A geochemical and stable isotope investigation of groundwater/surface-water interactions in the Velenje Basin, Slovenia

Kanduč, Tjaša; Grassa, Fausto; McIntosh, Jennifer C.; Stibilj, Vekoslava; Ulrich-Supovec, Marija; Supovec, Ivan; Jamnikar, Sergej

doi:10.1007/s10040-014-1103-7

Cited by 47 publications

(34 citation statements)

References 41 publications

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“…However, such methods are vulnerable to heterogeneity and therefore difficult for spatial integration. Hydrochemical analysis and mass balance methods (Sacks et al 1998;Stauffer 1985) are better in that respect but require a conservative tracer not influenced by land-use practices such as for example stable isotopes (Brindha et al 2014;Kanduč et al 2014;Krabbenhoft et al 1990;Sacks et al 2014); additionally, convenient semianalytical water balance models (Ghosh et al 2015;Rudnick et al 2015) involve quite a number of assumptions simplifying spatial heterogeneity. The most complete and reliable assessment of lake-groundwater interaction is by increasingly sophisticated physically based distributed and integrated hydrological models, particularly if based on solid characterization of hydrogeological conditions of a lake and its adjacent area and time series data, as proposed in this artificial lakegroundwater interaction study.…”

Section: Introductionmentioning

confidence: 99%

Interactions of artificial lakes with groundwater applying an integrated MODFLOW solution

2017

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Artificial lakes (reservoirs) are regulated water bodies with large stage fluctuations and different interactions with groundwater compared with natural lakes. A novel modelling study characterizing the dynamics of these interactions is presented for artificial Lake Turawa, Poland. The integrated surface-water/groundwater MODFLOW-NWT transient model, applying SFR7, UZF1 and LAK7 packages to account for variably-saturated flow and temporally variable lake area extent and volume, was calibrated throughout 5 years (1-year warm-up, 4-year simulation), applying daily lake stages, heads and discharges as control variables. The water budget results showed that, in contrast to natural lakes, the reservoir interactions with groundwater were primarily dependent on the balance between lake inflow and regulated outflow, while influences of precipitation and evapotranspiration played secondary roles. Also, the spatio-temporal lakebed-seepage pattern was different compared with natural lakes. The large and fast-changing stages had large influence on lakebed-seepage and water table depth and also influenced groundwater evapotranspiration and groundwater exfiltration, as their maxima coincided not with rainfall peaks but with highest stages. The mean lakebed-seepage ranged from~0.6 mm day −1 during lowest stages (lake-water gain) to~1.0 mm day −1 during highest stages (lake-water loss) with largest losses up to 4.6 mm day −1 in the peripheral zone. The lakebed-seepage of this study was generally low because of low lakebed leakance (0.0007-0.0015 day −1 ) and prevailing upward regional groundwater flow moderating it. This study discloses the complexity of artificial lake interactions with groundwater, while the proposed front-line modelling methodology can be applied to any reservoir, and also to natural lake interactions with groundwater.

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Section: Introductionmentioning

confidence: 99%

Interactions of artificial lakes with groundwater applying an integrated MODFLOW solution

2017

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“…A geological, SSW-NNE cross-section of the lignite mine in Velenje. The multi-layered aquifer system (Pl-1, Pl-2 and Pl-3) depicted is made up of sand strata atop a lignite stratum [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…In 1981, roof aquifers were divided into Quaternary and Pliocene aquifers, based on the degree of groundwater in a single aquifer, as well as on reactions to pumping, chemical analysis and geophysical characteristics [10][11][12][13]. The Pliocene aquifers were further divided into three categories, namely the aquifers directly above both the coal seam and the layer of isolation directly above it, Pl1, the aquifers lying from 20 m to 80 m above the coal seam, Pl2, and the aquifers lying where the upper Pliocene layer is, Pl3 [1,5,7,[13][14][15]. Examining the division from a point of view that prioritises safety, the Pl1 and Pl2 aquifers are the most crucial to keep an eye on, as the high degree of pressure present inside them can directly affect the underground works being done in their immediate vicinity [1,7,10].…”

Section: Introductionmentioning

confidence: 99%

The Development of Dewatering Predictions of the Velenje Coalmine

et al. 2016

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Abstract:The complex hydro-geological situation, particularly in terms of groundwater, has been a constant threat to the mining carried out at the Velenje colliery since its inception. Of particular interest to the authors are the difficulties presented to the colliery by the adjacent sand aquifers, as the water pressure within these sands directly impacts mining safety, and the aquifers themselves are most directly affected by dewatering. In order to monitor water levels and estimate dewatering at the Velenje wells, multi-layered modelling using 3D Finite Difference Method (FDM) has already been carried out. However, FDM is not optimal due to its greater dependence on cell size than on water flow. In 2017 in Velenje, a series of wells will be terminated as a result of mining and mining-induced subsidence, leading to dewatering and danger of flooding. As part of a plan to address this by replacing dewatering structures, a series of drive-in filters will be implemented around the entry and exit point tunnels of a longwall face. Because FDM seems to be inadequate for purposes of optimising this process, the Finite Elements Method (FEM) was applied in this case. Based on such an application of FEM, a prediction of the optimisation of drive-in filters was carried out by the authors.

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“…8 Sub-modern (recharged prior to 1952) 0. Mixture of sub-modern and modern [5][6][7][8][9][10][11][12][13][14][15] Modern (<5-10 years) [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Some bomb tritium present >30…”

Section: Tritium Content (Tu)mentioning

confidence: 99%

Determination of stable isotope characteristics and natural radioactivity in drinking waters in Sandıklı basin (Afyonkarahisar-Turkey)

Aksever¹,

Davraz²,

Karagüzel³

2018

Pamukkale J Eng Sci

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A geochemical and stable isotope investigation of groundwater/surface-water interactions in the Velenje Basin, Slovenia

Cited by 47 publications

References 41 publications

Interactions of artificial lakes with groundwater applying an integrated MODFLOW solution

Interactions of artificial lakes with groundwater applying an integrated MODFLOW solution

The Development of Dewatering Predictions of the Velenje Coalmine

Determination of stable isotope characteristics and natural radioactivity in drinking waters in Sandıklı basin (Afyonkarahisar-Turkey)

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