geophysical characterization of a complex hard-rock aquifer sub-system was conducted using direct current (DC) electrical resistivity tomography (ERT) integrated with surface geological information. With a total of twenty-seven ERT profiles, the resistivity acquisition was carried out using a dipole-dipole array of electrodes with an inter-electrode spacing of 10 m. Based on resistivity ranges, the interpretation of the inverted resistivity values indicated a ground profile consisting of upper dry soil, saprolite, weathered, and fresh bedrock. Along with this layered subsurface stratigraphy, the approach allowed us to map the presence of significant hydrogeological features sharp contrasting anomalies that may suggest structural controls separating high-resistivity (≥7000 Ω m) and low-resistivity (<7000 Ω m) conducting zones in the uppermost 10 m of the ground. The assumed impacts of these features on groundwater development are discussed in light of the Brasilia aquifer settings.

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“…First, using hydrochemical and isotopic methods to identify groundwater circulation can help improve understanding of the overall situation. It is difficult to directly describe the heterogeneity of karst aquifers based on hydrochemical data alone, whereas environmental isotopes (such as 18 O and 2 H) can provide additional information on the recharge characteristics of karst aquifers under different flow conditions 19 – 22 , specific groundwater flow paths 4 , 18 , and water transport times in karst aquifers 23 – 29 . Flow monitoring is also an essential method of investigation that can obtain long time series of flow information with which to examine dynamic characteristics 4 .…”

Section: Introductionmentioning

confidence: 99%

Identification of origin and runoff of karst groundwater in the glacial lake area of the Jinsha River fault zone, China

Zhang

et al. 2022

Sci Rep

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Karst groundwater plays important roles as a water supply and in sustaining the biodiversity and ecosystems of the eastern Qinghai–Xizang Plateau. Owing to the stratigraphic structure, high tectonic activity, and changeable climate of the region, the recharge source, runoff path, and dynamic characteristics of karst groundwater are highly complex, which poses challenges with regard to the protection of water resources and ecology. This study identified the origin and flow processes of karst groundwater in the glacial lake area of the Jinsha River fault zone using satellite remote sensing, hydrochemical and isotope analyses, and flow measurements. Results showed that active faults control the distribution of glacial lakes and the recharge, runoff, and discharge of karst groundwater. Glacial lake water is an important source of karst groundwater in the Jinsha River fault zone area. Specifically, glacial lake water continuously recharges the karst system via faults, fractures, and karst conduits, thereby maintaining the relative stability of karst spring flows. Through hierarchical cluster analysis, two main runoff conduits of karst water were distinguished: one along the Dingqu Fault and the other along the Eastern Zhairulong Fault, which together account for 59% of the total regional karst groundwater flow. The elevation difference between the recharge and discharge areas of the main karst springs is > 1000 m. Groundwater runoff is fast and residence time in the aquifer is short. The dissolution of calcite and dolomite mainly occurs during transit through the groundwater system, and cation exchange is weak. Therefore, the regional karst springs are predominantly HCO3−Ca·Mg type. To protect regional karst water resources and ecology, the monitoring and protection of glacial lakes should be strengthened.

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Application of dissolved gases concentration measurements, hydrochemical and isotopic data to determine the circulation conditions and age of groundwater in the Central Sudetes Mts

Cited by 7 publications

References 48 publications

Analysis of the interaction between surface water and groundwater using gaseous tracers in a dynamic test at a riverbank filtration intake

Analysis of the interaction between surface water and groundwater using gaseous tracers in a dynamic test at a riverbank filtration intake

Hydrogeophysical Characterization of Fractured Aquifers for Groundwater Exploration in the Federal District of Brazil

Identification of origin and runoff of karst groundwater in the glacial lake area of the Jinsha River fault zone, China

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