Timavo

thumb|right|250px|The source of the Timavo in San Giovanni di Duino The Timavo River, known in Slovene as the ' or ''', is a two-kilometre stream in the Province of Trieste. It has four sources near San Giovanni () near Duino () and outflows in the Gulf of Panzano (part of the Gulf of Trieste) southeast of Monfalcone (), Italy.

==Geography== thumb|upright=1.5|The Reka (solid)-Timavo (dashed) river system of the Croatian, Slovenian, and Italian Karst. Settlements: {| |valign="top"|Croatia 1. Vela Voda |  |valign="top"|Slovenia 2. Ilirska Bistrica 3. Vremski Britof 4. Škocjan |  |valign="top"|Italy 5. Trebiciano 6. Monfalcone 7. Trieste |} The river has a karst character. It receives much of its water through subterranean flow from the Reka River (Slovenia), but tracer studies have shown that other sinking rivers, Vipava, Soča, and Raša also contribute. From modelling results, the Timavo is believed to receive one third of its flow from the Reka and two-thirds of its flow from infiltration of precipitation into the Karst Plateau, and to a lesser extent from the other sinking river sources.