Hydrogeochemistry of Coastal Carbonate Aquifer in Lucija–Portorož (Gulf of Trieste, Northern Adriatic Sea, Slovenia)
DOI:
https://doi.org/10.3986/ac.v38i2-3.122Povzetek
The 801 m deep artesian borehole Lu-1 in Lucija near Portorož (SW Slovenia) was drilled in 1994 on the coast. The borehole is constructed in flysch in the upper 257 m and continues in limestone below that depth. The groundwater has a very distinct chemistry. High concentrations of iron (10.4 mg/l), sulphide (15 mg/l), and chloride (6700 mg/l) are representative showing that mixing of seawater (31%) and groundwater (69%) under highly reducing conditions is present in the confined carbonate aquifer. Groundwater flow is extensive and deep, fed by higher elevation precipitation to the northeast.
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