Difference between revisions of "Fresh water"
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[http://www.elementfour.com/ The Watermill] | [http://www.elementfour.com/ The Watermill] | ||
| − | == | + | == Fresh water lens == |
| − | + | [[Image:Ghyben-Herzberg.gif|frame|Ghyben-Herzberg lens]] | |
Human can survive about anywhere provided there is enough fresh water. Moreover, fresh water is lighter than sea water. | Human can survive about anywhere provided there is enough fresh water. Moreover, fresh water is lighter than sea water. | ||
| − | So the best place to live is on top of a mass of porous materiel saturated of fresh water (like a kitchen sponge). | + | So the best place to live is on top of a mass of porous materiel saturated of fresh water (like a kitchen sponge). In natural island it is known as the [http://www.emwis-mt.org/documentation/Context/Physical%20factors_files/Ghyben-Herzberg.htm Ghyben-Herzberg lens]. |
The water may be collected from rain. If the island is large and deep enough (40 times deeper that its height), it will be naturally protected against salt water intrusion. Otherwise, some watertight barrier is needed. | The water may be collected from rain. If the island is large and deep enough (40 times deeper that its height), it will be naturally protected against salt water intrusion. Otherwise, some watertight barrier is needed. | ||
Revision as of 11:35, 14 October 2008
- Water, water, everywhere,
- And all the boards did shrink;
- Water, water, everywhere,
- Nor any drop to drink.
Contents
Desalinization
Reverse Osmosis
In the boating world, reverse osmosis machines are also called "watermakers".
Rainwater Harvesting
Rain is responsible for depositing most of the fresh water on the planet, most of it over the ocean (see wikipedia).
If you ever lived in a tropical country, you quickly learn to espect a daily rain fall between 5 and 6 o'clock of about half an hour. And collecting rain fall is the easy. With a permeable soil, you even have nothing to do.
Post on collecting rain.
Dehumidification
Fresh water lens
Human can survive about anywhere provided there is enough fresh water. Moreover, fresh water is lighter than sea water.
So the best place to live is on top of a mass of porous materiel saturated of fresh water (like a kitchen sponge). In natural island it is known as the Ghyben-Herzberg lens.
The water may be collected from rain. If the island is large and deep enough (40 times deeper that its height), it will be naturally protected against salt water intrusion. Otherwise, some watertight barrier is needed.
See more explanation at geography.about.com
Links
- Wikipedia article on desalination
- Wikipedia article on Reverse Osmosis
- Wikipedia article on Watermakers
- Wikipedia article on solar desalination
- Wikipedia article on Solar Still
- Wikipedia article on Rainwater Harvesting
- The Hurricane Tower "Fresh Water generation through simulation of natures hurricanes".
- Sea Solar Power
- Seawater Greenhouse
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