The Danube River Basin Length of the Danube:2,780 km Navigable length of the Danube:2,412 km Annual water discharge 202 bn m3 into the Black Sea: (6,460 m3/sec average) Size of the basin:801,463 km2 (almost 10% of continental Europe) Inhabitants:81 million Number of states:18 Size of the Danube Delta:679,000 ha Main tributaries of the Danube:Tisza, Sava, Inn, Norava, Drava, Velika Morava, Iskar, Siret, Prut
{}