One method to obtain water in a survival situation is through condensation.
The equipment necessary are:
(1) A shovel
(2) A container to hold the water (a two quart stainless steel pot with handle works well)
(3) A small stone
(4) A plastic tarp six-foot by six-foot
You dig a hole approximately four feet by four feet by three and a half-foot deep.
Place the container you will use to collect the water in the middle.
Place the CLEAN plastic tarp over the hole. It is best to have an unopened plastic tarp in it's original package. Air it out on a clothesline for a while before use. Put a small stone in the middle.
Let the tarp settle into the hole so it is above, but not quite touching the water collection container. Ideally, the angle of the plastic should be about forty-five degrees.
Now use earth to seal around the top of the tarp, so no air can leak in on any side.
Water will not collect underneath the plastic and drip down to the holding container. A two quart stainless steel pot wioth a handle makes a good collection container.
Every 24 hours, lift one end of the tarp, reach down, and retrieve your water.
This apparatus will yield one liter of water "plus" per day.