Sava

The Sava is a river in Central and Southeast Europe, and the Danube's right and longest tributary. It flows through Slovenia, Croatia, and along its border with Bosnia and Herzegovina before entering the Danube in Serbia's capital, Belgrade. The Sava serves as the main northern limit of the Balkan Peninsula and the southern boundary of the Pannonian Plain.

The Sava River runs for 990 kilometers (615 miles), including the 45-kilometer (28-mile) Sava Dolinka headwaters in Zelenci, Slovenia. It is the Danube's largest tributary in terms of volume of water and, after the Tisza, the second-largest in terms of catchment area (97,713 square kilometers (37,727 square miles)) and length. It drains a large part of the Dinaric Alps region via the major tributaries Drina, Bosna, Kupa, Una, Vrbas, Lonja, Kolubara, Bosut, and Krka. The Sava is one of Europe's longest rivers and one of the longest tributaries of another river.

The Sava River basin has an estimated population of 8,176,000 people, which is shared by three capital cities: Ljubljana, Zagreb, and Belgrade. The Sava is navigable by larger vessels for about 23 kilometers, beginning at the confluence of the Kupa in Sisak, a few kilometers below Zagreb.

Length: 992 km (616 mi)