22-27 September 2019
Trade Fairs and Congress Center (FYCMA)
Europe/Madrid timezone

Spatial and statistical analysis of factors influencing groundwater vulnerability on the study area of the Gömör-Torna Karst (Hungary and Slovakia)

26 Sep 2019, 17:30
15m
Conference room 1.A ()

Conference room 1.A

Oral Topic 5 - Tools, methods and models to study groundwater Parallel

Speaker

Veronika Iván (Eötvös Loránd Universtity, Department of Geology, Budapest, Hungary)

Description

The Gömör-Torna Karst (known also as Aggtelek Karst and Slovak Karst) is an unconfined transboundary aquifer located on the border of Hungary and Slovakia. Thanks to its complex natural heritage, which includes surface karst forms, caves and sinkholes, the region is under the protection of the Aggtelek National Park and the Slovak Karst National Park. The aquifer consists of karstified Triassic carbonates, partially covered with Quaternary clayey sediments. The karst springs provide the drinking water for the inhabitants of the area. The high sensitivity of these resources thus requires an effective and accurate protection strategy.
In the past decades, the Gömör-Torna Karst was in the focus of numerous studies, including hydrogeological investigations and local-scale groundwater vulnerability assessments. For the significant springs of the area records of long term daily observations (1964-1993) are available. This detailed hydrometeorological database provides an appropriate base for data-driven analysis of the factors influencing groundwater vulnerability.
The Weights of Evidence (WofE) technique is a well-known spatial statistical method successfully applied for mineral exploration, landslide hazard zonation, groundwater productivity potential or vulnerability assessment. WofE is a method based on the Bayesian conditional probability, which enables observations of the individual role and the combined effect of different geological, geophysical or geochemical features to assess the spatial distribution of a natural phenomenon.
Here, we attempt to apply the WofE technique for: i) the evaluation of factors influencing the spring distribution in the karst area and ii) the assessment of a reliable groundwater vulnerability map. The spatial statistical analysis can provide a reliable support in the evaluation of geological and hydrogeological factors influencing groundwater vulnerability in the karst system.
. This result is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 810980”.

Primary authors

Dr Judit Mádl-Szőnyi (Eötvös Loránd University, Department of Geology, Budapest, Hungary) Licia Pollicino (Dipartimento di Scienze della Terra "A. Desio", Università degli Studi di Milano, Via Luigi Mangiagalli, 34, Milan, 20133, Italy) Marco Masetti (Università degli Studi di Milano) Dr Stefania Stevenazzi (Dipartimento di Scienze della Terra "A. Desio", Università degli Studi di Milano, Via Luigi Mangiagalli, 34, Milan, 20133, Italy) Veronika Iván (Eötvös Loránd Universtity, Department of Geology, Budapest, Hungary)

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