Natisone

The Natisone (Friulian: Nadison; Slovene: Nadiža; Latin: Natiso) is a 60-kilometre (37 mi) river in Slovenia and Italy.^[1] It flows for some time as a border river between Slovenia and Italy, continues in Slovenia and then crosses the border and continues in Eastern Friuli, in northeastern Italy. It is the main tributary of the Torre and a sub-affluent of the Isonzo. It has a pluvio-nival regime and belongs to the Adriatic Sea Basin.^[2]

Natisone
The Natisone at Cividale del Friuli
Native name	Nadiža (Slovene) Nadison (Friulian)
Location
Country	Italy, Slovenia
Physical characteristics
Source
• location	Punta di Montemaggiore, Julian Prealps
• elevation	415 m (1,362 ft)
Mouth
• location	Torre
• coordinates	45.9453°N 13.3647°E / 45.9453; 13.3647
Length	60 km (37 mi)
Basin size	322 km2 (124 sq mi)
Basin features
Progression	Torre→ Soča→ Adriatic Sea

The Natisone is formed at 415 metres (1,362 ft) above sea level on the border between Friuli and Slovenia by the confluence of two streams: the Rio Bianco (Slovene: Beli potok) and the Rio Nero (Slovene: Črni potok) which spring from the Punta di Montemaggiore and Gabrovec mountains. Before the confluence with the Torre, it passes through the municipalities of Pulfero and Cividale del Friuli.