Discolored “chaoquan”

   In our common sense, only regions with a large amount of water on the earth will be affected by the gravitational influence of the moon and there will be obvious tidal phenomena. However, little is known, in fact, the tides are far more than oceans and rivers. In inland areas that seem to be the least likely to have a “half dime relationship” with the tides, the smallest body of water on the earth, spring water, actually Tide phenomenon will occur!
   This is a rare, Chaoquan that can write beautiful rhythms between fluctuations. As the name implies, the tide spring is spring water that fluctuates. Is the spring’s fluctuation caused by the gravitational pull like the sea? If not, why?
   The famous tide springs that have been discovered so far include the Guiyang tide spring in Hunan, the Chaoquan group in Fengnan Town, Banan, Chongqing, and the Chaoquan in Weiyuan Town, Changshun County, Guizhou. Let’s go through them one by one!
   Guiyang will change the tide of Hunan Springs
   Hunan Guiyang spring tide area up to 100 square meters, a full 9 meters deep. Guiyang Chaoquan has high tide and low tide every day, with an amplitude of about 10-20 cm; but a tide occurs every 5 years, and the high tide amplitude can reach 9 meters, and the high tide will last for about a week; and the ebb tide is much shorter, about 3 -4 hours, and there will be a huge rumbling sound in the spring pond at low tide.
   The above phenomena are the common characteristics possessed by Chaoquan. It is not surprising. The most unique feature of Guiyang Chaoquan is that it will actually change color!
   The local residents can predict the weather change according to the color of the tide spring. When the spring water is abnormally green, it will be known that heavy rain will come. This method of watching the weather and measuring the spring has been verified many times locally and is considered very reliable by the locals.
   What is the reason for the formation of Chaoquan? Why does Guiyang Chaoquan “discolor”?
   Why does Guiyang Chaoquan rise and fall?
   Senior engineer Lan Xiaoming followed the CCTV shooting team to conduct a 7-day inspection of the Guiyang Chaoquan and its surrounding areas in 2015, focusing on the surrounding terrain, reservoirs, sinkholes, karst caves, underground rivers and local areas. The villagers made a detailed investigation and interview. Lan Xiaoming found that the Guiyang Chaoquan is surrounded by mountains on all sides, and the mountain rocks are mainly limestone, and the Chaoquan is just in a limestone sinkhole.
   The sinkhole is often funnel-shaped, and it is a vertical passage from the surface of the limestone area to the underground underground river or karst cave system.
   Since Chaoquan will rise and fall, there must be water inlets and outlets. Lan Xiaoming and his team found that the inlet and outlet of the Guiyang Chaoquan Luoshuidong are underground underground rivers, but their directions and locations are different. It is speculated that the water inlet of the Chaoquan is an underground underground river that dissolves along the rock layer or along the fracture surface; the water outlet is another underground underground river formed by the fracture surface perpendicular to the rock layer, but the outlet is not in The bottom of the sinkhole is at the waist of the sinkhole, which makes the tide spring reach a depth of a few meters when the tide falls to its lowest point.
   The water outlet is likely to be one or more narrow, vertical gaps. These gaps are uneven, and are easily blocked by debris such as sand, stones, leaves, weeds and plastic bags, cloth strips. Lan Xiaoming pointed out that the Chaoshui’s sinkhole is at a low point nearby, and the water of the dark river can easily collect here. He guessed that the water flow in the underground dark river at the water inlet was large and small, or intermittently replenished the tide spring; and the water outlet was a gap with a small water output. A large water input would cause the water level of the tide spring to rise. whereabouts. This is why Guiyang Chaoquan experiences small fluctuations 2-3 times a day.
   So what happened to Guiyang Chaoquan’s big ups and downs and bangs every five years?
   It turned out that Guiyang Chaoquan went up and down a few times a day, and over time, the water outlet would gradually be blocked by a blockage and almost closed, which would cause the water level in the pond to rise a few meters within a week. In the end, the debris blocking the water outlet will not be able to withstand the water pressure and will be completely washed away. The cracks in the water outlet will also be dredged, washed away and widened, causing the water to flow out. -Draining within 4 hours. This drainage speed, like a flood, is bound to be accompanied by a huge roar.
   This explains why the five-year tide of Guiyang Chaoquan rose slowly, but fell fast, accompanied by a booming sound.
   How can Guiyang Chaoquan “change color” to measure the weather?
   Why does Guiyang spring water change color? And can it be related to the weather?
   Lan Xiaoming believes that this is likely to be due to fish and shrimp in the water. Lan Xiaoming speculated that Guiyang Chaoquan’s water area is relatively large, so there are many small fishes and shrimps living in the water, these organisms are more sensitive to temperature and pressure. In general, when the weather is about to change, there will always be some meteorological parameters that may not be felt by humans, but fish and shrimp are very sensitive to this. Just like on the eve of a heavy rain, the swallows fly low and the field snails emit water, the fish and shrimp in the tide spring will also show strangeness or “agitation”, agitating the sediment, fallen leaves and other things at the bottom of the tide spring, and finally the color of the spring looks like it happened Changed.
   The local residents have accumulated a wealth of experience, and by observing this phenomenon, they can accurately judge the weather.
   Causes “tides” of terrestrial existence of a variety of claims
   mentioned earlier, China’s inland areas famous spring tide Guiyang can be more than one, people in Chongqing, Guizhou also discovered the wonders of nature!
   As early as 2003, the People’s Daily reported the Chaoquan group located in Fengsheng Town, Banan District, Chongqing City. According to Chongqing geological researcher Zhu Shunzhi, tide springs are rare in the country, and a spectacular tide spring group such as Fengsheng Town, where four tide spring caves appear continuously within 800 meters, is the first time in China.
   Every two hours or so, there will be thunderous sounds from the underground of Chaoquan Cave, and then the spring water will naturally flow out of the cave, only flowing but not spraying. Every day, such fluctuations occur as many as 12 times, and the rainy season is more frequent.
   The Chaoquan in Guizhou is located in Weiyuan Town, Changshun County, Qiannan Buyi and Miao Autonomous Prefecture. However, there are few reports about this Chaoquan. Only one publicly published paper describes the spring as follows: the spring flows from the foothills and rock gap There are three wonders of fluctuations in Japan.
   Although the tide springs appearing in all places have certain common points, as the saying goes, “one side of water and soil support one person” is also the same for natural landscapes. Different regions have different geological environments, so the same type of natural phenomena formed also have Different causes.
   Chongqing geological researcher Zhu Shunzhi used the phenomenon of “siphon” to explain the cause of the Chongqing Chaoquan Group. He believes that the underground spring channels of the Chaoquan Group should be in a vacuum state. These channels are directly inserted into a part of the underground special-shaped reservoir. When the water in the reservoir exceeds a certain level, the channel sucks water out quickly like a straw. At the same time, it also descended rapidly, until the “suction pipe” channel can no longer suck out groundwater, and then stopped; when the accumulated water again accumulated to a certain amount, it was sucked out again by the channel, thereby forming a tide spring.
   Experts such as Tan Huibin from Nanchang University proposed hypotheses such as squeezing model and laundry pool model on the causes of Chaoquan.
   The squeeze model hypothesis is similar to Lan Xiaoming’s point of view. This model assumes that the water in the tidal spring pond can be replenished by a steady stream of water, and the bottom of the pond contains a certain amount of sediment, which can block the micropores under the sediment. These micropores communicate with karst caves and dark rivers. When the water source replenishes water, the water level rises, and the water pressure increases to a certain critical value, the micropores will be squeezed. After the pores are opened, water flows into the dark river inside the cave, which causes the water surface to drop, the water pressure decreases, the water speed gradually decreases, and the pores are blocked again by silt and closed, thereby forming the ebb and flow.
   In the hypothesis of the laundry pool model, Chaoquan is like a laundry pool. Limestone and sand are compared to plastic bags in the laundry pool model. When the water level in the pool is low, the water outlet at the bottom of the pool will be blocked by plastic bags due to the effect of gravity; as the water level gradually rises, the plastic bag at the bottom of the pool that blocks the water outlet will also float under the buoyancy to make the water outlet Unblocked, the water in the pool can flow out, forming the phenomenon of ebb tide, until the water level is low enough that the plastic bag can block the water outlet under the action of gravity, preparing for the next high tide. In this way, the tide rises and falls and repeats itself.
   Lan Xiaoming believes that as Chaoquan is a rare natural wonder, so many of its mysteries need more geological researchers to conduct field investigations and discover more unknowns.