Abstract
The Radovna River is a 19.4 km long river located in the north-western part of Slovenia, which runs almost entirely over the area of Triglav National Park. The bottom of the Valley is filled with fluvioglacial sediments, which represent an unconfined aquifer with karst aquifers in the recharge area consisting of carbonate rocks of the Triassic age. The Radovna River has only few short stream tributaries, which are recharged from the karstic springs. Therefore, the Radovna River is groundwater dominated river. Within this study, simultaneous measurements of discharge were performed. Discharge and electrical conductivity (EC) were shown to increase downstream. In low water conditions, the average increase in discharge was from 88 l/s km-1 to 287 l/s km-1.
Highlights
In Slovenia, most of the drinking water comes from groundwater resources
Because potential water reserves are much greater than used today (Marinko, 1978; Internet 2), and secondly, because the valley is positioned in the Triglav National Park, representing an important natural treasure
The spatial distributions of discharges and electrical conductivity (EC) are plotted as curved lines (Figs. 2 and 4)
Summary
In Slovenia, most of the drinking water comes from groundwater resources. The Radovna River is not a large river, groundwater from its alluvium already supplies three large communities in NW Slovenia: Bled, Gorje and Radovljica. It is important to understand the hydrogeological conditions in the Radovna River valley and its recharge area. The purpose of the present study is to describe hydrogeological phenomena and conditions in the Radovna River. The spatial distribution of discharges in low water conditions along the river course. In low water conditions, only groundwater outflow is presented in the Radovna riverbed, and with the methods applied, possible spatial relations between various contributions to the river flow can be interpreted. During 2006, 2008 and 2009, discharge and electrical conductivity (EC) were measured at several locations along the river
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