### Re: How many gallons of water are there in all of the oceans?

Date: Thu Aug 24 05:16:12 2000
Posted By: Dr Jim Mullaney, Secondary School Teacher, Chemistry / Biology, Mandurah Catholic College
Area of science: Earth Sciences
ID: 966485663.Es
Message:
```
Larry,
That is a very interesting question - you probably won't believe the
answer because it is so huge!!!!!!! This is information I got from the  US
Geological survey page, which can be found at -
http://wwwga.usgs.gov/edu/earthhowmuch.html

The total water supply of the world is 326 million cubic miles (a cubic
mile is an imaginary cube (a square box) measuring one mile on each side).
A cubic mile of water equals more than one trillion gallons.

One cubic mile = 1,000,000,000,000 gallons so the earth has -
326,000,000,000,000,000,000 gallons.

About 3,100 cubic miles of water, mostly in the form of water vapor, is
in the atmosphere at any one time. If it all fell as precipitation at
once, the Earth would be covered with only about 1 inch of water.

The 48 contiguous United States receives a total volume of about 4 cubic
miles of precipitation each day.

Each day, 280 cubic miles of water evaporate or transpire into the
atmosphere.

If all of the world's water was poured on the United States, it would
cover the land to a depth of 90 miles.

Of the freshwater on Earth, much more is stored in the ground than is
available in lakes and rivers. More than 2,000,000 cubic miles of fresh
water is stored in the Earth, most within one-half mile of the surface.
Contrast that with the 60,000 cubic miles of water stored as fresh water
in lakes, inland seas, and rivers. But, if you really want to find fresh
water, the most is stored in the 7,000,000 cubic miles of water found in
glaciers and icecaps, mainly in the polar regions and in Greenland.

Hope this helps ... and thanks for using the Mad Scientists :o)

DrJim

```

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