The Timavo River, known in Slovene as the Timava or Timav, is a 2-km river in the Province of Trieste. It has four sources near San Giovanni (Slovene: Štivan) near Duino (Slovene: Devin) and outflows in the Gulf of Panzano (part of the Gulf of Trieste) three kilometers southeast of Monfalcone (Slovene: Tržič), Italy.
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.
An Italian passenger liner called the Timavo ran aground during the Second World War on the east coast of South Africa near Cape Vidal. The engine of the wreck is still visible from the beach, now situated within the Isimangaliso Wetland Park.
- Civita, M., Cucchi, F., Eusabio, A., Garavoglia, S., Maranzana, F., Vigna, B. "The Timavo hydrogeologic system: an important reservoir of supplementary water resources to be reclaimed and protected." Acta Carsologica, 24, 169-186 (1995). Available online: http://carsologica.zrc-sazu.si/Celestevilke/arhiv/ac24.pdf
- LTER Slovenia summarizes the science performed to date: http://lter.zrc-sazu.si/ProjectOverview/tabid/350/Default.aspx
- Virgil Aeneid 1.244-6
- Timava : skrivnostna reka, Massimo Gasparini; občina Devin Nabrežina, 2005 (Slovene)
- Timavo : esplorazioni e studi, Trst, Societa alpina delle Giulie, 1999 (Italian)
- Reka - Timav. Podobe, zgodovina in ekologija kraške reke, Ljubljana, Mladinska knjiga, 1990 (Slovene)
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