Comparison of Flow Processes in Drains and Low Permeability Volumes of a Karst System in the French Jura Mountains: High-Resolution Hydrochemical Characterization During a Flood Event

Denimal, Sophie; Bertrand, Catherine; Steinmann, Marc; Carry, Nicolas

doi:10.1007/978-3-319-45465-8_29

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…The dissolved silica enrichment has been ascribed in that case to higher temperatures acquired by water which before resurfacing in the discharge zone, had circulated along deep (up to 2 km) owpaths. Other reports of silica abundances in karst waters (e.g., Lastennet and Mudry, 1997; Díaz-Puga et al 2016; Denimal et al 2017) have addressed settings virtually devoid of any allogenic recharge, hence the corresponding results cannot be directly compared to those of the present investigation.…”

Section: Introductionmentioning

confidence: 70%

Dissolved Ba as discriminator between two adjacent karst catchments that are both subject to allogenic recharge (Sohodol valley, Vâlcan Mountains, Romania)

Cruceru,

Mitrofan,

Marin

et al. 2024

Preprint

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In a fluviokarst region, three seldom used natural tracers, SiO2, Na and Ba, were considered for tracking the allogenic, silicate-derived water contribution to cave streams and to final karst outflows. The concerned allogenic recharge originates in watersheds that consist of metamorphic formations intruded by magmatic rocks, for which available whole rock chemistry data indicate rather uniform contents of SiO2 and Na, but contrasting (up to one order of magnitude) contents of Ba. All three considered natural tracers proved to behave, along karst flowpaths, conservatively, and indicated binary mixing between allogenic and autogenic inputs. However, only the dissolved Ba concentrations enabled chemical distinction to be made between two separate, adjacent karst catchments: one having allogenic inputs presumably derived mainly from the weathering of Ba-rich rocks (essentially granites), while the other had allogenic recharge originating mostly in the weathering of Ba-poor formations. In contrast, if only the sampled waters SiO2 and Na concentrations had been considered, it would have been virtually impossible to establish if the two adjacent karst catchments were distinct - or not - from each other. When considering each of the two karst catchments separately, the concentrations distribution of each of the three natural tracers, SiO2, Na and Ba, consistently indicated that between a swallet and a connected cave stream, then further between cave streams and final karst outflows, the allogenic water relative contribution gradually diminished to the benefit of autogenic water.

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Section: Introductionmentioning

confidence: 70%

Dissolved Ba as discriminator between two adjacent karst catchments that are both subject to allogenic recharge (Sohodol valley, Vâlcan Mountains, Romania)

Cruceru,

Mitrofan,

Marin

et al. 2024

Preprint

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“…The sampling campaigns were not done at the same period: some were done in 1991 (in the Southeast of France), others were done from 2003 to 2006 (in the South of France), and others were performed during 2015 (in the Southwest of France). For further details, specific site descriptions, materials and sampling methods are presented in the study of Lastennet and Mudry (1997) for the Provence sites, Binet et al, 2005 and 2017 for the Pyrenees site, Peyraube et al, 2012and Minvielle et al, 2015for the Perigord sites, Charlier et al, 2012and Denimal et al, 2017 for the Jura sites. Climate conditions slightly differ with respect to the site and the year.…”

Section: Data Setmentioning

confidence: 99%

SIc–Abacus: An in–situ tool for estimating SIc and Pco2 in the context of carbonate karst

Peyraube

Lastennet

Denis

et al. 2019

Journal of Hydrology

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This article aims to provide an on the spot, handy field tool that can be used in estimating the Saturation Index with respect to calcite in karst aquifers in a limestone context. It relies on an abacus that gives the SIc by using measured pH and bicarbonate concentration as coordinates. The analytical expressions of the carbonate equilibrium equations are derived in order to calculate SIc from values that can be measured on field. Using these established relationships, we propose an Abacus built from the SIc=f(Pco 2 eq) reference frame, hence called SIc-Abacus. Accuracy of SIc calculation is also discussed. SIc is calculated with values measured considering uncertainty coming from pH (±0.05 pH units), temperature (±0.1 °C), bicarbonate and calcium concentrations (±2.5 mg/L and ±2 mg/L). This gives, for each sample, a range of possible SIc values of ±0.060 pH units (for a bicarbonate concentration close to 300 mg/L). The effect on SIc range of possible values given by bicarbonate and calcium uncertainties is about 10 times lower than the effect brought by pH uncertainty. Also, bicarbonate and calcium concentration can be estimated from electrical conductivity leading to a possible range of SIc value of ±0.087 pH units. In both cases, the range of possible values of SIc varies according to the bicarbonate concentration. Using Cussac and Lascaux sites, an evaluation was done. Results show the goodness of fit (R 2 =0.96) between the calculated SIc from measured pH, bicarbonate and calcium concentration and the estimated SIc values generated from the SIc-Abacus. Apart from calculating SIc, another method which is an alternative use of the generated SIc equation focused on obtaining pH using parameters such as electrical conductivity and dissolved CO 2 measurements is presented. The study shows that SIc-Abacus can be a new in-situ tool for karst aquifer surveys. It can facilitate in making a swift decision that tackles carbonate karst issues (e.g. when selecting sites or in deciding if extensive monitoring should be performed or not based from a specific objective).

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A hydraulic–hydrochemical approach to impact assessment of a grout curtain on karst aquifer behavior

Jemcov

Đurović

2020

Hydrogeol J

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Comparison of Flow Processes in Drains and Low Permeability Volumes of a Karst System in the French Jura Mountains: High-Resolution Hydrochemical Characterization During a Flood Event

Cited by 4 publications

References 19 publications

Dissolved Ba as discriminator between two adjacent karst catchments that are both subject to allogenic recharge (Sohodol valley, Vâlcan Mountains, Romania)

Dissolved Ba as discriminator between two adjacent karst catchments that are both subject to allogenic recharge (Sohodol valley, Vâlcan Mountains, Romania)

SIc–Abacus: An in–situ tool for estimating SIc and Pco2 in the context of carbonate karst

A hydraulic–hydrochemical approach to impact assessment of a grout curtain on karst aquifer behavior

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