A suction bog is called a bog, and it only sucks in living objects. Bog is not formed in all bogs and, as a rule, on the basis of lakes by overgrowing with a green carpet of algae and moss.
A swamp can arise for two reasons: overgrowth of a reservoir or waterlogging of land. The swamp is characterized by excessive moisture, constant deposition of not completely decomposed organic matter, which is called peat. Not all bogs have the ability to suck objects, but those in which a bog has formed. A bog is formed, as a rule, on the site of a lake. Water lilies, lilies and reeds on the surface of the lake eventually grow into a dense carpet on the surface of the reservoir. Meanwhile, algae grow at the bottom of the lake. As it forms, a cloud of algae and moss rises from the bottom to the surface. Due to the lack of oxygen, rotting begins, organic waste is formed, which disperse in the water, forming a bog. Bog has an insidious property to suck in living objects, this is due to its physical properties. The bog belongs to the class of Bingham fluids, which are physically described by the Bingham-Shvedov equation. The main property of these liquids is that when they hit the surface of an object with a low weight, they behave like solids, i.e. the item will not submerge. And if the object is heavy enough, then it sinks. There are two types of immersion: undersubmersion and oversubmersion. The behavior of a body trapped in a liquid is subject to the ratio of the effects of gravity and the buoyancy force of Archimedes. The body will sink into the quagmire until the strength of Archimedes is equal to his weight. If the buoyant force is less than the weight, then the object will be undersubmerged, if it is greater, then - overdiving. And now about the insidiousness of the bog, which is expressed in the fact that only living objects (people, animals, birds) are overloaded. The reason is that such objects are constantly moving. It would seem that you can freeze and dive to stop, but unfortunately, this will only slow it down, because a living body always moves because it breathes. Inanimate objects remain motionless, therefore they do not completely submerge. Overdiving in a bog is called swamp suction. Why does body movement accelerate the dive? Because any movement is the application of a force that increases the force of pressure on the support due to the force of gravity and the weight of the object. In addition, abrupt movements cause the formation of low pressure areas under the body, which will lead to an increase in atmospheric pressure on a living object, further submerging it. Thus, the physical definition of the word "swamp suction" is as follows: bog, i.e. Bingham liquid, tries to transfer a living object that has fallen into it to a level below normal immersion, at which the Archimedes force is less than the body. The suction process is irreversible, i.e. the drowned body, even after the cessation of vital activity, no longer resurfaces.
