Soča (Slovene:[ˈsoːtʃa], in Slovene) or Isonzo (Italian:[iˈzontso], in Italian; other names: Friulian: Lusinç; German: Sontig; Latin: Aesontius or Isontius[3]) is a 138-kilometre (86 mi) long river that flows through western Slovenia (96 kilometres or 60 miles) and northeastern Italy (43 kilometres or 27 miles).[1]
The river was recorded in antiquity as Aesontius, Sontius, and Isontius. Later attestations include super Sontium (in 507–11), a flumine Isontio (1028), in Lisonçum (1261), an die Ysnicz (1401), and an der Snicz (ca. 1440). The Slovene name Soča is derived from the form *Sǫťa, which was borrowed from Latin (and Romance) Sontius. In turn, this is probably based on the substrate name *Aisontia, presumably derived from the PIE root *Hei̯s- 'swift, rushing', referring to a quickly moving river. Another possible origin is the pre-Romance root *ai̯s- 'water, river'.[5]
Major changes in the watershed
Course of the Soča/Isonzo
The present course of the river is the result of several dramatic changes that occurred during the past 2,000 years. According to the Roman historian Strabo, the river named Aesontius, which in Roman times flowed past Aquileia to the Adriatic Sea, was essentially the Natisone and Torre River system.[6]
In 585, a landslide cut off the upper part of the Natisone riverbed, causing its avulsion and subsequent stream capture by the Bontius River. The original subterranean discharge of the Bontius into the Timavo River became obstructed, and another avulsion returned the new watercourse into the bed of the lower Natisone.
During the next centuries the estuary of this new river—the Soča—moved eastward until it captured the short coastal Sdobba River, through which the Isonzo now discharges into the Adriatic Sea. The former estuary (of the Aesontius, and the early Isonzo) in the newly formed lagoon of Grado became an independent coastal rivulet.[7]
Attractions
The Isonzo River in ItalyThe Soča RiverRecreation on the Soča River near Trenta, Slovenia
Due to its emerald-green water, the river is marketed as "The Emerald Beauty." It is said to be one of the rare rivers in the world that retain such a colour throughout their length.[8]Giuseppe Ungaretti, one of the greatest Italian poets, describes the Isonzo in the poem "The Rivers".
The river is also well known for the marble trout (Salmo marmoratus); this species is native to rivers of the northern Adriatic basin, and it lives in the upper course of the river. This species is endangered due to the introduction of other non-indigenous trout species sometime between World War I and World War II.[10]
The Soca Valley is a popular tourist destination due to its numerous natural attractions, including the Big Soča Gorge (Velika korita Soče), the Little Soča Gorge (Mala korita Soče), Kozjak Falls, Virje Falls, and the Tolmin Gorges (Tolminska korita).
Significance in World War I
The valley was the stage of major military operations including the twelve battles of the Isonzo on the Italian front in World War I between May 1915 and November 1917, in which over half a million Austro-Hungarian and Italian soldiers lost their lives.[11][12]
The Isonzo campaign comprised the following battles:
^Richard J.A. Talbert, ed. (2000). Barrington Atlas of the Greek and Roman World: Map-By-Map Directory. Vol. I. Princeton, NJ and Oxford, UK: Princeton University Press. p. 273. ISBN0691049459.
The Walks of Peace in the Soča Region Foundation. The Foundation preserves, restores and presents the historical and cultural heritage of the First World War in the area of the Isonzo Front for the study, tourist and educational purposes. (in Slovene, English, Italian, and German)
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