Qiqi wind tunnel

Qiqi wind tunnel

Qifeng wind tunnel is located 5 kilometers northwest of Shilin, at the junction of Beida village and shuitangpu village. It is a stone forest on the east side of Ma'an. The shapes of the stone peaks are different and have their own characteristics. Some are like the torches ignited during Sani Torch Festival; some are like the snow lotus; some are like the mushrooms. There is also a huge rock beside the wind tunnel, which is like a guardian of the wind tunnel. In the cropland under the stone peak, there is a small hole with a diameter of 1 meter. This small hole is a strange wind tunnel. Strange wind tunnel is one of the most peculiar caves in Lunan Stone Forest scenic area. It is not famous for the grotesque of stalactite, but because it can breathe like a human, so it is also called "breathing hole".

phenomenon

Every year in the rainy season, the earth absorbs a lot of rain, and when the dry river starts to murmur again, the wind tunnel starts to blow and absorb the wind, giving out the gasps of "Hoo", "frighten", "Hoo" and "frighten", like a tired old cow panting. If someone intentionally seals the hole with mud, it will blow the mud away effortlessly and breathe freely.

When the wind blows in the strange wind tunnel, the quiet earth suddenly becomes dusty, whistling, accompanied by the sound of running water. It seems that a huge flood may emerge in the cave at any time. When you look at it, you can't see a drop of water. When the wind is strong, people feel like they are in a strong wind and a rainstorm is coming. Some people pull some dry grass and sticks and put them in front of the cave to light them. The wind blowing out of the cave makes the flames and smoke soar to the sky, two or three meters high. After two minutes, the fire gradually weakens. After ten minutes of temporary stop, the flames and smoke suddenly swallow into the cave It's like a clever magician playing the game of seven orifices spitting fire.

Another wonder

Siphon spring is located at the lowest point of Qifeng scenic area. It is another natural wonder. The clear and transparent underground river water flows out of the hole and into a deep sinkhole. With the flow of the river, the water level in the cave gradually rises. When it rises to one to two meters, the water level suddenly drops, accompanied by a thundering sound of drainage. After three or four minutes, everything returns to its original state, and then the water level rises again Gradually rising Repeat it in about 20 or 30 minutes.

According to investigation, the peculiar geology of Qifeng tunnel is composed of intermittent jet tunnel, siphon spring and underground river. The intermittent jet wind tunnel is at the edge of the stone forest in the middle of the hillside. At the foot of the mountain, there is a stream more than 10 meters long. After the stream is exposed from the underground river, it flows for more than 10 meters into the underground river, and then it flows for several meters into the siphon spring. Siphon spring is formed by the dissolution of uneven limestone. The external opening is narrow, but there is a large space inside, which is gourd shaped. The siphon spring is connected with the intermittent jet wind tunnel. There is a hole in the ground. Therefore, when the water flows to the mouth of the gourd and is blocked, the pressure generated by the increase of the water flow forces the water to squeeze into the gourd quickly. The falling water extrudes the air in the gourd belly from the intermittent jet hole from the underground cavity, resulting in the phenomenon of air spraying. After the water flows away, the mouth of the gourd is blocked again, and the air pressure in the gourd belly is the same as that outside The physical action makes the air backfill from the blast hole, forming the phenomenon of air absorption.

Interaction

Strange wind tunnel, siphon spring and underground river interact. If there is no running water in the stream at the foot of the mountain, strange wind tunnel will not breathe. On the contrary, if the stream flow is too large and the river is flooded, strange wind tunnel will not breathe. Therefore, the phenomenon of breathing does not occur in all seasons, usually from June to October.

Beautiful legend

There is also a beautiful legend about the strange wind tunnel in Shilin. A long time ago, there was a Sani youth named Guoji in Lunan village. He fed his blind mother by feeding the Tusi cattle. One day, Guoji went to a cave to put animals, and heard someone saying in the distance: "diligent and kind people! Come to me! I will give you happiness. " Guoji went to the place where he was talking and found a cave in front of him. He bravely climbed into the cave. First, it was dark. After climbing for a while, he came to a bright big cave. The cave was full of gold and silver, food and medicinal materials. Guoji doesn't love gold and silver. He just takes a little herbal medicine and grain and climbs out of the cave. He distributes the grain to the poor villagers and uses herbal medicine to cure his mother's disease. The news that Guoji finds the treasure cave comes to the chieftain. The greedy chieftain takes the ferocious servant and forces Guoji to carry the gold and silver in the cave. Guoji was tired and thirsty because of his heavy cloth bag. After drinking the spring water in the cave, he felt bloated and gradually became a python. Thinking that he would never be able to support his mother again, he heard the Tusi yelling fiercely outside the cave. His heart of revenge sprang up. He climbed out of the cave and opened his mouth to swallow the Tusi. The mother didn't see her son come back. She found the cave and kept calling her son's name to the cave. Guoji was afraid that his appearance would frighten his mother, so he could only gasp in the hole. Over time, mother turned into a crooked hill with her head tilted to call her son, and Guoji could only answer her mother's call in the cave

phenomenon

It turns out that the area where Qifeng wind tunnel is located is a kind of limestone karst landform. About 100 meters to the east of Qifeng wind tunnel, there is a gully in which there is a sinkhole formed by dissolution of limestone. A clear spring flows into the well from the upstream and into the underground river from the crack at the bottom of the well. When the amount of spring water is abundant, the water in the well will gradually rise due to the limited drainage capacity of the fractures at the bottom of the well. Because there is a crack on the wall of the well, and it arches upward and then slowly falls into the underground river, the gap of Qifeng tunnel inclines downward and connects with the crack. Therefore, when the spring water in the well rises to a certain extent, that is, the water flows into the fracture of the shaft wall, and the water level reaches the highest arch point of the fracture, the siphon phenomenon occurs, that is, the water flows along the fracture channel of the shaft wall to the underground river. At the same time, the rapid flow of water made a rumbling sound; the air accumulated in the curve was pushed by the water and ejected from the strange wind tunnel. When the water in the well drops sharply to the fracture of the well wall due to a large amount of pumping, the air will re-enter the bend and produce return air. In a word, the phenomenon of Qiqi wind tunnel is a siphon phenomenon.

Address: Northwest of Shilin Yi Autonomous County, Yunnan Province

Longitude: 103.32911149651

Latitude: 24.817398323883

Tour time: half a day

Chinese PinYin : Qi Feng Dong