In Russia more than 2.8 million rivers with a total length of 12.4 million km, the total annual river discharge is 4 218.7 km³ (of which 90 % are basins of the Arctic and Pacific oceans). The number of rivers with length more than 500 km (the so-called big rivers) 214 (0.008 % of the total number of rivers), the number of medium-size rivers (length from 101 km to 500 km) is 2 833 (0.1 % of total), 133 503 rivers, 046 2 843 km of the total length of the falls on the river and streams with the length from 10 to 100 km of watercourses, up to 10 km there are 2 559 454 total length of 5 118 642 km The most full-flowing rivers (in terms of the average annual runoff) are: Yenisey (635 km³), Lena (537 km³), Ob (405 km³), Amur (378 km³), Volga (28 km³). Rivers in Russia has traditionally played a huge role not only as a transport route, but as the track settlement and economic development of new territories. On the rivers built almost all the major cities