@article{2-s2.0-85194079116,

title = {A study of riverbank filtration effectiveness in the Kępa Bogumiłowicka well field, southern Poland},

author = { K. Janik and K. Ślósarczyk and S.S. Sitek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85194079116&doi=10.1016%2fj.ejrh.2024.101834&partnerID=40&md5=1aefb2a77ca53cef34d80272f6523de7},

doi = {10.1016/j.ejrh.2024.101834},

year  = {2024},

date = {2024-01-01},

journal = {Journal of Hydrology: Regional Studies},

volume = {53},

publisher = {Elsevier B.V.},

abstract = {Study Region: Southern Poland, Dunajec River catchment Study Focus: The study evaluated an eleven-year observation period of physicochemical parameters within a riverbank filtration (RBF) site located by the Dunajec River. A total of nine parameters (pH; electrical conductivity; sulphate; chloride; nitrate; manganese; water hardness; colour; turbidity) in both surface water and groundwater underwent statistical scrutiny. This analysis encompassed Spearman's correlation, linear mixed-effects models and hypothesis testing. New Hydrological Insights for the Region: This study revealed that the Dunajec River constitutes a major factor in forming the exploited groundwater physicochemical composition. Statistically significant differences between two rows of wells were found, implying a more substantial RBF impact on the row closer to the Dunajec. However, the river's influence on further wells was also highlighted. The RBF process in the study area was considered efficient since it maintained a stable groundwater physicochemical composition and provided sufficient water for exploitation over the years. Comprehending the interactions between the surface water and groundwater flow system is crucial to the well field sustainability, enabling water supply system optimisation and a more precise assessment of risks regarding groundwater contamination. © 2024 The Authors},

note = {0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85162229004,

title = {Risk assessment for the prevention of managed aquifer recharge (MAR) facility failure during the operation and the expansion phases},

author = { S.S. Sitek and K. Janik and D. Dąbrowska and J. Różkowski and G. Wojtal and J. Mukawa and A. Jarosław Witkowski and S. Jakóbczyk-Karpierz},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85162229004&doi=10.1016%2fj.jhydrol.2023.129591&partnerID=40&md5=5b03919dc0e62351a4f849e024d847ca},

doi = {10.1016/j.jhydrol.2023.129591},

issn = {00221694},

year  = {2023},

date = {2023-01-01},

journal = {Journal of Hydrology},

volume = {621},

publisher = {Elsevier B.V.},

abstract = {This comprehensive risk assessment, done for a MAR facility in Tarnów, southern Poland, covers two MAR techniques: infiltration ditches and induced bank filtration during the operation and planned potential expansion phases. Two methods were applied: the semi-quantitative risk assessment matrix and the probabilistic risk assessment – fault tree analysis (PRA-FTA), and their advantages and limitations analysed. Both methods examine a range of technical and non-technical risks that may pose a threat to the efficient functioning of the MAR facility in Tarnów, which supplies about 25% of the city's population with drinking water. It was found that 34 of the 65 risks analysed could pose a low to high risk for the Świerczków well field. The predominant risks potentially reducing MAR efficiency or leading to MAR failure are technical ones. According to the PRA-FTA method, if no preventive measures are taken, there is a 99.5 and 99.3% probability of the MAR system failing during the operational and expansion phases, respectively. The results indicate that the most serious risk is associated with the insufficient initial removal from the recharge river water of suspended solids, which clog infiltration ditches. The risks scored as medium relate to the threat of groundwater inflow from an extensive industrial zone, lying to the east of the well field, and to climate change negatively affecting the quantity of groundwater resources. This is the first example in Poland of a risk assessment for an existing MAR facility and its expansion, based on a broad spectrum of technical and non-technical risks present at the Świerczków well field, using two methods: the risk assessment matrix and PRA-FTA. This case study is a practical example of how to perform a risk analysis for a MAR site. It can make an important contribution to existing knowledge in this field and enrich the subject literature, a particularly relevant aspect given the widespread use of MAR techniques in Central Europe for the supply of drinking water to the public. © 2023 Elsevier B.V.},

note = {1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85137843738,

title = {Assessing Economic Feasibility of Managed Aquifer Recharge Schemes: Evidence from Cost-benefit Analysis in Poland},

author = { O. Halytsia and M. Vrachioli and K. Janik and S.S. Sitek and G. Wojtal and A. Imig and A. Rein and J. Sauer},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85137843738&doi=10.1007%2fs11269-022-03303-0&partnerID=40&md5=245a2a0598dbd69307c2124d093bd844},

doi = {10.1007/s11269-022-03303-0},

issn = {09204741},

year  = {2022},

date = {2022-01-01},

journal = {Water Resources Management},

volume = {36},

number = {13},

pages = {5241-5258},

publisher = {Springer Science and Business Media B.V.},

abstract = {The accelerated growth of water demand globally calls for promising solutions in the field of water management. Managed aquifer recharge (MAR) systems are among the solutions that are capable of increasing water supply and improving water quality through natural attenuation processes. Along with hydrogeologic considerations and institutional feasibility assessments, economic analysis is essential when evaluating MAR projects. This study is the first one to provide an economic feasibility assessment of a MAR scheme in Poland by performing a cost-benefit analysis (CBA) combined with a contingent valuation study to identify the willingness-to-pay, sensitivity analysis to address uncertainty regarding the realisation of benefits and costs together with expert assessment of socio-economic risks associated with the MAR scheme implementation. The results suggest that the total economic value of the MAR scheme’s extension (which includes both use and non-use benefits) exceeds the costs of putting this system in place and maintaining it. This paper can contribute to the existing literature as a practical example providing the base for economic assessment and policy considerations of future sustainable water management projects. © 2022, The Author(s).},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85129648163,

title = {SEM-EDS and water chemistry characteristics at the early stages of glacier recession reveal biogeochemical coupling between proglacial sediments and meltwater},

author = { Ł. Stachnik and J.C. Yde and K. Krzemień and Ł. Uzarowicz and S.S. Sitek and P. Kenis},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129648163&doi=10.1016%2fj.scitotenv.2022.155383&partnerID=40&md5=ce0c910b31d387cb8544d64d4d3acc8b},

doi = {10.1016/j.scitotenv.2022.155383},

issn = {00489697},

year  = {2022},

date = {2022-01-01},

journal = {Science of the Total Environment},

volume = {835},

publisher = {Elsevier B.V.},

abstract = {Most glaciers worldwide are undergoing climate-forced recession, but the impact of glacier changes on biogeochemical cycles is unclear. This study examines the influence of proglacial sediment weathering on meltwater chemistry at the early stages of glacier recession in the High Arctic of Svalbard. Scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) in combination with a wide range of geochemical analyses were used in this study. The SEM-EDS analyses of sediments collected in front of Werenskioldbreen show general degradation of pyrite and carbonate grains with age. The outer parts of pyrite grains have a gradual decrease in sulphur and gradual increase in iron oxides due to pyrite oxidation. This process was less advanced in the proglacial zone younger than 100 years compared to older sites such as the terminal moraine from the Little Ice Age. In both the proglacial zone and the terminal moraine, physical weathering of mineral grains, including formation of microcracks and microfractures, clearly enhanced pyrite oxidation. A consequence of proglacial sediment weathering is that the river chemistry is strongly affected by carbonate dissolution driven by sulphuric acid from sulphide oxidation. Also, reactive iron oxides, a product of sulphide oxidation, are mobilized in the proglacial zone. The results of this study show that proglacial weathering in the High Arctic of Svalbard is strongly coupled to river geochemistry, especially during the early stages of proglacial exposure after glacier recession. © 2022 The Authors},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85130215194,

title = {Hydrogeological Model of the Forefield Drainage System of Werenskioldbreen, Svalbard},

author = { K. Stachniak and S.S. Sitek and D. Ignatiuk and J.A. Jania},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85130215194&doi=10.3390%2fw14091514&partnerID=40&md5=89e806fc545c2eaed1e13fa1228643f2},

doi = {10.3390/w14091514},

issn = {20734441},

year  = {2022},

date = {2022-01-01},

journal = {Water (Switzerland)},

volume = {14},

number = {9},

publisher = {MDPI},

abstract = {The significant recession of Arctic glaciers caused by climate warming is expanding their proglacial zones. Thus, their importance for the hydrology of glacierised basins is growing. In contrast to the surface waters in such areas, the role of groundwater in the hydrological balance of Svalbard catchments is poorly known. This paper presents the hydrogeological conditions and groundwater flow within the permafrost active layer in the forefield of the Werenskioldbreen glacier basin (44.1 km2), 61% of which is glacierised. Based on field studies of groundwater in the 2017 ablation season and laboratory analyses of the hydrogeological properties of proglacial sediments, a three-dimensional groundwater flow model (FEFLOW) for part of the glacier forefield (4.8 km2) was developed. The main results show the components and characteristics of the groundwater balance and indicate the preferential groundwater flow paths. The volume of water retained in the sediments of the marginal zone is 1.0073 mln m3. The maximum potential free pore space that could be filled by water is 2.0689 mln m3. The calculated groundwater discharge for average conditions is 6076.9 m3 d−1, which is about 2% of the total seasonal catchment runoff from the main glacial river. The results of the spatial analysis for the groundwater depth and the groundwater flow directions are also presented. There need to be further detailed studies of hydrogeological processes in glacial basins in Svalbard in order to develop existing knowledge. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},

note = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85101816647,

title = {Evaluation of geophysical methods for characterizing industrial and municipal waste dumps},

author = { M. Kondracka and I. Stan-Kłeczek and S.S. Sitek and D. Ignatiuk},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101816647&doi=10.1016%2fj.wasman.2021.02.015&partnerID=40&md5=89f0befd711ec0c1bbdbf464263ec432},

doi = {10.1016/j.wasman.2021.02.015},

issn = {0956053X},

year  = {2021},

date = {2021-01-01},

journal = {Waste Management},

volume = {125},

pages = {27-39},

publisher = {Elsevier Ltd},

abstract = {The main aim of this study was to assess the suitability of geophysical methods for investigating old waste dumps. Electrical Resistivity Tomography (ERT), Seismic Refraction Tomography (SRT), Multichannel Analysis of Surface Waves (MASW) and Ground Penetrating Radar (GPR) were the techniques used to characterize a waste dump in the town of Dąbrowa Górnicza (S Poland). GPR and SRT were the most difficult methods to use because of the dense vegetation, which attenuated the passage of electromagnetic and seismic waves to the ground. However, GPR did turn out to be an appropriate tool for characterizing variations in the surface cover. ERT, SRT and MASW clearly highlighted the transition between the waste deposit and the host sediments, and determined the approximate thickness of the waste deposits. With MASW, however, the waste type and the boundary between the waste layer and surface cover could not be delineated. In some places, the surface cover was identified using SRT. With both these methods, the problem with identification may be due to the small contrast in the S- and P-wave velocities through two kinds of waste (municipal and industrial), the thinness of the waste layer, and the considerable differentiation of the surface cover. The most accurate results regarding the waste deposits were obtained using ERT and different electrode spacings. ERT pinpointed the exact location of the stored waste, distinguished between the types of waste, and identified the soil cover. Data from shallow boreholes confirmed the interpretations of the methods. © 2021 Elsevier Ltd},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85084362774,

title = {Tracing multiple sources of groundwater pollution in a complex carbonate aquifer (Tarnowskie Góry, southern Poland) using hydrogeochemical tracers, TCE, PCE, SF6 and CFCs},

author = { S. Jakóbczyk-Karpierz and K. Ślósarczyk and S.S. Sitek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85084362774&doi=10.1016%2fj.apgeochem.2020.104623&partnerID=40&md5=4f7f9838d29344041202498c40263491},

doi = {10.1016/j.apgeochem.2020.104623},

issn = {08832927},

year  = {2020},

date = {2020-01-01},

urldate = {2020-01-01},

journal = {Applied Geochemistry},

volume = {118},

publisher = {Elsevier Ltd},

abstract = {A comprehensive study on the sources of groundwater contamination in the Triassic carbonate aquifer, southern Poland, was conducted. The Gliwice aquifer is an important source of potable water in the Silesia region, the most industrialized part of Poland. Groundwater quality has been deteriorating over the last decades, which encouraged researchers to undertake comprehensive study to identify the sources and fates of the observed pollution. The presented study comprised analyses of major and minor ions, trichloroethylene (TCE) and tetrachloroethylene (PCE), CFC-11, CFC-12, SF6, Ne and Ar in groundwater. The results showed that shallow groundwater within the Tarnowskie Góry town, located in the recharge zone of the aquifer, was more contaminated than groundwater abstracted from deeper part of the aquifer within the town, as well as groundwater located downgradient. A contamination plume of boron indicated an impact of the closed chemical plant, operating in the 20th century. Groundwater in the vicinity of the chemical plant was significantly altered, which was manifested by elevated concentrations of Cl−, SO4 2-, Na+, total Fe and Mn. The study revealed groundwater contamination with CFC-11 and CFC-12. Comparison of concentrations obtained in two field campaigns (in 2010 and 2015) showed an increase in the extent of pollution plumes. The third analysed gaseous tracer, SF6, did not appear to come from non-atmospheric sources, therefore, it was possible to calculate groundwater age using lumped parameter models. The results showed relatively young ages of the analysed groundwater samples, from 4 to 5 to 30–50 years. The youngest groundwater were found close to the Drama River, suggesting infiltration of the surface water into the carbonate aquifer. This feature of the river was confirmed by the observation of TCE and PCE concentrations in groundwater. Central part of the Tarnowskie Góry town was a source area for TCE and PCE contamination. Two directions of pollutants migration were observed, one of them was induced by the drainage of the historic ore mine and subsequently the Drama River – recipient of water coming from the mine drainage. © 2020 Elsevier Ltd},

note = {7},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85040737779,

title = {Modelowanie wód podziemnych na terenach górniczych z wykorzystaniem oprogramowania FEFLOW},

author = { S.S. Sitek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040737779&partnerID=40&md5=46fa20e5cac5ac28187e8187794062d0},

issn = {00332151},

year  = {2017},

date = {2017-01-01},

urldate = {2017-01-01},

journal = {Przeglad Geologiczny},

volume = {65},

number = {11},

pages = {1451-1459},

publisher = {Polish Geological Institute},

abstract = {Development of ground water flow, and solute and heat transport models for underground and open-pit mining areas is a challenging and very complex issue. Despite the fact, models play an increasingly common role in mine water management. The aim of the paper is to present and illustrate theoretical aspects and practical strategies facilitating groundwater model set-up for mine sites by means of FEFLOW software. FEFLOW solved governing equations based on finite elements methods, which enables users to create models with very flexible meshing strategies including time-varying geometries. Unstructured and structured mesh generators allow creating very complex geological settings and with complex geometrical designs, as found for example in mine dewatering (open-cast geometry, inclined dewatering wells, inclined faults), or underground structures (pipes, tunnels, shafts etc.). In order to obtain reliable results and reduce uncertainty in provided forecast for mine sites, groundwater models often should be developed for transient condition and involve unsaturated flow and transport, fracture flow, density effects, chemical reactions, or time-varying behaviour of boundary conditions and material properties (such as conductivity or porosity). FEFLOW enables groundwater modeller set-up these all physical processes and via plug-ins extended functionality by integrated FEFLOW models with other models: geochemical (PHREEQC), watershed (MIKE 11, Hydro River) or develop user own plug-ins. Considering the above, FEFLOW seems to be appropriate software for accurate and reliable models development for mine sites, and an interesting alternative for more widely used MODFLOW models in Poland.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-85003914585,

title = {Geochemical and isotopic study to determine sources and processes affecting nitrate and sulphate in groundwater influenced by intensive human activity - carbonate aquifer Gliwice (southern Poland)},

author = { S. Jakóbczyk-Karpierz and S.S. Sitek and R. Jakobsen and A. Kowalczyk},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85003914585&doi=10.1016%2fj.apgeochem.2016.12.005&partnerID=40&md5=28c231569e373260343f591badce2705},

doi = {10.1016/j.apgeochem.2016.12.005},

issn = {08832927},

year  = {2017},

date = {2017-01-01},

urldate = {2017-01-01},

journal = {Applied Geochemistry},

volume = {76},

pages = {168-181},

publisher = {Elsevier Ltd},

abstract = {A multi-species, multi-stable-isotope approach (δ15NNO3; δ18ONO3; δ34SSO4; δ18OSO4; δ18OH2O and δ2HH2O) was used together with environmental tracers (Ar; Ne; CFC-11 and CFC-12) and geochemical modelling to characterize sources and processes controlling concentrations of NO3− and SO42- in groundwater of the carbonate aquifer Gliwice (southern Poland). The study area represents a strongly transformed environment with a range of human activities i.a. Agriculture, urbanization and industry. The δ15NNO3 and δ18ONO3 indicated that most samples contained NO3− of mixed sources: artificial fertilizers, municipal and industrial sewage, while very good correlation between NO3− and CFC-12 suggested that nitrate originated primarily from residential and industrial sewage. Conversely, isotopic composition of sulphate in groundwater suggested agriculture as well as oxidation of sulphides as dominant. The conclusion was supported by the comparison of CFCs and sulphate concentrations which revealed no relevant correlation. Geochemical modelling confirmed the presence of sulphate reduction in areas where isotopic analyses were not possible due to undetectable sulphate. Thus, the integrated application of stable isotopes, environmental tracers, groundwater chemistry and geochemical modelling shows a complex origin of groundwater pollution in the study area as well as variety of geochemical processes controlling chemistry of groundwater in a triple-porosity aquifer influenced by different types of human activity. © 2016 Elsevier Ltd},

note = {38},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84966534225,

title = {Identification of nitrate sources in groundwater and potential impact on drinking water reservoir (Goczałkowice reservoir, Poland)},

author = { J. Czekaj and S. Jakóbczyk-Karpierz and H. Rubin and S.S. Sitek and A.J. Witkowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966534225&doi=10.1016%2fj.pce.2015.11.005&partnerID=40&md5=da0090ddc4ab742d04447948c7cd6418},

doi = {10.1016/j.pce.2015.11.005},

issn = {14747065},

year  = {2016},

date = {2016-01-01},

urldate = {2016-01-01},

journal = {Physics and Chemistry of the Earth},

volume = {94},

pages = {35-46},

publisher = {Elsevier Ltd},

abstract = {Goczałkowice dammed reservoir (area – 26 km2) is a strategic object for flood control in the Upper Vistula River catchment and one of the most important source of drinking water in the Upper Silesian Industrial Region (Southern Poland). Main aims of the investigation were identification of sources of nitrate and assessment of their significance in potential risk to groundwater quality. In the catchment area monitoring network of 22 piezometers, included 14 nested, have been installed. The significant spatial and seasonal differences in chemical composition between northern and southern part of the catchment were indicated based on the groundwater sampling conducted twice – in autumn 2011 and spring 2012. Maximum observed concentrations of nitrate were identified in northern part of the study area 255 mg/L as a results of inappropriate sewage management and agriculture activity. Results, based on the combines multi-scale hydrogeological and hydrochemical field studies, groundwater flow and transport modelling, dual stable isotope approach and geochemical modelling indicate mainly agriculture and inappropriate sewage water management as a sources of NO3− contamination of groundwater which moreover is affected by geochemical processes. In general, contaminated groundwater does not impact surface water quality. However, due to high concentration of nitrate in northern part a continues measurements of nitrogen compounds should be continued and used for reducing uncertainty of the predictive scenarios of the mass transport modelling in the study area. © 2015 Elsevier Ltd},

note = {19},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84923789475,

title = {Modified Multi-phase Stability Diagrams: An AMD Case Study at a Site in Northumberland, UK [Geänderte Mehrphasen- Stabilität Diagramme: Eine AMD Fallstudie an Einem Aufstellungsort in Northumberland, Großbritannien]},

author = { K. Samborska and S.S. Sitek and S.H. Bottrell and O. Sracek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923789475&doi=10.1007%2fs10230-013-0223-y&partnerID=40&md5=91d9b7d95e5f06220faf1a2849dceaf6},

doi = {10.1007/s10230-013-0223-y},

issn = {10259112},

year  = {2013},

date = {2013-01-01},

urldate = {2013-01-01},

journal = {Mine Water and the Environment},

volume = {32},

number = {3},

pages = {185-194},

publisher = {Springer Verlag},

abstract = {The weathering of sulphide minerals within spoil heaps causes the release of sulphate and environmentally hazardous metal ions. Newly-formed species can subsequently precipitate as highly soluble, secondary sulphate minerals, which, in turn, might be flushed by dilute recharge water or eventually transformed into more stable minerals. These processes determine which components are retained in the spoil as immobile solid phases and which (and when) others are released into the wider aquatic environment. To elucidate this sequence of mineral formation and transformation, we studied mineral-fluid equilibria in a major abandoned coal mine spoil heap at the former Shillbottle Colliery, Northumberland, UK. The investigations focussed on stability of iron minerals produced during the acid mine drainage process. The multi-component Phreeplot-calculated pE/pH diagrams reveal that many post-mining secondary minerals may co-exist, in contrast to what is indicated by the more commonly used charts. Being able to visualize the mutual stability of these minerals under specific chemical and physical conditions might aid understanding of formation and transformation mechanisms. © 2013 Springer-Verlag Berlin Heidelberg.},

note = {6},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-84870752949,

title = {Reconstructing subglacial drainage of Werenskiold Glacier (SW Spitsbergen) based on numerical modelling [Rekonstrukcja drenażu subglacjalnego lodowca Werenskiolda (SW Spitsbergen) na podstawie modelowania numerycznego]},

author = { A.M. Piechota and S.S. Sitek and D. Ignatiuk and J.A. Piotrowski},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870752949&partnerID=40&md5=ffcd586c944f696e7b5046e0e507fffa},

issn = {08676143},

year  = {2012},

date = {2012-01-01},

urldate = {2012-01-01},

journal = {Biuletyn - Panstwowego Instytutu Geologicznego},

number = {451},

pages = {191-202},

abstract = {The paper attempts to describe subglacial drainage of the Werenskiold Glacier based on numerical modelling using FEFLOW software version 6.0. The model covers 36.2 km2 of a polythermal glacier basin, 75% of which is filled with ice (27.1 km2). Numerical modelling was preceded by field research carried out on Werenskiold during the summers of2009-2011. The model illustrates the subglacial drainage in a ground moraine layer and the top of the bedrock. Permafrost and active layer of a maximum thickness of 2 m under the glacier snout and in its forefield were assumed (Replewska-Pȩkalowa; 2004). The aim of this study was to obtain the subglacial groundwater flow field and the spatial distribution of hydraulic pressures beneath the glacier and in its forefield. The spatial distribution of hydraulic pressure and groundwater flow paths beneath the glacier are controlled by its geometry (thickness), thermal conditions, the amount of ablation and rainfall water, and the hydrogeological parameters of the bed. The water flux in the ablation season in the aquifer under the glacier and in its forefield was estimated at 4624 m 3/day, what corresponds to 8% of the seasonal ablation water and rainfall (5% of which drains through the sediments under the glacier). The remaining 92% of the ablation water is evacuated through inand subglacial channel system.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-80055070740,

title = {Occurrence of trichloroethene and tetrachloroethene in groundwater in tarnowskie góry area [Wystepowanie trichloroetenu i tetrachloroetenu w wodach podziemnych w rejonie tarnowskich gór]},

author = { S.S. Sitek and Andrzej Kowalczyk},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-80055070740&partnerID=40&md5=0b53a2f02bd59175fa74c82a55f19753},

issn = {08676143},

year  = {2011},

date = {2011-01-01},

urldate = {2011-01-01},

journal = {Biuletyn - Panstwowego Instytutu Geologicznego},

number = {445 PART 2},

pages = {633-642},

abstract = {Trichloroethene (TCE) and tetrachloroethene (PCE) contamination have been monitored in water of Triassic carbonate aquifer in Tarnowskie Góry area since 1994. The source of the contamination is industry, located in the Tarnowskie Góry, what has been confirmed by spatial distribution of TCE and PCE concentration in the aquifer and maximum concentration observed in the city and immediate vicinity. The concentrations of TCE and PCE decrease with increase distance from Tarnowskie Góry in the west, south-west and north-west direction. The results demonstrate that contamination plume is spreading out up to 15 km in the west direction from the source of the contamination. Confirmation of migration of these constituents is continuous increase of TCE and PCE concentrations in the water from wells uncontami-nated at the beginning of the research studies. The paper summarizes results of the investigation for years 1994 to 2010. It was indicated that important role in spreading the TCE and PCE in the groundwater play geological structure, hydrodynamic and hydrogeochemical properties of the Triassic carbonate aquifer. Reliable prediction of temporal and spatial TCE and PCE concentration changes require to take into consideration all mentioned above factors.},

note = {4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-78650117223,

title = {Impact assessment of municipal landfill in tychy on groundwater environment - modelling study [Ocena oddziaŁywania skŁadowiska odpadów komunalnych w tychach na środowisko wód podziemnych w świetle badań modelowych]},

author = { S.S. Sitek and A.J. Witkowski and A. Kowalczyk and A.M. Zurek-Pucek},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-78650117223&partnerID=40&md5=316e76c3382513357b701345abf52ef7},

issn = {08676143},

year  = {2010},

date = {2010-01-01},

urldate = {2010-01-01},

journal = {Biuletyn - Panstwowego Instytutu Geologicznego},

number = {442},

pages = {147-152},

abstract = {The municipal landfill in Tychy-Urbanowice consists of three sites, the old one closed in 1994 and two others in use. The old part, against two other ones, is not lined and, as a result, the landfill leachate deteriorates the quality of groundwater. The objective of the modelling study was to apply 3D transport modelling for assessment and prediction of municipal landfill impact within the Quaternary aquifer. The transient transport models using FeFlow software have been constructed. For single-species transport model boron has been chosen. The results indicate that the contamination plume of boron has been moved downstream from the old landfill towards the Gostynia River. The plume is currently about 750 meters long and 250 meters wide. The highest concentration of boron is 13 mg/1 under the old landfill and, as a result of dispersion, concentration decreases to 1-2 mg/l at the distance of 300 meters downwards from the old landfill, what was confirmed by both model simulation and monitoring network observation. The predictions made on the model show that contamination plume still spreads and higher level concentration of boron will be observed downstream from the old landfill site.},

note = {9},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{2-s2.0-70350509612,

title = {High-resolution 3d structural model of major groundwater basin (mgwb) gliwice no 330 [SzczegóŁowy model struktury 3d zbiornika gzwp gliwice nr 330]},

author = { S.S. Sitek and A. Kowalczyk and Z. Malolepszy},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-70350509612&partnerID=40&md5=9ae5f34774c8ae8c01cefc9e61a2cc9b},

issn = {08676143},

year  = {2009},

date = {2009-01-01},

urldate = {2009-01-01},

journal = {Biuletyn - Panstwowego Instytutu Geologicznego},

number = {436},

pages = {463-468},

publisher = {Polish Geological Institute},

abstract = {Construction of multilayer numerical models in a karst-fractured medium creates big difficulties in the correct and credible presentation of groundwater flow systems. Presentation of geometric groundwater medium using data from 2D geological maps, bore holes and geological cross-sections can be insufficient without acute interpretation of deep geological structure. Applications of new techniques of computer 3D geological modelling helps better mapping and understand deep geological structure. In the paper 3D geological model of MGWB Gliwice is presented. Geological model has been developed using Earth Vision software. Possibility of presenting 3D hydrogeological formation in geological structure model with many horsts and grabens separated by faults will be have significantly influenced on correctness digitizing hydrogeological medium structure in the flow model FeFlow.},

note = {5},

keywords = {},

pubstate = {published},

tppubtype = {article}

}