Hi, interesting reading.
http://www.bladeforums.com/forums/showthread.php?t=327698
Be hydrated :wave:
http://www.bladeforums.com/forums/showthread.php?t=327698
Be hydrated :wave:
den said:Good link.
Checking the colour and strength of smell is the way I check my hydration levels but saying that I can remember times when I have been working hard in the desert I drank water at every possible opportunity and as much as I could (easily over 20 pts) and still only passed dark smelly urine a couple of times a day.
I did a 2 day water depravation exercise in the desert once. It was around the top end of the 40's and was given two pints for the two days. I have got to say it was one of my worse times of my life. We spent the hot days under a poncho. My stress levels went through the roof. Trying to only take one swig out of a water bottle when you were so thirsty was almost impossible. To hot and irritated to sleep. No let up from the constant barrage of flys landing on your eyes and mouth. You could have easily gone crazy. Nasty, nasty nasty.
Being it that situation for real with no way out must be the worse way to die.
Ive tried a solar still a few times in the desert and other places and as you said its not worth the effort. Maybe a mouthful or two for a lot of effort. Peeing around the sides helps a bit.bambodoggy said:Den...I know it was only an exercise but did you have a bash at collecting your own water.....licking it off the metal of your vehicle in the early morning for dew etc? I
Pict said:Well that's a first. I've never opened up a link before and found something I wrote! That has to be some sort of milestone in my life as a wilderness board poster.
Mac
given that it has saved lives in survival situations and from what I read and posted on this thread earlier:Under no circumstances should you drink seawater or urine
Reuter Report
August 14, 1990
"Four Sri Lankan commandos who drifted in a boat more than 1,000 miles to Thailand after they had been ambushed and given up for dead were given a rapturous welcome when they returned home. 'They managed to survive on the boat by catching turtles and drinking urine,' a military officer said."
Kyodo News Service, Tokyo
July 30, 1990
"A male cook was pulled out of the rubble of the Hyatt Hotel early Monday morning, 14 days after a powerful earthquake devastated the northern Philippines, officials said. Dry, with only minor bruises on his body, he told reporters he survived by drinking his own urine."
Humans can't drink salt water because the kidneys can only make urine that is less salty than salt water. Therefore, to get rid of all the excess salt taken in by drinking salt water, you have to urinate more water than you drank, so you die of dehydration
DAY 5:... "I update my hour tallies in my head: 96 hours of sleep deprivation, 90 hours that I've been trapped, 29 hours that I've been sipping my urine, and 25 hours with no fresh water. The exercise evokes no emotion, only matter-of-fact acknowledgment."
DAY SIX: "....sip after sip of acidic urine has eroded my gums and left my palate raw."
Forward osmosis (FO) is a relatively unexplored process that may be able to separate salt from water as effectively as RO, while being more energy efficient, environmentally friendly and economically viable. It operates by osmotic flow of water across a semi-permeable membrane from seawater to a solution of higher osmotic pressure known as the "draw" solution.