2. The waterproof sealed bag of mobile phone is also necessary. Prevent the phone from falling into the water.
3. Before soaking in hot springs, take off your metal ornaments and makeup.
4. Also bring a bottle of water. You will sweat in the process of soaking in hot springs. You need to drink water in time to replenish water.
Extended data:
The formation of hot springs can generally be divided into two types:
One is formed by magmatism in the crust, or accompanied by volcanic eruption. In the dead volcanic terrain where volcanic activity has occurred, the crustal plate movement makes the surface uplift, and there is still uncooled magma underground, which will continuously release a lot of heat energy. Because of the heat concentration of this kind of heat source, as long as there are pores in the nearby water-bearing rocks, they will not only be heated into high-temperature hot water, but also boil into steam, mostly sulfate springs.
The second is formed by the infiltration and circulation of surface water. That is to say, when the rain falls to the surface and penetrates downward, the aquifer deep in the earth's crust forms groundwater (sandstone, conglomerate, volcanic rock, these good aquifers). Groundwater is heated by geothermal energy below to become hot water, and deep hot water mostly contains gas, mainly carbon dioxide. When the temperature of hot water rises, if there is a dense impermeable rock above it to block the way, the pressure will be higher and higher, so that hot water and steam are in a high pressure state, and as long as there are cracks, they will rush up.
After the hot water rises, the closer it is to the surface, the pressure will gradually decrease. As the pressure gradually decreases, the gas contained in it will gradually expand, reducing the density of hot water, which is more conducive to the rise of hot water. The rising hot water circulates repeatedly with the pressure (hydrostatic pressure difference) generated by the density difference of the cold water that sinks and heats later, resulting in convection. When the resistance of the open fracture is small, hot water rises along the fracture and gushes out of the surface, so that hot water can rise endlessly and finally flow out of the surface to form hot springs.
With the topography of high mountains and deep valleys, the surface water at the bottom of the valley may be higher than that of high mountains, and the groundwater level is in the middle and lower levels. Therefore, the bottom of the deep valley may be the place with the largest hydrostatic pressure difference, and the possibility of hot water rising from the bottom is the greatest. Most hot springs appear on the river bed of the valley.