Hydrological System

Folie 1

• 
• 97% of the worlds water is in the ocean
• 2% held in ice
• 1% is the remaining fresh water we have

Folie 2

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

Folie 3

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

Folie 4

• 
• Moisture is transported around the world by clouds

Folie 5

• 
• Water falls back to the surface as precipitation
• This could be rain, sleet or snow

Folie 6

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

Folie 7

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

Folie 8

• 
• Or is released back into the atmosphere by transpiration

Folie 9

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