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| - Table showing how long it takes for available water resources to renew themselves once they have been used. - |
| Water of Hydrosphere | Period of renewal |
| World Ocean | 2500 years |
| Ground water | 1400 years |
| Polar ice | 9700 years |
| Mountain glaciers | 1600 years |
| Ground ice of the permafrost zone | 10000 years |
| Lakes | 17 years |
| Bogs | 5 years |
| Soil moisture | 1 years |
| Channel network | 16 days |
| Atmospheric moisture | 8 days |
| Biological water | several hours |
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