What's the mystery of Qingyu Spring Well?

In China's Sichuan, Guangxi, Hunan and other provinces, some springs and wells are very strange, and the water color changes of springs and wells can accurately predict the local weather changes. For example, in Xiang Ding Township, Gulin County, Sichuan Province, a spring water is exposed in the limestone layer, and the spring water forms a sky-blue pond with a water surface area of 50 square meters in the low-lying exposed area. Whenever the weather turns from sunny to rainy, the water turns black; The water turned pale yellow before the rain cleared up. A day or so after the weather changed, the water turned blue again. If the water in the pond is colorful, next year will be fine.

There is a pool of cold mineral water in Chongqing Hot Spring Park. When the water in the spring pool is clear and transparent, it indicates that the weather will clear up. When the pool water becomes turbid and bubbles a lot, it indicates that there will be heavy rain or heavy rain. The observation data for many years show that the water color change of this spring pool is very accurate in forecasting the weather.

A pool that can forecast the weather in Chongqing Hot Spring Park.

There are also such springs near Sujia Village, Haiyang Town, lingchuan county, Guangxi. When the spring is clear, the weather is fine and it won't rain for a day. When milky water like rice soup flows out of the spring, it will rain within 3 days. The amount of mud in spring can also explain the size of rain. On rainy days, if the spring water begins to clear, the weather will clear up. Locals can know the weather changes according to the daily changes of spring water.

On the east side of the new site in Qingfeng Township, Guigang City, Guangxi Province, there is a pond formed by spring water, with a surface area of about 3 mu and several springs with a daily flow of about 30,000 tons at the bottom of the pond. The water in the pool is clear and overflowing all the year round. Strangely, before the heavy rain comes, the water in this spring pool will turn pale red every 12 hour. According to the determination, the pool water contains more than 20 kinds of trace elements such as strontium and radon. However, it is still a mystery why the pool water will turn red before the rainy day.