EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Study of groundwater vulnerability in three unconfined aquifers in Slovenia

Miha Curk1, Matjaž Glavan1, Joseph Adu-Gyamfi2, Janine Halder3, Sonja Cerar4, and Vesna Zupanc1
Miha Curk et al.
  • 1University of Ljubljana, Biotechnical faculty, Department of agronomy, Ljubljana, Slovenia (
  • 2IAEA, Soil and Water Management and Crop Nutrition Section, Vienna, Austria
  • 3IAEA, Department of Nuclear Sciences and Applications, Vienna, Austria
  • 4Geological survey, Ljubljana, Slovenia

Groundwater is the main source of drinking water in Slovenia, but nitrate pollution originating from agriculture and urban areas is threatening its quality in several areas of the country. The aim of this study is to assess the vulnerability of three different unconfined aquifers in Slovenia (Ljubljansko polje, Dravsko-ptujsko polje and Krško-brežiško polje). All three study areas are located on alluvial plains with shallow groundwater levels and similar soil types, but different ratios of urban and agricultural land use. Soil types and land use were analyzed in each area as they contribute strongly to leaching of nitrate. Along with this we performed the analysis of stable isotopes of O, H and N to determine the origin of groundwater recharge and trace the possible sources of nitrate pollution. Results will give us an overview of nitrate pollution pathways through better understanding of nitrate sources, vulnerable areas, and groundwater recharge characteristics.

How to cite: Curk, M., Glavan, M., Adu-Gyamfi, J., Halder, J., Cerar, S., and Zupanc, V.: Study of groundwater vulnerability in three unconfined aquifers in Slovenia, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-7028,, 2020