In general, groundwater is heated by geothermal heat below to become hot water. Deep hot water mostly contains gases, which are mainly carbon dioxide. When the temperature of hot water rises, if there is a dense and impermeable rock formation blocking the way, the pressure will become higher and higher, so that the hot water and vapor are in a high-pressure state, and they will rush up as soon as there is a crack.

As the hot water rises, the pressure gradually decreases as it gets closer to the surface. The density of the hot water is reduced by the gradual expansion of the gases contained in the pressure decrease, and these expanded vapors are more conducive to the rise of the hot water. Convection is generated by repeated cycles between the rising hot water and the cold water that is heated later due to the different densities (hydrostatic pressure difference).

In the case of low resistance of open fractures, hot water can be continuously gushed up and gushing out of the surface along the fractures. Eventually, it flows out of the ground and forms a hot spring.

Judging by the shape in front of us, the fountain in front of us should have been formed by the infiltration cycle of surface water. In other words, it is a groundwater system formed by rainwater falling to the surface and infiltrating downwards and penetrating deep into the earth's crust.

I suddenly had a feeling and said to everyone: "Generally speaking, the groundwater system that forms a fountain must meet certain conditions:

1. There must be hot water underground to store zài, that is, there is a heat source underground to store zài;

2. There must be a hydrostatic pressure difference to guide the upwelling of hot water, that is, there are cracks in the rock formation to allow the hot springs to gush out;

3. There must be deep and long cracks in the rock, and hot water can reach the ground.

All three are indispensable. As long as one of them is missing, no natural fountain will be formed.

In fact, there are many huge groundwater systems in China's major mountain and river veins. However, it was precisely because of the above three conditions that the natural fountain was not formed. However, because of many later factors, the gushing of underground water basins is caused. Like what. Earthquakes, manual excavations, etc. ”

When the old ghost heard me say this, he was also interested, and wanted to show his well-informed side. He hurriedly snatched me and said, "I know that according to the bathing method of hot springs, bathing is usually called 'mineral bath'.

Mineral baths are simple, comfortable and practical in the treatment of certain chronic diseases and health care. It has its own unique role. It is often superior to certain drug and device treatments.

Hot springs are a natural remedy in which most chemicals settle on the skin and change the pH of the skin. Therefore, it has the effect of absorption, precipitation and removal. Its chemicals stimulate the autonomic, endocrine and immune systems.

Although hot springs are good for your health, some say they can treat skin diseases, heart disease, and more. It can also relieve fatigue and relieve mental stress.

If nothing else, in Japan alone, many places with hot springs have set up sanatorium-type hospitals. Borrow hot springs to treat skin diseases. ”

"But there's a caveat to this, right?" I said, "Hot springs are not a cure for all diseases, they have to be used properly." Also be careful about its dangers, for example, if you are full of food or drink, do not enter the water immediately. Otherwise, it will only be counterproductive. Counterproductive. ”

"Nonsense! Do you still need to say this? The old ghost was dismissive of my statement and said, "Isn't that the same as the entertainment venue, the theme park, the bathing center?" Man is in a state of fullness. It's easy to be sick to your stomach, just like many roller coasters, bungee jumps and other extreme sports also have such regulations! ”

"Yes!" I have to agree with the old ghost.

The old ghost then gushed out, "There are different types of hot springs depending on the quality of the springs:

For example, 'volcanic hot springs': when rainwater falls to the surface of the earth, penetrates down into the earth's crust, and rises through cracks to the surface after being subjected to high heat and pressure, the temperature is still higher than the human body temperature. This is the so-called 'hot spring'.

There are many forms of gushing out, some silently and slowly, some rumbling and spurting, and some are hot water gushing out with mud and natural gas.

There are also 'non-volcanic hot springs', including Fukashiroi hot springs, metamorphic rock hot springs, and sedimentary rock hot springs. That is, through guò physical exploration, geological analysis. Calculate the depth of the aquifer due to geothermal energy. As a result, we will drill in geothermal areas where there is a possibility of hot spring development, and extract hot spring water from deep fault zones.

Hot springs can be divided into four categories according to the different temperatures: boiling hot springs with water temperature of 100C, high temperature hot springs above 75C, medium temperature hot springs between 40C and 75C, and low temperature hot springs below 40C. ”

The old ghost cleared his throat at this point, and seemed to be a little dry in his mouth. We tried to get him to stop, but he jumped to the edge of the spring, picked up the hot spring water in his hand, and drank it in a big gulp!

His sudden behavior really stunned us. Putting aside the unhygienic nature of Wei, it is difficult to say whether there will be side effects if you drink it. So, I dragged the old ghost up and said, "Are you crazy?" Do you know if you can drink it or not, and just drink it? ”

Unexpectedly, the old ghost smiled and said to me nonchalantly: "It's okay, I can't live or die, I can't live or die!" My life, hard! How easy is it to die? ”

As soon as I heard what the old ghost said, I was immediately furious. Scolded: "What nonsense are you talking about? If you are bent on dying, you must die even if you cannot die. Can't you live well? I'm going to get you out there, and I'm going to get you back safely!" You are the only seedling of the Shi family, if you have three long and two short, your family will not have to tear down our house? ”

The old ghost saw that I was really angry, so he waved his hand again and again and said, "Boss, boss, calm down!" I know you're doing it for my good, so I'm just kidding you, aren't I? I'm not the master with a bad brain, I didn't think about it, you were angry. ”

Hearing the old ghost's words, I suppressed my anger a little and asked him, "What do you mean?" Say! ”

The old ghost said, "I just saw something to drink by the water, so I dared to drink like this." You think I've got a bad brain? Just drank it without asking? ”

"Something? What is it? Where did this stuff come from? I asked.

"The light was so dim that I couldn't see clearly." The old ghost wiped the spring water from his mouth and said, "I was about to take a closer look, but the little fellow was very vigilant and ran away at once." ”

When the big man heard this, he immediately asked vigilantly: "There are few people here, and there is no food, how can there be any small animals?" Are you blind? ”

Seeing that everyone didn't believe what he said, the old ghost immediately patted his chest and promised: "I promise Chairman Mao that what I said is true!" Moreover, there is absolutely no dazzle! If you really don't believe me, look at me, am I not good? (To be continued......)