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The global water cycles (Inputs and outputs (inputs of water to the…
The global water cycles
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Inputs and outputs
US geological survey estimates the global water cycle budget circulates around 505,000 km2 of water a year
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Ice sheets, glaciers and snowfields release water by ablation
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A large part of water falling as precipitation on land reaches rivers only after infiltrating and flowing through the soil
After infiltrating the soil, water under gravity may percolate into permeable rock or aquifers
This groundwater eventually reaches the surface the surface as springs or seepages and contributes to run-off