Una (Sava)

Una
The Štrbački buk waterfall on the Una river
Una mouth (confluence with the Sava)
Etymology	Latin una - one, unique
Location
Countries	Croatia Bosnia and Herzegovina
Physical characteristics
Source	Vrelo Une
• location	Donja Suvaja
• coordinates	44°23′58″N 16°06′14″E / 44.399457°N 16.103796°E / 44.399457; 16.103796
• elevation	358,850 m (1,177,330 ft)
Mouth	Sava
• location	Jasenovac
• coordinates	45°16′12″N 16°55′05″E / 45.270°N 16.918°E / 45.270; 16.918
• elevation	95 m (312 ft)
Length	214.6 km (133.3 mi)
Basin size	10,200 km2 (3,900 sq mi)
Discharge
• location	Mouth
• average	240.3 m3/s (8,490 cu ft/s)
• minimum	40.95 m3/s (1,446 cu ft/s)
• maximum	1,500 m3/s (53,000 cu ft/s)
Basin features
Progression	Sava—Danube—Black Sea
River system	Sava basin
Population	620.373
Tributaries
• left	Ostrovica Dobrenica Klokot
• right	Unac Sana Krušnica
Waterfalls	Štrbački buk Milančev buk Troslap Dvoslap Ripački slap Slapovi Sunca Mujin slap Amerikančevi slapovi Brvice buk Buk i brzaci Jotanovih otoka Kostela Kanjon Grmuše

The Una (Serbian Cyrillic: Уна, pronounced [ûna]) is a border river between Bosnia and Herzegovina and Croatia and a right tributary of the Sava river.^[1] It is part of the Black Sea drainage basin, and its watershed has a size of 10,200 km² (3,900 sq mi), of which 8,080 km² (3,120 sq mi) belongs to Bosnia and Herzegovina, and 2,120 km² (820 sq mi) to Croatia. The total length of the river is 212 km (132 mi).^[2] The source of the river is located near the village of Donja Suvaja in Croatia, and its mouth is located near the village of Jasenovac, on the border with Bosnia. The largest right tributaries are the Krka, Unac, Krušnica and Sana rivers, and the largest left tributary is the Klokot river. Its longest headwater is the Unac river. The largest and most important city located on the river is Bihać. Other, important cities and towns are Bosanska Krupa, Bosanski Novi and Bosanska Kostajnica. The river is characterized by a multitude of waterfalls, rapids, karst springs and relatively untouched nature. A large part of the upper river is part of the Una National Park.