To survive in the wild, remember that drinking water must give priority to drinking its own drinking water, and if you want to drink water from the wild, you must be disinfected or heated. There are usually two ways to obtain drinking water, one is to dig up groundwater, and the other is to purify surface water.
First of all, rainwater can be collected and drunk, when it rains, you can collect a large amount of rainwater with plastic wrap, raincoats and water bags, plastic sheets, etc., and you can also collect rainwater from empty can boxes, cups, helmets and other containers.
Under extreme conditions, dew can be collected using water-bearing plants, cacti, etc., or by wrapping plant leaves in plastic bags. Sprinkle an appropriate amount of alum into the collected water and allow the water to settle for a period of time. So, a life straw should be equipped with you.
When there is no reliable drinking water and no testing equipment, the water quality can be roughly identified according to the color, taste, temperature and traces of the water. Pure water is colorless and transparent when the water layer is shallow, and light blue when it is dark. You can observe with a glass or white porcelain holding water, usually the clearer the water, the better the water quality, and the more turbid the water, the more impurities. Generally clean water is odorless, while contaminated water often has some odor.
