Water storage

 Amount
10≥ km≥

 Surface
equivalent
m

 Flux*

10≥ km≥

 Mean
residence
time

 Total

 1460 x 10≥

 2862

 E = 520

 2800 years

 Oceans

  1370 x 10≥

 2650

 E = 449

 3100 years

 Inactive ground water

  56 x 10≥

 110

 

 

 Frozen water

  20 x 10≥

 57

 R = 1.8

 16 000 years

 Active groundwater

 4 x 10≥

 8

 R = 13

 300 years

 Lakes

 230

 0.45

 E = 3

 76 years

 Soil water

 65

 0.13

 E + R = 85

 280 days

 Atmosphere

 14

 0.03

 P = 520

 9 days

 Rivers

 1.2

 0.002

 R = 36

 12 days

 Biological water

 0.7

 0.001

 

 7 days

 * R  = runoff, E = evaporation, P = precipitation

Table 1. Water balance of the Earth's hydrosphere

Water in the Universe
Water in the Universe

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