1. Mapping the World’s Water
HeatherLin Rowan and Courtney Rector

2. A. Water on Earth
There is approximately 326 million trillion gallons of water on Earth
72% of Earth is covered in water
About 97% of all water is in the oceans
You are about 70% water

3. A. Water on Earth
69% of the freshwater is locked up in glaciers and icecaps
Most of the remaining freshwater is ground water
Only about 0.3% of freshwater is in rivers and lakes (surface water)

5. Water source
Percent of fresh water
Percent of total water
Oceans, Seas, & Bays --
96.5
Ice caps, Glaciers, & Permanent Snow
68.7
1.74
Groundwater
1.7
    Fresh
30.1
0.76
    Saline
0.94
Soil Moisture
0.05
0.001
Ground Ice & Permafrost
0.86
0.022
Lakes
0.013
0.26
0.007
0.006
Atmosphere
0.04
Swamp Water
0.03
0.0008
Rivers
0.0002
Biological Water
0.003
0.0001
Total -
100
One estimate of global water distribution:

6. B. Texas Water There are over 11,247 streams and rivers
The total length of all streams and rivers combined is 191,228 miles
Texas has 6,736 lakes
There is more than 350 miles of coast
The state has 10,196 reservoirs larger than 10 acres
There is more than 6.3 million acres of freshwater wetlands
There are also thousands of smaller reservoirs, private ponds, and stock tanks

7. The Earth’s Water Fresh Water GROUND WATER PACK ICE POTABLE WATER
SURFACE
WATER

8. C. Pack Ice and Permafrost
The majority of the earth’s freshwater is locked in
Polar ice caps
Snow
Pack ice
Permafrost

10. D. Surface water vs Groundwater
Surface water- uncommon but much more accessible , so most humans rely on lakes and rivers for their water needs
Groundwater- cleaner due to the filtering effects of soil.

11. E. Potable Water
Water clean enough for people to drink regularly without becoming ill
Due to geography and contamination with salt, human and animal waste, or other chemicals, water scarcity is one of the largest problems facing developing nations.
Gray water is water that is clean enough to be recycled for some uses, but not drinking.
UN Millenium Goal: Halve the number of people without access to clean water by 2015
International Decade of Water

13. TRUE OR FALSE? About 50% of the earth is covered in water.
Almost all of the earth’s water is found in the ocean.
Most fresh water is found underground.
Surface water is cleaner and more accessible than groundwater.
Almost half of the world’s population has no access to clean water and sanitation.