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Travel to Qiantang River in 2020 _ You must go to Qiantang River for the first time, it's great value ~
Hangzhou tourism has just returned, and I didn't sign up for the tour. It's really worth it and it doesn't cost much. I have visited almost all of Hangzhou, and the scenery is really good. I have compiled a guide to Hangzhou for your reference.
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The closest time for the earth to the sun is 1 early year.
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Why does the Qiantang River ebb and flow every August 18th of the lunar calendar?
Cause of tidal bore in Qiantang: The sun, the moon and the earth are almost in a straight line from August 16th to 18th of the lunar calendar, so the tidal gravity is the largest on this day. Geographical location is related to the trumpet-shaped estuary of Qiantang River. Nearly 500,000 mu of reclaimed land on the south bank of Qiantang River to the east of Zheshan blocked the estuary like a peninsula, making the twelfth section from Zheshan to Qiantang River like a bottle with a small belly, and the tide is easy to enter but difficult to retreat. The outer mouth of Hangzhou Bay is 100 km wide, only a few kilometers wide to the outer 12 sections, and the riverbed in the east of the estuary rises sharply, with high water shoals. When a large amount of tide came in at the mouth of Qiantang River, because the river surface shrank rapidly, it was too late for the tide to rise evenly, so it had to be pushed by the back waves, overlapping layers. Secondly, it is related to the sediment deposition under the Qiantang River, which blocks and rubs the tidal current, making the front slope of the tidal current steep and gentle, thus forming a wave after catching up with the front wave, and one wave overlaps with another. Wind direction: the southeast wind is often blown along the coast, and the wind direction is generally consistent with the tidal direction, which is helpful for the tidal direction. Extended data:
Qiantang River is located in Zhejiang Province, China, and finally flows into the East China Sea. Its mouth tide is qiantang bore, which is famous all over the world. Many tourists come to see this spectacle every year. Before the tide came, a small white spot appeared in the distance, which turned into a ray of silver line in the blink of an eye, and the white line rolled in with the low tide sound. Almost before people can react, the surging tide has roared, with a peak of 3-5 meters. The back wave catches up with the front wave, layer by layer, like a long leucorrhea, overwhelming. As the poem says: "Qiantang seems to be wave after wave, and it is outrageous to suddenly come;" It seems that in ordinary rivers, the energy is amazing. "From far and near, the tide is rushing, pushed by the tide, and the sound is like thunder, and it is Marek's rushing. Tide watching began in Han and Wei Dynasties and flourished in Tang and Song Dynasties. After more than two thousand years, it has become a local custom. References:
Qiantang River Tide Baidu Encyclopedia
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Why did Qiantang bore wait until August 18 to appear the most * *?
The Qiantang River has the highest tide on August 18th of the lunar calendar every year. Why is the bore of Qiantang the largest on August 18th? Tides are caused by the attraction of the moon and the sun to the sea water on the earth's surface. The sun, the moon and the earth line up in a straight line around the first and fifteenth day of each month in the lunar calendar. The gravity of the sun and the moon combine to attract the sea water on the earth's surface, so the tides on the first and fifteenth day of each month are relatively large. Especially around the Mid-Autumn Festival, it is the time when the earth is closest to the sun in a year, so the autumn tide around the fifteenth day of the eighth lunar month is the biggest in a year. The autumn tide in Qiantang River is more spectacular than other places, which is due to the special topography of Hangzhou Bay. The place where Qiantang River enters the sea is called Hangzhou Bay. Hangzhou Bay is wide outside and narrow inside. It is100km wide at sea, but only 3km wide to the west near Yan Guan Town in Haining County. The tide has just entered Hangzhou Bay, and the water surface is wide. The farther to the west, the more restricted by the topography on both sides of the strait, so the water has to accumulate, and the tide head is getting higher and higher, like a vertical water wall, pushing westward. At the same time, due to the action of tidal current, a large amount of sediment spilled into the sea from the Yangtze River is brought to Hangzhou Bay continuously, forming a huge "sandbar" like a threshold at the mouth of Qiantang River. When the sea water pushes the river into the mouth of Qiantang River, the sandbar blocks the tidal head, forming a spectacular scene in which the back waves chase the front waves and wave after wave. Qiantang hole is eight to nine meters high. The tide is coming, surging like a tribe. This is the world-famous Qiantang hole. Since ancient times, Qian Jiangchao has been called the miracle of the world. Whenever the spring tide comes, the waves are rough and magnificent, and the sound of the tide shakes the ground, such as thousands of troops and horses, and the river rolls, which really tends to "cross the river and destroy the mountains." The tidal head is generally 1-2 meters high, and the highest is more than 5 meters. It pushes upstream at a speed of 5-7 meters per second, sweeping and spectacular. Zhang Yu, a writer in the Ming Dynasty, once wrote such a poem for him: "The Luosha River (Qiantang River) is at the beginning of August, and the mountains and seas are vast. Liu Ao rolled up the Milky Way and Ma Benteng crossed the snow. " Tidal bore is a natural phenomenon, and ancient science is backward. This spectacular natural phenomenon cannot be explained, and it is considered as "the entrance and exit of sea urchins" and "the change of dragons". According to legend, during the Spring and Autumn Period and the Warring States Period, Wu Zixu, a general of the State of Wu, was repeatedly persuaded to kill Gou Jian, the king of Yue, and was given a sword by the king of Wu, who whipped him 300 times and threw him into the Qiantang River. Wu's resentment lingered and suddenly turned into a raging storm, seeking revenge on the prince of Wu. Since then, the Qianjiang tide has ebbed and flowed. The legend of Wu Zixu's irrigation into the Tao is because the ancients could not explain the natural phenomenon of tidal bore, out of sympathy for Wu Zixu. From the perspective of modern science, the ocean tides on the earth are periodic movements formed by the gravitational force of celestial bodies (mainly the moon and the earth) and the centrifugal force generated by the earth's rotation. On the first and fifteenth day of the lunar calendar, the earth, the sun and the moon are almost in a straight line, and the gravity of the sun and the moon is very strong, which is easy to form a spring tide. Before and after the Mid-Autumn Festival, not only are their positions just close to a straight line, but this is also the time when the earth is closer to the sun in a year, so the autumn tide is larger, which is also a common natural phenomenon. Why is Qian Jiangchao so big? There are many rivers with tidal bore in the world, such as the Amazon River in South America, the Colorado River in North America, the Seine River in France and the Severn River in Britain. However, the intensity and spectacular phenomenon of tidal bore in Qiantang River are incomparable to other rivers except Amazon River. Although the tidal bore intensity of the Amazon River is comparable to that of the Qiantang River, the estuary of the Qiantang River oscillates frequently and the tidal bore scene changes greatly. Therefore, Qian Jiangchao can be said to be the best and unparalleled. Why is the tide in Qiantang River particularly turbulent and huge? The trumpet-shaped estuary is one of the reasons. The width of the outer channel of Hangzhou Bay is about 100 km, but it shrinks sharply inward. When it reaches Haiyan Ganpu, the mouth of Qiantang River, which is 90km away from the mouth of the bay, the width is only 20km, while the width of the river in Hangzhou is only about 1 km. When a large number of tides rush into a narrow river, the water surface will rise rapidly. Because there is more sediment deposition at the bottom of the river here, the tidal wave entering the estuary meets the sandbar, the water depth decreases, the resistance increases, the front slope becomes steeper and the back slope becomes slower accordingly. When the front slope is steep to a certain extent, the front water surface rises obviously, thus forming tidal bore and even turning over waves. However, there are many rivers in the world that enter the sea, which are large outside and narrow inside, deep outside and shallow inside. Why don't they surge like the Qiantang River tide? It turns out that the appearance of high tide is also related to the river speed. At high tide, its direction is opposite to that of the river. Around the Mid-Autumn Festival, the velocity of Qiantang River estuary is almost equal to that of tide. When rivers with equal strength collide with tides, a huge tidal gap will be aroused. In addition, in the coastal areas of northern Zhejiang, southeast wind or east wind often blows at the turn of summer and autumn, and the wind direction is generally consistent with the tidal direction, which also encourages its momentum. In a word, the formation of the spring tide in Qiantang River is influenced by astronomical and geographical factors (including estuary shape, riverbed landform, hydrology, climate, etc.). ).
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Why is the Qiantang River the biggest spring tide every year on August 18th of the lunar calendar?
From August 16 to August 18 of the lunar calendar, the sun, the moon and the earth are almost in a straight line, so the tidal gravity on this day (the difference between the gravity of the moon, the sun or other celestial bodies on the earth and the gravity of the earth's unit mass, or the resultant force of the inertial centrifugal force generated by the earth's movement around the center of mass of the moon (sun) and the moon (sun). ) the biggest. Tide watching in Qiantang started in the Han and Wei Dynasties (1 6th century) and flourished in the Tang and Song Dynasties (7th century to13rd century). After more than two thousand years, it has become a local custom. Especially around the Mid-Autumn Festival, guests from all directions flocked to watch the wonders of Qian Jiangchao, which was unprecedented. Yan Guan Town, Haining, 50 kilometers away from Hangzhou, is the best place to watch the tide. Extended data:
Classification 1. Crossing the tide is 55 kilometers away from Hangzhou Bay. There is a place called Daxia, which is an excellent place to watch the tide crossing the river. Due to the long-term deposition of sediment, a sandbar is formed in the river channel, which divides the tidal wave from Hangzhou Bay into two waves: the east tide and the south tide. After bypassing the sandbar, the two tidal heads crossed and embraced like two brothers, forming a varied and spectacular cross tide, showing a spectacular scene of "thunder gathering on the sea and waterfalls crossing the river". At the moment when the two tides collided, a water column was stirred up, which was as high as several feet, splashing and stirring. By the time the water column fell back into the river, there were already two tidal heads on the river, which were cross-shaped and quickly ran west. At the same time, the intersection moved northward like an avalanche, hitting the straight seawall, causing huge splash and landing on the top of the pond, scaring tide watchers to scream and avoid. 2. I suggest you drive to Yan Guan as soon as possible and wait for the first-line tide after seeing the cross tide with a big gap. No tide shadow, smell the tide first. There was a loud noise in my ear, and the river remained calm. The noise is getting louder and louder, like drumming on all sides, which is deafening. In the distance, a white line appeared on the foggy river, which moved rapidly to the west, just like "Pingchuan crossing the river, Changpingsha starting from Bai Hong". Closer, the white line becomes a water retaining wall and gradually rises. "If you want to know how high the tide is, you must cross the mountains and waves first." With the rapid advance of a white wall, the tidal bore came to our eyes. With the trend of Ma Benteng, the power of thunder was unstoppable. The first-line tide is not unique to salt officials. Where the river is straight and there is no sand, the tides are all on the same line, but it is not as good as the salt official. The reason is that the position of Yan Guan not far from the upstream and the width of the river channel shrink sharply, and the east and south tides just meet in a straight line, and the tidal level energy is concentrated, and the tidal range is particularly large, usually 1-2 meters, sometimes reaching more than 3 meters. Magnificent and spectacular tidal scene. 3. The tide coming back from the salt official will reach the next tide point, the old salt storehouse. The geographical environment of the old salt warehouse is different from that of the dry salt official. The river is straight and the tidal bore advances westward without any obstacles. For the purpose of reclamation and seawall protection, a 660-meter-long groin was built on the river course of the old salt storehouse. After encountering obstacles, the roaring tide will reflect and turn back, where it will violently hit the opposite dam. Then, with the overwhelming trend of Mount Tai, it rolled back and fell on the torrent moving westward, forming a row of "snow mountains", which, like the roar of a lion, ran back to the east and shook the earth. This is the trend back. The spring tide of Qiantang River is magnificent during the day and poetic at night. Watching the tide is a kind of enjoyment, and listening to the tide is a daydream. No wonder some people say that "the Qiantang national ceremony is not enough to see the hipsters until they are bald."
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Why is the Qiantang River tide the most spectacular in August 18 of the lunar calendar?
August 18 is the day when the moon is closest to the earth. Tides are formed mainly because of the attraction of the sun and the moon. Many times, we think that tides are like waves, so we think that tides are caused by the wind. Actually, it is not. People who live by the sea must be familiar with the fact that no matter how strong the wind is, the sea water fluctuates regularly, which shows that tides have other effects. And this effect is celestial bodies. I believe that when we study physics, we all understand the formula of gravity, but it is difficult for us to feel the gravitational difference brought by celestial bodies. For example, we won't feel the obvious gravity change between day and night. But when this scale is enlarged to astronomical scale, the gravitational effect is obvious. The two main planets, the sun and the moon, have formed a huge gravity on our earth, and this gravity acts on the ground, which is the tidal phenomenon of the ocean.
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Why is it best to watch the tide in Qiantang River on August 18th of the lunar calendar?
The tidal bore in Qiantang is caused by the gravity of the moon. Generally speaking, August 18 is the time when the moon's gravity is the strongest, and the river tide is relatively large. It looks spectacular and lives up to its reputation.
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Just returned from Qiantang River in Hangzhou, I hereby write this strategy!
Qiantang River in Hangzhou teaches you how to prevent pits, so that you can save money and play around Hangzhou! What you need to know to play: 1. Wuzhen, Hangzhou ..
Beijing Xiyou International Travel Agency .. Advertisement
Travel to Qiantang River in 2020 _ You must go to Qiantang River for the first time, it's great value ~
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