Evaluating Discharge Regimes of Karst Aquifer

Malík, Peter

doi:10.1007/978-3-319-12850-4_7

Cited by 26 publications

(26 citation statements)

References 21 publications

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“…This approach uses simplified assumptions of aquifer properties and the related hydrological processes. Nevertheless, it is generally used for karst springs because it allows a gross estimation of flow components (Malik, ). Here, the model was applied to vadose zone flow given the regularity of discharge reactions through the year reflecting vadose storage and transmission properties in a well‐defined system.…”

Section: Field Resultsmentioning

confidence: 99%

“…The subregimes of flow measured in the percolation were separated using the methodology described by Malik () based on the master recession curve (MRC). The method comes from the analytical solution describing aquifer recession segments developed based on the Maillet () equation.…”

Section: Methodsmentioning

confidence: 99%

“…Each recession limb is approximated by a function that is the sum of several exponential or linear segments of the total recession, also described as the MRC (Malik, ).

Q_{t} = \sum_{i = 1}^{n} Q_{0 i} e^{- α_{i} t} + \sum_{j = 1}^{m} ((), \frac{1}{2} + \frac{|1 - β_{j} t|}{2 ((), 1 - β_{j} t)}) Q_{0 j} ((), 1 - β_{j} t) .

…”

Section: Methodsmentioning

confidence: 99%

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Assessment of groundwater recharge processes through karst vadose zone by cave percolation monitoring

Poulain

Watlet

Kaufmann

et al. 2018

Hydrological Processes

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Recharge processes of karst aquifers are difficult to assess given their strong heterogeneity and the poorly known effect of vadose zone on infiltration. However, recharge assessment is crucial for the evaluation of groundwater resources. Moreover, the vulnerability of karst aquifers depends on vadose zone behaviour because it is the place where most contamination takes place. In this work, an in situ experimental approach was performed to identify and quantify flow and storage processes occurring in karst vadose zone. Cave percolation monitoring and dye tracing were used to investigate unsaturated zone hydrological processes. Two flow components (diffuse and quick) were identified and, respectively, account for 66% and 34% of the recharge. Quickflow was found to be the result of bypass phenomenon in vadose zone related to water saturation. We identify the role of epikarst as a shunting area, most of the storage in the vadose zone occurring via the diffuse flow component in low permeability zones. Relationship between rainfall intensity and transit velocity was demonstrated, with 5 times higher velocities for the quick recharge mode than the diffuse mode. Modelling approach with KarstMod software allowed to simulate the hybrid recharge through vadose zone and shows promising chances to properly assess the recharge processes in karst aquifer based on simple physical models.

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Section: Field Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Assessment of groundwater recharge processes through karst vadose zone by cave percolation monitoring

Poulain

Watlet

Kaufmann

et al. 2018

Hydrological Processes

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“…With given recession coefficients and initial discharge values, both runoff and partial runoff segments (sub-regimes) can be fully described. In karst hydrogeology, the term "sub-regime" refers to the changing conditions of a groundwater system, its characteristic behavior, or the controlling of natural processes, which usually occur in a regular pattern [24].Apart from recession analysis, univariate and bivariate analyses can also be performed on spring hydrographs. Valuable indirect information regarding karst systems can be obtained by performing a time series analysis [25].…”

mentioning

confidence: 99%

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confidence: 99%

Groundwater Circulation in Fractured and Karstic Aquifers of the Umbria-Marche Apennine

Tamburini

Menichetti

2020

Water

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The Umbria-Marche Apennine has a large number of springs that drain water stored in carbonate formations. Spring groundwater constitutes a crucial freshwater resource for many countries, regions, and cities around the world. This study aimed to understand the hydrological mechanisms behind groundwater circulation and their relationship to the structural and stratigraphic settings of specific aquifers. Recession analysis and time series analysis were applied to the daily discharge of six springs monitored over eight years. Both analyses indicated the presence of two types of aquifers: aquifer with unimodal behavior and aquifer with bimodal behavior. The first are characterized by two hydrodynamic sub-regimes, in which fracture networks control the baseflow and conduit networks control the quickflow. In contrast, other springs present only one hydrodynamic sub-regime related to fracture network drainage. Time series analysis confirms the results of recession analysis, showing a large memory effect and a large response time, implying the dominance of the baseflow sub-regime. These results indicate that the Maiolica Formation is characterized by a high degree of fracturation and slight karstification, which control infiltration and percolation, whereas the Calcare Massiccio Formation regulates groundwater circulation in the deeper zones of the aquifer, characterized by a high degree of karstification through moderately developed conduit networks.Water 2020, 12, 1039 2 of 21 linear baseflow recession. Kovács et al. [12] showed that the recession coefficient allows for obtaining important information about aquifer hydraulic parameters and conduit network characteristics. One main advantage of recession curve analysis is that a set of empirical, quantitative parameters attributed to drainage mechanisms can be calculated [15].Analysis of individual recession periods sometimes generates inconsistences related to the complexity of groundwater circulation and the processes acting on the system [16]. Therefore, a master recession curve (MRC) is commonly used for simultaneously analyzing a set of hydrograph recessions at a particular catchment [17][18][19][20][21][22].Malík and Vojtková [23] performed a recession curve analysis to evaluate the karstification degree and the hydrodynamic behavior of an aquifer. With given recession coefficients and initial discharge values, both runoff and partial runoff segments (sub-regimes) can be fully described. In karst hydrogeology, the term "sub-regime" refers to the changing conditions of a groundwater system, its characteristic behavior, or the controlling of natural processes, which usually occur in a regular pattern [24].Apart from recession analysis, univariate and bivariate analyses can also be performed on spring hydrographs. Valuable indirect information regarding karst systems can be obtained by performing a time series analysis [25]. Mangin [26] developed a specific methodology for studying the input-output relationships in karst aquifers, as well as for performing auto-correl...

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Comparison of Mine Drainage/Karst Springs Discharge Recession Curves

Malík

Bajtoš

2017

EuroKarst 2016, Neuchâtel

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Evaluating Discharge Regimes of Karst Aquifer

Cited by 26 publications

References 21 publications

Assessment of groundwater recharge processes through karst vadose zone by cave percolation monitoring

Assessment of groundwater recharge processes through karst vadose zone by cave percolation monitoring

Groundwater Circulation in Fractured and Karstic Aquifers of the Umbria-Marche Apennine

Comparison of Mine Drainage/Karst Springs Discharge Recession Curves

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