Unica (river)

Unica

Unica at the Planina confluence
Basin
Main source underground confluence of the Pivka and the Rak in the Planina mountain cave
45°49′11.17″N 14°14′46.51″E / 45.8197694°N 14.2462528°E / 45.8197694; 14.2462528Coordinates: 45°49′11.17″N 14°14′46.51″E / 45.8197694°N 14.2462528°E / 45.8197694; 14.2462528
Source elevation 500 m (1,600 ft)
River mouth Vrhnika
308 m (1,010 ft) (underground)[1]
Countries Slovenia
Physiognomy
Length 20 km (12 mi)
Avg. discharge 13 m³/s (at the source in Planina Cave), 24 m³/s (at the outflow in Vrhnika)

Unica is a river in Slovenia. It starts as the underground confluence[2] of the Pivka and the Rak in the Planina mountain cave. It forms the greatest confluence of underground rivers in Europe. 300 meter further Unica reaches overground near Planina. It then is about 10 km long. It has a northward direction of flow through Planina Polje (Planinsko Polje) over the municipalities of Postojna, Cerknica (Ivanje Selo) and Logatec (Jakovica), where it returns underground.[3] It then flows for about another 10 km underground, emerging 142 m lower[1] in multiple sources near Vrhnika to form the Ljubljanica river.

References

  1. 1 2 http://www.burger.si/Cerknica/PlaninskoPolje/uvod_eng.htm Planinsko polje
  2. ↑ http://www.dedi.si/dediscina/89-planinska-jama dedi.si
  3. ↑ http://www.geopedia.si/Geopedia_en.html#T1193_F5567:10114012_x442141.871_y81796.85149999999_s14_b4 Geopedia.si

External links

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