Emergency Water Source – Evaporating with a Solar Still: Survival Tip ► All 4 Adventure TV
69 Comments


While we wait, here’s a little survival trick.
Yeah the one thing about bush survival, especially if you’re stuck in the bush or bogged, places
like the salt pans here, they could kill you in a heartbeat. And if you don’t have fresh
water, that’s the one thing that you’re not gonna last long without. Food, if you’re a
bit of a big guy, you could go for a month easy. But water, in the hot sun, you’d probably
last about four days, and by the third day your brain’s probably not workin’ real well
either. By then, it’s over. So, I’ve learned over the years, some few techniques to get
fresh water out of a baron salt heat-encrusted wasteland, really. So what it’s called is
basically, it’s a solar still or an evaporator. Because what I want to do is, I want to try
and evaporate, using the sun’s heat, I want to try and evaporate the moisture, the fresh
water out of the surrounding vegetation and out of the salt water. Now the biggest thing
you’ve gotta think of is you really want to be makin’ this first thing in the morning,
because that’s when it’s cool and you’re not going to expel much sweat from your body.
Because the more you expel, the more water you’ve gotta create from your still. So just
remember that one. So now that I’ve got a good hole, a good even hole. She’s about a
foot and a half deep, and probably about three foot in diameter. So now, I’m gonna get some
vegetation in there. Now I’ve chosen this vegetation because one, the greenness of the
leaves, and two, the broadness of these leaves. If you look at that leaf, that means that
that leaf has a lot of moisture or this tree carries a lot of moisture, because it requires
a lot of moisture for that leaf to survive on that tree. So we get as much of the vegetation
in there as we can. Now what I’ve got here is I’ve got a bucket of sea water. Now that’s
a truck-load of moisture that’s gonna help as well. So I’m gonna pour a bucket of seawater
in there as well. Now this cup is gonna be my collection point and it’s gonna sit down
in the middle. Alright, now I need some plastic, so I’ve got a massive sheet of plastic here.
I only want one layer of it. I want a low point in the middle, and it’s that low point
that’s going to track all that moisture down into the center and collect in my cup. Alright,
so that now, we’re gonna sit that, we’ll leave that over night, and there’s a lot of dew
around in the mornings as well, so that’s gonna help with the cause. And that hopefully
will have a lot of fresh water in it, in the morning… and there’s already condensation
happening on my plastic. So come the morning, we should have a lot of water in that cup,
and that’s what will keep us alive if we need water.
Look at that, there’s a lot of water there. So you can see the condensation, and all it
does is trickle down the center and into my cup. I’ve even caught myself a lizard. Here
little fella, you’re alright mate. That’s it. You fire up. Alright, mate you’re good
to go. You go over there. There you go. So what I’ll do is I’ll try and get as much of
that condensation down into the center before I take it off. Now if you’re gonna continually
use this still, the trick is to have like a piece of clear tube about six mL in diameter,
and you’d have it stickin’ out here. And the other end would sit in the cup [sips] you’d
suck it through the tube. And you don’t have to upset any of this. But for this exercise
I’m gonna show you how much fresh, drinkable water is in that cup. And remember, I poured
salt water into there and leaves, and that’s it. And there you go. I reckon that’s about
probably 250mLs of pure, fresh water. Now that, that would help you out in a situation
if you needed moisture, because remember dehydration will kill you in days. You can live without
food for ages, but dehydration? Nope, your organs will shut down, and it’s all over.

69 thoughts on “Emergency Water Source – Evaporating with a Solar Still: Survival Tip ► All 4 Adventure TV

  1. I could be wrong, but wouldn't it have been better to place the whole bucket of salt water inside the still, off to one side? By tipping it in, a lot of the water would have just soaked away.

  2. I would recommend one layer of plastic at the bottom to maximize all the water besides wasting the water letting it sink to the ground. 

  3. I think this is the first time I have actually commented lads, but I absolutely love your videos. Please keep them coming.
    Andrew

  4. there are lots of info here that is quiet not correct, the sea water should be in a layer of plastic so no sipping in the ground to happen, also the collection cup is so small,

  5. So I am going to carry a bucket of sea water along with me in the bush just in case I need to make some emergency water????????????????

  6. Helpful, but only thing is Im not going to have a giant bucket or salt water. Going on a survival trip in a month in the Desert in Arizona and only allowed one bottle of water, a medium piece of rope, a small hard candy.

  7. Lot's of stupid comments on here. This is for coastal areas and salt pans, of course you don't carry a bucket of salt water with you into the outback!

  8. Would it still work without the salt water?
    Would it still work if you replaced the plastic with a thin piece of cloth or leaves?
    (Perhaps this could be another idea for a video and/or experiment?)

  9. oi m8 i swaer on mi mum's grave that this really works m8. Saw this method like 15 years ago m8 and its surprisingly easy to do m8. Im subscribing to this channel m8

  10. Wow! so much effort for a small cup of water!. Nevertheless, it's awesome trick!. You should build a prototype and carry it around. Or even better… why carry a bucket of sea water when you can carry a bucket of mineral water. And what if there's absolutely no water at all?

  11. WOW, at first sight the lizard at 3:44 looked like it was transparent but when I went back I realized it's just great camo!!

  12. That took 24 hrs to get. Humans need almost 2L of water per day.
    250 ml gives you an eighth what you need. Sitting in the shade and not doing much will decrease how much you need, but if you're going to use a still like that, you should really set up more than one.

  13. If you have that much plastic and access to sea water, I would suggest trying to attach the plastic to a rigid frame, then place the framed plastic over the hole, and gently pour seawater onto the top of the plastic. It will pool up into the center and if the plastic is tight enough, the pooled up water will create a parabola shape which makes for a POWERFUL "lens". If you can't tell where I'm going with this.. the lens will intensify the sunlight and create an extremely hot area at it's focal point. This intense focus of energy can then be used to rapidly boil that seawater. The steam it creates can be condensed and collected, and with essentially the same materials you've just created a distillation/desalination "factory", and your "couple hundred mL" per day, just turned into several litres per hour! 🙂 a side note: finding out just how far away you need to be from the bottom of the lens to find the convergence point (where the light is hot enough to boil water) can be difficult.. I suggest finding a tree or two that you can use as a jig to hold your frame/lens up high enough so you can find the convergence point by digging away ground, increasing the distance until you find the spot. You'll know you've found it because it'll be the incredibly bright "pin spot" that will burn your hand or ignite a piece of wood in seconds. Which brings me to the second use… Creating fire! Your solar powered death Ray can boil water just below the convergence point, and if you hold a tree branch wrapped with Birch bark and dry grass up to the intense focal point, it will create fire in seconds, OR, alternatively, you could also cook meat directly under the beam without having to build a fire or consume fuel or firewood in the process. This is useful when dry wood is not available, or you're trapped in a region where building a fire is difficult due to snow covered vegetation. This method could also be theoretically used to heat up large quantities of water which can be used as a source of heat also. A deep enough hole, dug under a shelter could allow you to use convection to hear your entire shelter while you sleep. The possibilities are endless when you harness the power of the sun.

  14. Nice video. It would be helpful to line the bottom of your hole with plastic before you add the plants and seawater/urine. It doesn't have to be clear plastic at the bottom of your still but clear is needed at the top.

  15. So let's create a solar still . . . but we're going to cheat by pouring a bucket of water into the hole, instead of putting that in a completely dry hole surrounded by the plants.

  16. Countries that don't get a lot of rain that are near the ocean could utilize this principle with canals of seawater.

  17. How does this scale? If I multiplied it by 15 that would make roughly a gallon a day. A 40 ft diameter hole seems large. What size would be wanted to make 3800 ml per day?

  18. how great, get a cup of water with all that work, probably sweated out more making it This is a myth, true it works but never good enough to be worth while.

  19. Thanks for sharing this example of using seawater. Great idea for islands surrounded by ocean with little to no fresh water, money, technology and resources.

  20. Why did you pour salt water in with the foliage? Is it necessary? What if your no where near a source of salt water….cool vid though man…

  21. so by making bunches of these you could easily gather gallons.honestly you dont need to put in near this much work since depth wont get more water but width will so make shallow wide holes.

  22. A couple of dozen of those should keep one person alive in hot weather. You only need a litre of water every couple of hours. Just remember to carry a decent shovel, a case of drinking cups, a couple of coils of flexible tubing and a big roll of plastic sheeting with the rest of your kit if you're planning on trekking……

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