Groundwater under strong inflence of surface water – case study from Črneče (Northern Slovenia)

Abstract

The article presents an analysis of the nine-year long data set of groundwater levels measurements in the inflence area of the Drava River in Črneče in the southern Koroška (Carinthia – N Slovenia). Statistical analysis of the groundwater levels flctuations, flw rates and stages of the Drava River were performed. It is followed by analysis of the interrelation between the groundwater level observations and mutual comparison between the groundwater level and river stages. Particular emphasis is placed on the analysis of the impact of extreme flod event on 05.11.2012 on groundwater levels, which caused catastrophic floding throughout the whole Slovenian part of the Drava River Valley. With the help of groundwater level maps it is illustrated that in the hyporeic zone of the river intensive change in the distribution of groundwater flw fild is undergoing. We are dealing with both the inflw of river water in the aquifer, as the outflw of groundwater into the river, and sometimes with the flw of groundwater which is parallel to the river bank.

Keywords

• groundwater level maps
• groundwater flw direction
• hyporeic zone
• flods