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Role of geophysical surveys in the identification of water escape zones from retention lakes: a case study on a selected object in upper Silesia

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dc.abstract.enThe main scientific goal of this work is the presentation of the role of selected geophysical methods (Ground-Penetrating Radar GPR and Electrical Resistivity Tomography ERT) to identify water escape zones from retention reservoirs. The paper proposes a methodology of geophysical investigations for the identification of water escape zones from a retention fresh water lake (low mineralised water). The study was performed in a lake reservoir in Upper Silesia. Since a number of years the administrators of the lake have observed a decreasing water level, a phenomenon that is not related to the exploitation of the object. The analysed retention lake has a maximal depth between 6 and 10 m, depending on the season. It is located on Triassic carbonate rocks of the Muschelkalk facies. Geophysical surveys included measurements on the water surface using ground penetration radar (GPR) and electrical resistivity tomography (ERT) methods. The measurements were performed from watercrafts made of non-metal materials. The prospection reached a depth of about 1 to 5 m below the reservoir bottom. Due to large difficulties of conducting investigations in the lake, a fragment with an area of about 5,300 m2, where service activities and sealing works were already commenced, was selected for the geophysical survey. The scope of this work was: (1) field geophysical research (Ground-Penetrating Radar GPR and Electrical Resistivity Tomography ERT with geodesic service), (2) processing of the obtained geophysical research results, (3) modelling of GPR and ERT anomalies on a fractured water reservoir bottom, and (4) interpretation of the obtained results based on the modelled geophysical anomalies. The geophysical surveys allowed for distinguishing a zone with anomalous physical parameters in the area of the analysed part of the retention lake. ERT surveys have shown that the water escape zone from the reservoir was characterised by significantly decreased electrical resistivities. Diffraction hyperboles and a zone of wave attenuation were observed on the GPR images in the lake bottom within the water escape zone indicating cracks in the bottom of the water reservoir. The proposed methodology of geophysical surveys seems effective in solving untypical issues such as measurements on the water surface.
dc.abstract.plxxx
dc.affiliationUniwersytet Warszawski
dc.contributor.authorMieszkowski, Radosław
dc.contributor.authorWójcik, Emilia
dc.contributor.authorKozłowski, Mikołaj
dc.contributor.authorPopielski, Paweł
dc.date.accessioned2024-01-25T19:28:06Z
dc.date.available2024-01-25T19:28:06Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.volume25
dc.identifier.doi10.2478/SQUA-2018-0009
dc.identifier.issn1641-5558
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/118745
dc.identifier.weblinkhttp://www.czasopisma.pan.pl/dlibra/publication/126079/edition/109993/content
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofStudia Quaternaria
dc.relation.pages121-129
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enground penetrating radar (GPR) method
dc.subject.enelectrical resistivity tomography (ERT) method
dc.subject.enretention lake
dc.subject.enwater reservoir
dc.titleRole of geophysical surveys in the identification of water escape zones from retention lakes: a case study on a selected object in upper Silesia
dc.typeJournalArticle
dspace.entity.typePublication