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Sava(sä`vä), Hung. Száva, c.580 mi (930 km) long, rising in two headstreams in the Julian Alps, Slovenia, and flowing generally SE past Ljubljana and Zagreb, Croatia, then forming part of the border between Croatia and Bosnia and Herzegovina, and through Serbia to the Danube River at Belgrade. The Drina is its chief tributary. The Sava is navigable to Sisak; its valley is an important transportation corridor. The Sava basin is a fertile agricultural region.
a river in northern Yugoslavia, a right tributary of the Danube. It is 940 km long and drains an area of approximately 95,000 sq km. The Sava, which originates from two sources in the Julian Alps, flows in the mountains in a narrow valley until it reaches Zagreb. The river’s middle and lower courses run along the southern edge of the Middle Danube Plain; here the river’s meanders are pronounced and for a long distance the channel is flanked by the natural levees formed by floods. The width of the channel near Zagreb is approximately 100 m, and at the mouth it is 280 m. The Sava’s main tributaries, the Kupa, Una, Vrbas, Bosna, and Drina, all empty into its right bank. The Sava has the highest water level of all the Danube’s tributaries. Its mean flow rate at the mouth is 1,760 cu m per sec, with maximum rates exceeding 5,000 cu m per sec. High water occurs in winter and spring. The Sava does not freeze over every year. Cargo freighters travel to Sisak (592 km), and passenger ships to Ŝabac (103 km). The Sava’s valley is densely populated and contains the major cities Ljubljana and Zagreb. The city of Belgrade is situated at the river’s mouth.