Oceanic Drainage of the World

The oceans drain approximately 83% of the land in the world. The other 17% – an area larger than the basin of the Arctic Ocean – drains to internal endorheic basins.

Oceanic Drainage of the World

Source: Wikipedia

Basins
1. Atlantic Ocean: 69,800,000 km2 (26,900,000 mi2)
2. Arctic Ocean: 23,100,000 km2 (8,900,000 mi2)
3. Pacific Ocean: 20,300,000 km2 (7,800,000 mi2)
4. Indian Ocean: 19,400,000 km2 (7,500,000 mi2)

Endorheic basins
1. Caspian Sea: 3,626,000 km2 (1,400,000 mi2)
2. Chad basin: 2,497,738 km2 (964,382 mi2)
3. Aral Sea: 1,618,750 km2 (625,000 mi2)
4. Lake Eyre Basin: 1,200,000 km2 (460,000 mi2)
5. Lake Chad (New Conventional Basin): 1,035,000 km2 (400,000 mi2)
6. Tarim basin: 906,500 km2 (350,000 mi2)
7. Okavango River/Okavango Delta: 721,258 km2 (278,479 mi2)
8. Lake Balkhash: 512,015 km2 (197,690 mi2)
9. Great basin: 492,000 km2 (190,000 mi2)
10. Sistan basin: 370,000 km2 (140,000 mi2 )
11. Cuvelai River-Etosha Pan Basin: 166,649 km2 (64,344 mi2)
12. Mapimí-Salado basin: 260,000 km2 (100,000 mi2)
13. Lake Titicaca-Desaguadero River-Lake Poopó System: 144,590 km2 (55,830 mi2)
14. Lake Turkana: 130,860 km2 (50,530 mi2)
15. Mar Chiquita: 129,715 km2 (50,083 mi2)
16. Awash Basin: 116,000 km2 (45,000 mi2)

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