Question

What is the percentage of ground water of the total water available on earth ?
1. 10%
2. 20%
3. 31.1%
4. about 0.7%

Answer 1

Correct Answer - Option 4 : about 0.7%

The correct answer is about 0.7%.

• Earth is called the "Blue Planet" because it looks blue from space due to the presence of water on its surface.
• Around 71% of the Earth's surface is covered with water.
• Almost all the water on the earth is contained in the seas and oceans, rivers, lakes, ice caps, as groundwater and in the atmosphere.
• While the other 29% consists of continents and islands.
• The amount of water that exists as groundwater would constitute just over 10.6 million km³, which works out to a little over 0.7%. 
• The water found below the water table is called groundwater.
  • The groundwater gets recharged by the infiltration process.
  • The rainwater can be used to recharge the groundwater.
  • Groundwater is the second largest available reservoir of freshwater. 
• The percentage of distribution of the water on Earth is:
  • Ocean water: 97.2%.
  • Glaciers and other ice: 2.15%.
  • Groundwater: 0.7%.
  • Freshwater lakes: 0.009%.