The Tagliamento river is considered as the last morphologically intact river in the Alps. (Its course has not been altered by human intervention.)[1][2] For this reason, it has been the subject of many scientific investigations into its peculiar characteristics: these include its 150 km long corridor which connects theAlps and theAdriatic Sea, its unconstrained floodplain, which hosts several aquatic and terrestrial habitats, and its over 600 islands.[1]
The watershed covers an area of 2,916 square kilometres (1,126 sq mi) with a population of approximately 165,000. The watershed lies almost entirely inCarnia and the other mountain valleys of Friuli. 86.5% of the watershed is in theProvince of Udine.
The source is at an elevation of 1,195 metres (3,921 ft) in theVeneto region (Lorenzago di Cadore) in theProvince of Belluno near the border with theProvince of Udine, north-west ofForni di Sopra close to the Mauria Pass.Initially, the river's course is in a west to east direction, parallel to theCarnic Alps range. The first tributary of note is theLumiei, which enters the Tagliamento from the left at a distance of 26 kilometres (16 mi) from the source.
The river passes throughPinzano and courses in a southward direction, while spreading across the plain reaching a width of 3 kilometres (1.9 mi) nearSpilimbergo and splitting into a number of branches. Its gravelly bed is very permeable, and it absorbs almost all its waters, but the river recovers most of the flow downstream ofCodroipo andCasarsa, thanks to abundant flows from underground rivers. From here onwards, the river bed distinctly narrows to 180 metres (590 ft) and starts to meander because of the reduced slope.Before ending its course, the river receives the waters of a small underground river, theVarmo. Finally, the river flows into theAdriatic Sea betweenLignano andBibione.
In addition to theItalian nameTagliamento, the river is known by different names in other languages of the region. TheStandard Friulian name for the river isTiliment; other local variants includeTaiament,Tilimint,Tiument,Timent, andTuement.[3] InVenetian, the river is known asTajamento; inSlovene, asTilment; and inLatin, asTiliaventum[4] orTaliamentum. It was known asDülmende inGerman during the Middle Ages.
^Richard J.A. Talbert, ed. (2000).Barrington Atlas of the Greek and Roman World: Map-By-Map Directory. Vol. I. Princeton, New Jersey and Oxford, UK: Princeton University Press. p. 279.ISBN0691049459.
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