Qianjiang Evening News·Hours News Reporter Zhu Lizhen/Text Xiao Yisan/Photo by Nature is a natural artist. Recently, it created a freehand "ink painting scroll" at the Qiantang River estuary near Haining, near Jiashao Bridge. Towering trees with clear branches and growing on the

Qianjiang Evening News·Hours News Reporter Zhu Lizhen/Text Xiao Yisan/Photo

Nature is a natural artist. Recently, it created a freehand "ink painting scroll" at the entrance of Qiantang River near Haining at Jiashao Bridge. Towering trees with clear branches and growing on the mudflats; the winding and ethereal texture is like the surface of Jupiter, as if there is an interstellar crossing.

Why does this happen at the estuary of the sea? Behind this is actually a geography class.

] After playing photography for more than ten years, he accidentally took this scene

. The veteran photographer Xiao Yisan.

Around 11 a.m. on September 12, he rushed to Jiashao Bridge near Haining. He originally wanted to take pictures of Qianjiangchao . While waiting for the tide, I accidentally encountered this beautiful scene in front of me.

"At that time, the wind and waves were very small, and the sea was almost still, and this scene appeared on the beach. The area was not very large, but it looked more spectacular, like the surface of Jupiter." Xiao Yisan had been taking photos for about ten years. She usually took pictures of some scenery around the city and had some understanding of some natural phenomena.

He knew that this should be the legendary "tide tree". "It usually appears when the tide is low. A photographer has taken photos near in Hangzhou Bay."

Unexpectedly, Xiao Yisan himself encountered it, so he used a drone to shoot. "It looks a bit like the texture of Jupiter's surface, just like interstellar travel."

Under Xiao Yisan's lens, the magical craftsmanship of nature is amazing. Of course, these "tidal trees" are not upright, but "lying flat" on the mud flat, so they are not really towering trees, but paintings of mud and sand carved on the mud flat.

] This is a masterpiece of tides.

What is a "tidal tree"? Is the one Xiao Yisan really a "tide tree"? To this end, Qianjiang Evening News·Houri News reporters consulted the relevant experts of , Zhejiang Provincial Department of Natural Resources .

experts introduced that "tidal trees" are not some kind of plant, but a strange phenomenon in the intertidal zone landform. Intertidal zone landform refers to the part above the average low tide line to the average high tide line, and the "tidal tree" is a unique phenomenon in the tidal beach (silt flat).

generally forms a "tidal tree", and two conditions need to be met. First, the internal factors, that is, the texture of the tidal beach where the "tidal tree" is located is soft and easy to erode, and the content of silt is generally high; second, the external factors, that is, it must have external hydraulic effects. The "tidal tree" generally "grows" with tidal effects. It brings and washes away mud and sand when the tide rises and falls. The tide trenches washed out day after day will become deeper and longer, forming the trunk of the "tidal tree" and extending continuously inland. At the same time, under the influence of lateral erosion and traceability erosion, the "tidal trees" gradually flourished, forming "tower trees".

In other words, the formation of "tidal trees" is a sedimentary landform formed by sea water during the rise and fall of rising and falling, and is also a natural phenomenon. Sometimes when seawater hits ashore, it will bring seaweed , which grows on the "branches" and looks like "leafs". "It is more ornamental, and it is washed by tides, and the 'picture' formed is also dynamically changed. The photos taken today are different from those seen tomorrow."

According to reports, "tidal trees" appear more frequently in coastal areas such as Liaoning, while those along Zhejiang are relatively rare. "In the picture taken this time, the gray one is actually mud, and the formation of 'tidal trees' is also related to the mud content."

experts said that Zhejiang has a lot of farming offshore, with certain human intervention, and the "mud content" is relatively small, which has affected the formation of "tidal trees" to a certain extent.

News +: What's the matter about "tidal tree"

How did the name "tidal tree" come from?

Qianjiang Evening News·Hours News reporters found that as early as May 24 this year, the executive editor-in-chief of "China National Geographic" magazine Danzhiqiang published a Weibo post.He said that in February 2020, the "tidal tree" in the intertidal zone was published, and the first time this landscape was stripped from the ground and named it "tidal tree".

In March this year, CCTV reported on the wonders of "tidal woods" and "bird islands" at the mouth of the Yellow River . The strange tidal force forms a unique and picturesque "tidal tree" at the mouth of the Yellow River.

Under the top of the tidal force, the blue sea water along the tidal groove and penetrates deep into the middle of the yellow sand. Against the backdrop of the surrounding yellow tones, it is like a path that winds into the distance; beside the path, there are street trees formed by "tidal trees", which are large and small in the distance, forming a "tidal forest"; under the main tone of yellow, the colors of the mud and sand are not exactly the same, forming different lines and shapes, just like the outline of the distant mountains on rice paper . The small paths, woods, distant mountains and the yellow sand all over the sky form a quiet landscape painting.

In May this year, " Geography·China " reported on "magic tide tree". Near Yancheng, Jiangsu, some strange patterns and phenomena often appear on the tidal flats.

Institute of Geographical Sciences and Resources, Chinese Academy of Sciences , PhD, introduced in the column that as long as there are tides near the sea, almost all tides can form, especially on mudflats, which form more diverse forms. There is mud on both sides of the tide, and there is powdery sand under the silt, which is relatively soft. The tide carves it, and a "tide tree" is drawn with a light "drawing".

It is worth mentioning that there is a small topic of geography in the college entrance examination that once used the title of "tidal tree", allowing students to briefly describe the formation process of "tidal tree". So, have you mastered the knowledge points of this geography class?

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