dangers of canyoning

Danger!
  
Canyoning can be dangerous. Escape out the side of the gorge is often impossible, and completion of the descent is the only possibility. Because of the remoteness and inaccessibility of many canyons, rescue can be impossible for several hours or several days.
1. High water flow / hydraulic

    Gorges with significant water flow may be hazardous and require special ropework techniques for a safe journey. Hydraulic, hidden, and a sieve (or sieve) occur in flowing canyons and can trap or pin and drown Canyoneer a.
2. Flash floods

    A potential danger of many canyoning trips is a flash flood. A canyon "flashes" when a large amount of precipitation falls in the drainage and the water level in the canyon rise quickly as the runoff rushes down the canyon. In the canyons that drain large areas, the rainfall could be many kilometers away from canyoners, completely unbeknown to them. A calm or even dry canyon can quickly become a violent torrent due to severe storms in the vicinity.
3. Hypothermia and hyperthermia

    temperature-related illnesses are also canyoning hazards. In the arid desert valley, heat exhaustion can occur if proper hydration levels are not maintained and adequate steps are not taken to avoid the intense rays of the sun. Hypothermia can be a serious hazard in the canyon that contains water, during any time of year. Wetsuits and drysuits can mitigate this danger to a large degree, but when people miscalculate the amount of water protection they need, dangerous and sometimes fatal situations may occur.
4. Hole keeper

    Some canyoneering, especially in sandstone slots, involves escaping from large hole. Also called a "keeper potholes," this feature, carved by water that falls below the current decline, circular pits that often contain water that is too deep to stand up and the walls are too smooth to easily climb out of. Canyoneers use some unique and creative devices to escape potholes, including hooks used for rock climbing attached to long poles and specialized weighted bag attached to the rope and throw on the lip of the hole.
5. very narrow slot

     Narrow slot canyons, especially those narrower than humans, present difficult obstacles for canyoners. At the time of canyoner one is forced to climb (using chimneying or off-width climbing techniques) for the altitude at which one can comfortably maneuver laterally with pressure on both walls of the canyon. It tends to be heavy and can require climbing high above the canyon floor, unprotected, for long periods of time. Failure to complete the required moves could lead to stuck in a canyon where rescue very difficult.Slot narrow valley sands tend to have abrasive walls which tore clothing and equipment, and can cause painful skin abrasion as canyoner move or slide along them.