Availability of water on earth
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Of the Earth's total water, 97.5% is saltwater found in oceans. The remaining 2.5% is freshwater, with over 24 million cubic km locked up as ice or snow. An additional 10.7 million cubic km is stored underground or in soil. Freshwater lakes and marshes contain just 0.1 million cubic km, while rivers hold an even smaller 0.002 million cubic km. Most freshwater is frozen in oceans as icebergs and glaciers, and available freshwater supplies are unevenly distributed and may not match locations of human populations.
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Availability of water on earth
- 1. Availability of Water on Earth
- 2. How much do we have? Global Water About 70% of the earth is covered in water. The total amount of water in the world is approximately 1.4 billion km 3 , of which 97.5% is saltwater and 2.5% is fresh water. Of the 35 million km 3 of freshwater on earth, about 24.4 million km 3 are locked up in the form of glacial ice, permafrost, or permanent snow. Groundwater and soil moisture account for 10.7 million km 3 . Freshwater lakes and marshlands hold about 0.1 million km 3 . Rivers , the most visible form of fresh water account for 0.002 million km 3 or about less than 0.01% of all forms of fresh water.
- 3. Distribution of Earth’s Water
- 4. WHERE IN THE WORLD IS MOST OF THE WATER? IN THE OCEAN
- 5. WHERE IN THE WORLD IS MOST OF THE FRESHWATER? FLOATING FROZEN IN THE OCEAN AS ICEBERGS AND GLACIERS
- 6. HOW MUCH WATER IS AVAILABLE FRESHWATER (WATER WE CAN ACTUALLY GET TO)?
- 7. AVAILABLE WATER IS NOT EVENLY DISTRIBUTED AROUND THE PLANET AND NEITHER ARE THE PEOPLE.
- 8. SEEING INTO THE FUTURE: A GLOBAL PERSPECTIVE