Vistula: 700

ASIA.
Yeneisy and Selenga: 3,580
Kiang: 3,290
Hoang Ho: 3,040
Amoor: 2,500
Euphrates: 1,900
Ganges: 1,850
Tigris: 1,160

AFRICA.
Nile: 3,240
Niger: 2,400
Gambia: 1,000

SOUTH AMERICA.
Amazon and Beni: 4,000
Platte: 2,700
Rio Madeira: 2,300
Rio Negro: 1,650
Orinoco: 1,600
Uruguay: 1,100
Magdalena: 900

NORTH AMERICA.
Mississippi and Missouri: 4,300
Mackenzie: 2,800
Rio Bravo: 2,300
Arkansas: 2,070