NOTE: We've guessed that
you're not using a client that supports colored tables and have tried
to compensate. Low graphics mode looks much better on clients that
do... we recommend switching to Netscape 3.0 or Microsoft Internet
[Image: Hydrologic Graphic (76K)]
Graphic by: Dan Bramer
Water is the source of all life on earth.
The distribution of water, however, is quite varied; many locations
have plenty of it while others have very little.
Water exists on earth as a solid (ice), liquid or gas (water vapor).
clouds, and rain, all of which contain water, are in a
frequent state of change (surface
cloud water precipitates, rainfall infiltrates
the ground, etc.). However,
the total amount of the earth's water
does not change.
The circulation and conservation
of earth's water is called the "hydrologic cycle".
The Hydrologic Cycle module has been organized
into the following sections:
Last Update: 07/21/97
The Earth's Water Budget
The distribution of water among the oceans, land and atmosphere.
The transformation of
water from a liquid into a gas, a process which humidifies the atmosphere.
The transformation of water from a gas into a liquid, and the processes that
lead to condensation.
The movement of water through the atmosphere.
The transfer of water from the atmosphere to land. Rain, snow,
hail, sleet, and freezing rain are discussed.
Water located below ground and how it
returns to the surface.
Transfer of water to the atmosphere by plants and vegetation.
Rivers, lakes, and streams transport water from land
to the oceans. Too much rainfall can cause excess runoff, or
Summary and Example
A brief encapsulation of the hydrologic cycle, plus an example of
the hydrologic cycle at work.
Those who contributed to the development
of this module.
The navigation menu (left) for this module is called
and the menu items are arranged in a recommended sequence, beginning with this
introduction. In addition, this entire web server is accessible in both
"graphics" and "text"-based modes, a feature controlled from the
blue "User Interface" menu (located beneath the black navigation menus).
More information about the user interface
options, the navigation system,
or WW2010 in general is accessible from
About This Server.