Geophysical investigations in the Radovna River Spring area (Julian Alps, NW Slovenia)

Geologija

关键词: ground penetrating radar;    seismic reflection method;    radovna spring;    hydrogeology;    aquifer geometry;    glacial valley;    groundwater table;   

DOI  :  10.5474/geologija.2021.014

来源: DOAJ

【 摘 要 】

The Radovna River Valley is located in the north-western part of Slovenia in the Julian Alps, where there is anextensive intergranular aquifer whose depthtopre-Quaternary bedrock isunknown. Therefore, toobtain information about the depth of the valley and the geometry of the aquif er two geophysical methods were used in our study; ground penetrating radar (GPR) and seismic reflection method. The low-frequency GPR method has shown to be useful for determining the depth of the groundwater and the predominant groundwater recharge. Also,thehigh-resolution seismic method provided aninsight aboutthemorphology ofthepre-Quaternary basement with the deepest point at 141 meters below surface. Measurements of hydrogeological parameters such as groundwater level and river discharge measurements were carried out in the study area. Both data analyses showed that groundwater leveland riverdischarge arehighly fluctuatingand rapidly changing, indicating a well-permeable aquifer, implying that such an aquifer is extremely sensitive and vulnerable to extreme climate events. Both the geophysical methods and the hydrogeological information have provided important information aboutthemorphology ofthevalley and thealluvial aquifer, aswell asincreasing theknowledge aboutthe Radovna springs system, which will contribute very important information for future hydrogeological studies.

【 授权许可】

Unknown