SOUTH AMERICA: International River Basin register
(updated August 2012)


AFRICA | ASIA | EUROPE | NORTH AMERICA | SOUTH AMERICA || Footnotes | Documentation
Basin Name Total area of basin (sq. km) (1)   Country name Area of country in basin (sq. km) Percent area of basin in country (%)

Amacuro 5,600 Venezuela 4,900 87
  Guyana 700 13
 
Amazon (44) 5,883,400 Brazil 3,670,300 62
  Peru 956,500 16.26
  Bolivia 706,700 12
  Colombia 367,800 6
  Ecuador 123,800 2
  Venezuela 40,300 1
  Guyana 14,500 <1
  Suriname 1,400 <1
  French Guiana 30 <1
 
Aviles 300 Argentina 200 89
  Chile 30 11
 
Aysen 13,600 Chile 13,100 96
  Argentina 500 4
 
Baker 30,800 Chile 21,000 68
  Argentina 9,800 32
 
Barima 2,100 Guyana 1,100 52
  Venezuela 1,000 44
 
Cancoso/Lauca 23,500 Bolivia 20,200 86
  Chile 3,400 14
 
Carmen Silva/Chico 1,700 Argentina 1,000 59
  Chile 700 41
 
Catatumbo 31,000 Colombia 19,600 63
  Venezuela 11,400 37
 
Chira (44) 15,700 Peru 9,800 62
  Ecuador 5,800 38
 
Chuy 200 Brazil 100 75
  Uruguay 60 25
 
Comau 900 Chile 900 89
  Argentina 80 11
 
Corantijn/Courantyne (45) 41,800 Guyana 21,700 52
  Suriname 19,900 48
  Brazil 80 <1
 
Cullen 600 Chile 500 83
  Argentina 100 17
 
Essequibo (46) 239,500 Guyana 162,100 68
  Venezuela 52,400 22
  Suriname 24,300 10
  Brazil 200 <1
 
Gallegos-Chico 11,600 Argentina 7,000 61
  Chile 4,600 39
 
Jurado 700 Colombia 500 71
  Panama 100 29
 
La Plata (47, 48) 2,954,500 Brazil 1,379,300 47
  Argentina 817,900 28
  Paraguay 400,100 14
  Bolivia 245,100 8
  Uruguay 111,600 4
 
Lagoon Mirim 55,000 Uruguay 31,200 57
  Brazil 23,800 43
 
Lake Fagnano (49) 3,200 Argentina 2,700 85
  Chile 500 15
 
Lake Titicaca-Poopo System 111,800 Bolivia 63,000 56
  Peru 48,000 43
  Chile 800 1
 
Maroni (50) 65,000 Suriname 37,500 58
  French Guiana 27,200 42
  Brazil 200 <1
 
Mataje 700 Ecuador 500 71
  Colombia 200 29
 
Mira 12,100 Colombia 6,200 52
  Ecuador 5,800 48
 
Oiapoque/Oyupock 23,300 French Guiana 13,700 60
  Brazil 9,500 40
 
Orinoco 927,400 Venezuela 604,500 65
  Colombia 321,700 35
  Brazil 800 <1
 
Palena 13,300 Chile 7,300 55
  Argentina 6,000 45
 
Pascua 13,700 Chile 7,300 54
  Argentina 6,400 46
 
Patia 21,300 Colombia 20,800 98
  Ecuador 500 2
 
Puelo 8,400 Argentina 5,500 66
  Chile 2,900 34
 
Rio Grande (South America) 8,000 Argentina 4,000 50
  Chile 4,000 50
 
San Martin 700 Chile 600 88
  Argentina 80 12
 
Seno Union/Serrano 6,500 Chile 5,700 90
  Argentina 700 10
 
Tumbes-Poyango (44) 5,000 Ecuador 3,600 71
  Peru 1,400 29
 
Valdivia 15,000 Chile 14,700 99
  Argentina 100 1
 
Yelcho 11,100 Argentina 6,900 62
  Chile 4,200 38
 
Zapaleri (51) 2,600 Chile 1,600 58
  Argentina 500 20
  Bolivia 500 22
 
Zarumilla (44) 4,300 Ecuador 3,400 79
  Peru 900 21