| Kupa / Kolpa | |
|---|---|
_(2).jpg) River valley fromKozice | |
 Kupa River watershed (interactive map) | |
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| Location | |
| Countries | |
| Physical characteristics | |
| Source | |
| • location | Razloge,Gorski kotar,Croatia |
| • coordinates | 45°29′28″N14°41′20″E / 45.491°N 14.689°E /45.491; 14.689 |
| • elevation | 313 metres (1,027 ft)[3] |
| Mouth | |
• location | Sava,Sisak,Croatia |
• coordinates | 45°27′36″N16°24′08″E / 45.46000°N 16.40222°E /45.46000; 16.40222 |
| Length | 297.4 km (184.8 mi)[1][2] |
| Basin size | 10,226 km2 (3,948 sq mi)[1] |
| Discharge | |
| • average | 283 m3/s (10,000 cu ft/s) |
| Basin features | |
| Progression | Sava→Danube→Black Sea |
TheKupa (Croatian pronunciation:[kûpa]) orKolpa (Slovene pronunciation:[ˈkóːlpa] or[ˈkóːwpa]; fromLatin:Colapis inRoman times;Hungarian:Kulpa) river, a right tributary of theSava, forms a natural border between north-westCroatia and southeastSlovenia. It is 297 kilometres (185 miles) long,[1] with a length of 118 km (73 mi) serving as the border between Croatia and Slovenia[3] and the rest located in Croatia.[4]
The nameColapis, recorded inantiquity, is presumed to have come from theProto-Indo-European roots*quel- 'turn, meander' and*ap- 'water', meaning 'meandering water'. An alternative interpretation is*(s)kel-/*skul- 'shiny, bright', meaning 'clear river'.[5]
The Kupa originates in Croatia in the mountainous region ofGorski Kotar, northeast ofRijeka, in the area ofRisnjak National Park. It flows a few kilometers eastwards, receives the smallČabranka River from the left, before reaching the Slovenian border.
It then continues eastwards between theWhite Carniola region in the north andCentral Croatia in the south. The Kupa receives influx from the riverLahinja from the left inPrimostek, passesVrbovsko, and eventually detaches from the Slovenian border having passedMetlika.
It then reaches the city ofKarlovac, where it receives influx from two other rivers from the right,Dobra andKorana (which in turn is joined byMrežnica). The Kupa continues flowing to the east, where it merges withGlina from the right, it then passes through two small towns called Šišinec and Brkiševina, and then proceeds to the town ofSisak where it merges withOdra from the left and, after passing through Sisak town centre, flows into the Sava River.
Fairly unpolluted downstream to Karlovac, the upper Kupa is a popular place for bathing in summer. The section fromStari Trg down toFučkovci since 2006 is part of the Slovenian Krajinski park Kolpa nature reserve.
The hydrological parameters of the Kupa are regularly monitored atRadenci,Kamanje,Karlovac,Jamnička Kiselica andFarkašić.[6]
In 1899, the notary ofBrod, M. Pavelić, set out to excavate an easier path down to the source of the Kupa.[7]
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