Trebišnjica

Trebišnjica
Требишњица
Trebišnjica River
Location
CountryBosnia and Herzegovina
Physical characteristics
SourceTrebišnjica wellsprings group is a system consisting of 3 large karst spring zones, with Dejanova Pećina as primer wellspring
 • locationBileća
 • coordinates42°51′52″N 18°25′17″E / 42.8644525°N 18.4212613°E / 42.8644525; 18.4212613
2nd sourcewellspring Oko
 • locationBileća
 • coordinates42°51′46″N 18°25′22″E / 42.862864°N 18.4227204°E / 42.862864; 18.4227204
3rd sourcewellspring Nikšičko Vrelo
 • locationBileća
 • coordinates42°51′31″N 18°25′29″E / 42.8586959°N 18.4248447°E / 42.8586959; 18.4248447
4th sourcewellspring Čepo, main in Čeplica springs group
 • locationČeplica
 • coordinates42°50′41″N 18°23′46″E / 42.8448369°N 18.3962417°E / 42.8448369; 18.3962417
Mouth1) in Bosnia and Herzegovina: to Neretva River via Lake VrutakKrupaNeretva River; 2) in Croatia via Cavtat HPP; and directly into Adriatic Sea: a) via Ombla near Dubrovačka Rijeka, b) via group of strong undersea springs (Serbo-Croatian: vrulja) near Cavtat.
 • location
Ravno
 • coordinates
42°55′51″N 17°49′56″E / 42.930725°N 17.8321838°E / 42.930725; 17.8321838
Length96.5 km (60.0 mi)
Basin sizeThe Neretva with Trebišnjica
Basin features
ProgressionNeretvaAdriatic Sea

The Trebišnjica (Serbian Cyrillic: Требишњица) is a river in Bosnia and Herzegovina, and the right tributary of the Neretva. Before it was utilized for hydro exploitation via various hydrotechnical interventions and systems with different purposes, Trebišnjica used to be a sinking river, rising and sinking through its course before resurfacing at various places from the Neretva river below the Čapljina to the Adriatic coast, and along the coast from the Neretva Delta to Sutorina.

With a total length of 96.5 km (60.0 mi) above the ground, and roughly another 90 km (56 mi) below the surface, the Trebšnjica river is one of the longest sinking rivers in the world with the total of 187 km (116 mi) above and under the ground. In hydrological terms, it represents a sub-basin within the Neretva river basin.

In classical antiquity, the river was known as the Arion.