Hydrological System

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97% of the worlds water is in the ocean2% held in ice1% is the remaining fresh water we have

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The hydrological cycle begins with the evaporation of water from the surface of the ocean

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As the moist air is lifted, it cools and condenses to form clouds

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Moisture is transported around the world by clouds

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Water falls back to the surface as precipitationThis could be rain, sleet or snow

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Some water may evaporate when it returns to the surfaceOr the water penetrates the surface and becomes groundwater

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Ground water seeps its way in to the oceans, rivers and streams

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Or is released back into the atmosphere by transpiration

The balance of water that remains on earths surface is run off which empties into lakes, rivers and streams

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