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Backpacker Magazine – September 2012
Survival Lab: Emergency Water
Without a drink, a hiker can die in as little as a day. We tested three techniques for conjuring H20 out of thin air. Plus: 5 easy ways to stay hydrated in hot climates.
Pee Bottle (Andrew Bydlon)
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Tags:
- Survival |
Transpiration Bag
RESULTS This set-it-and-forget-it method can supplement your survival needs, but don’t count on it as your sole supply–unless you have two dozen plastic bags. Our test produced only a few teaspoons of water in four hours.
DO IT Place a smooth rock in the bottom corner of a plastic bag (the clearer and larger, the better). Pull the bag over a leafy branch. Tie it so air can’t escape. Wait a few hours, until water collects in the bag’s weighted corner. Untie the bag and pour the water into a container to drink. Works best with succulents and bright green, broad-leafed plants.
TIP Because heat will cause the plant’s pores to close, you’ll get the best results in the morning and evening.
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READERS COMMENTS
I have witnessed transpiration bag method work very well. It seems a black plastic (garbage) bag draws more dew in the sunlight quicker than the clear plastic bag. Consider one caution while choosing different tree/bushes to bag. You might want to avoid black cherry (Prunus serotina) as it off-gasses hydrogen cyanide in levels that may be detrimental to humans. I do not know if there is sufficient data in this area presently. reference: TOXICOLOGICAL PROFILE FOR CYANIDE, U.S. DEPARTMENT OF HEALTH AND HUMAN SERVICES, July 2006
Lijiang is located in the upper reaches of the Jinsha River, has a long history, beautiful scenery, majestic natural environment, the descendants of the ancient Qiang, Naxi hometown.
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Old Town of Lijiang 2,400 meters above sea level, is the center of the city of Lijiang Naxi Autonomous County, is one of the historical and cultural city, is a national key scenic spots.
     Here is located in Yunnan, Sichuan and Tibetan roads, ancient times, frequent business travel activities, prompting locals flourishing population, and soon became famous bazaar and town. Generally believed Lijiang city began in the early Song Dynasty.,i hope you will like it!
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