Information about the tide of the Qiantang River, information about the tide of the Qiantang River

Hangzhou Bay is trumpet-shaped, with a large mouth and a small belly. The Qiantang River channel narrows and rises sharply from the west of Luopu, so that the capacity of the riverbed suddenly shrinks, and a large amount of tide water is crowded into the shallow river, the tide head is obstructed, and the tide behind it advances rapidly, forcing the tide head to stand steeply, breaking up, and a spectacular scene appears.

However, the river estuary is trumpet-shaped a lot, but the estuary that can form a tidal surge is a few, scholars believe that the generation of the tide is related to the ratio of the river flow speed to the tidal wave velocity, if the speed of the two is similar, evenly matched, it is conducive to the generation of the tide, if the speed of the two is far apart, can not form the tide.

Also, Hangzhou Bay is on the west coast of the East China Sea, and the tidal range of the East China Sea is larger than that of the East Coast. After the tidal wave of the Pacific Ocean enters the East China Sea from the northeast, it is offset to the right by the Coriolis force in the process of moving southward, so that the tidal range of the west coast is greater than that of the east coast.

Generally speaking, the Qiantang River tide occurs from the first day to the beginning of each lunar month.

3. The 15th to the 18th of the lunar calendar appears, and the tide of the 8th lunar month is the most spectacular. Fan Zhongyan of the Song Dynasty Zeng Shiyun: "The sea thunders and thunders, and the waterfall in the heart of the river is horizontal."

Haining Yanguan Town has become the best place for the tide of the Qiantang River because of the spectacular "first-line tide". And every year, people are swept away by the tide and lose their lives because of watching the tide.

August 18 tide, spectacular world nothing", this is Su Dongpo's praise of the Qiantang River tide through the ages. Every year around the eighteenth day of the eighth month of the lunar calendar, on the sea pond at the mouth of the Qiantang River, tourists gather to see the wonders.

There are three best places to watch the autumn tide in Qiantang: a section of the sea pond in the southeast of Yanguan Town, Haining County, is the best point, where the tide is the most vigorous, and it is characterized by a line of lines. The second best spot to watch the tide is Babao, 8 kilometers east of Yanguan Town, where you can enjoy the wonder of the tide colliding.

The third good spot to watch the tide is the old salt warehouse 12 kilometers west of Yanguan Town, which can be admired"Returning tide"。

Yu Yafei Shiyun: "Qiantang looks at the waves, and the tide is in front of you in an instant; It seems that in the ordinary river water, the energy can be shocking", at the beginning of the tide, a white line across the river flashed in the sky, accompanied by a rumbling sound. The tide is coming from far and near.

The tide pushes and embraces, the sound gradually increases, and in an instant, the white tide peak rushes in front of you, and a water wall three or four meters high stands upright on the river surface, like ten thousand horses galloping.

The Qiantang River is located in Zhejiang Province of China, and eventually flows into the East China Sea, the tide at its mouth is the Qiantang tide, which is famous all over the world, and there are many tourists who come to this wonder every year. Classification of some species of the Qiantang River tide:

1. Cross tide: (also known as cross tide) In Dingqiao Town, Haining City, 55 kilometers away from Hangzhou Bay, there is a place called a big gap, which is an excellent location for cross tide. Due to the long-term siltation, a sandbar is formed in the middle of the river, which divides the tidal wave from Hangzhou Bay into two streams, namely the east tide and the south tide.

After the two tides bypass the sandbar, they are like two brothers crossing each other, forming a varied and extremely spectacular cross tide, presenting a spectacular scene of "thunder gathering on the sea surface, and waterfall in the heart of the river". At the moment when the two tides collide, a column of water is stirred, several feet high, and the waves splash and are thrilling.

2. First-line tide: After seeing the cross-tide of the big gap, it is recommended that you drive to Yanguan as soon as possible and wait for the first-line tide. Before seeing the shadow of the tide, I heard the sound of the tide first.

There was a loud rumbling sound in my ears, and the river was still calm. The sound became louder and louder, like beating the drums of war on all sides, deafening. In the distance, a white line appeared on the foggy river surface, which quickly moved westward, just like "practicing the Hengjiang River, and raising the white rainbow on the flat sand".

3. Turning tide: The tide from Yanguan upriver will reach the next tide-watching spot, the old salt warehouse. The geographical environment of the old salt warehouse is different from that of Yanguan, the river channel of Yanguan is straight, and the tide rushes westward without hindrance, and on the river channel of the old salt warehouse, out of the need to reclaim and protect the sea pond, a 660-meter-long barrage dam was built.

The roaring tide will be reflected back after encountering obstacles, where it violently hits the opposite embankment, and then rolls back with the momentum of Mount Tai pressing the top, and falls on the westward rapids, forming a row of "snow-capped mountains", rushing back to the east at a galloping speed, the sound is like a lion's roar, earth-shattering, this is the turning tide.

Qiantang tide is famous all over the world, and many tourists come to this wonder every year. Before the tide arrived, a small white dot appeared in the distance, which turned into a silver thread in the blink of an eye, and with a muffled thunderous tide, the white thread tumbled in.

Hardly give people time to react, the surging tide has been roaring, the tide peak is as high as 3-5 meters, the back wave catches up with the front wave, layer upon layer, like a long white belt, there is a tendency to overwhelm the mountains and the sea.

The largest river in Zhejiang Province. In ancient times, it was called Zhejiang, Zhejiang, Zhejiang, and Zhejiang. It originates from the southwest of Xiuning County, Anhui Province, and the east slope of Liugujian in the Huaiyu Mountains at the junction of Anhui and Jiangxi provinces (the elevation of Liugujian is meters, and the elevation of the source is about 1350 meters).

The main stream flows through Anhui and Zhejiang provinces, and enters Hangzhou Bay at the Nanzui of Changshan in Luopu County, Haiyan County, and the West Third Gate on the border of Yuyao City and Cixi County. It has a total length of 605 kilometers and a basin area of more than 10,000 square kilometers. It is between 28°04 30°24 north latitude and 117°39 121°14 east longitude.

The topography of the basin slopes from southwest to northeast, and the main stream flows northeast into Hangzhou Bay. The river has a plume system.

Qiantang tide refers to the tidal phenomenon that occurs in the Qiantang River basin of Zhejiang Province, due to the gravitational force of the moon and the sun, which causes the periodic rise and fall of the ocean water surface.

Introduction to Qiantang Chao.

Qiantang Tide - The Most Spectacular Sea Tide In the history of our country, there are three most famous tides: Shandong Qingzhou tide, Guangling tide and Qiantang tide. Qing Fei Ao Huang (1664-) "Guangling Tao Debate" cloud:

In the Spring and Autumn Period, the tide flourished in Shandong, and the Han Dynasty and the Six Dynasties flourished in Guangling. After the Tang Dynasty and the Song Dynasty, the tide flourished in Zhejiang, covering the earth from north to south, and there were those who really knew it." The Qiantang tide appeared later than Guanglingtao, and was formed in the Eastern Han Dynasty at the latest.

Wang Chong's "On Heng and the Book of Fiction" mentions that "Zhejiang, Shanyin River, and Shangyu River all have waves". He also said that at that time, Qiantang and Zhejiang "all built the temple of Zixu, and they wanted to comfort their hatred and stop their fierce waves". However, Wang Chong only said that "there are waves in the Qujiang River in Guangling, and the literati give it to it", and did not say that the tide of the Qiantang River is endowed with it.

It can be seen that in the Eastern Han Dynasty, Qiantang Chao was far less famous than Guanglingtao. It is estimated that the custom of watching the tide in Qiantang had not yet been formed at that time. The cause of the Qianjiang tide.

Celestial time: From the 16th to the 18th day of the eighth month of the lunar calendar, the sun, the moon, and the earth are almost in a straight line, so the tidal gravitational force on the sea water on this day (the difference between the gravitational attraction of the moon, the sun or other celestial bodies on the earth's unit mass object and the gravitational force of the earth's centrium on the earth's centroid (sun), or the resultant force of the inertial centrifugal force generated by the earth's movement around the earth-moon (sun) center of mass and the moon's (sun) gravity. Maximum.

Geographical advantage: It is related to the trumpet-shaped shape of the Qiantang River estuary. Nearly 500,000 acres of reclaimed land east of Zheshan on the south bank of the Qiantang River blocked the mouth of the river like a peninsula, making the Qiantang River Zheshan to the outer ten explanatory maps.

The second section is like a bottle with a big mouth and a small mouth, the tide is easy to advance and difficult to retreat, the outer mouth of Hangzhou Bay is as wide as 100 kilometers, only a few kilometers wide to the outer 12th section, the riverbed of the eastern section of the estuary rises suddenly, the beach is high and the water is shallow, when a large amount of tide water pours in from the Qiantang estuary, due to the rapid shrinking of the river surface, the tide does not have time to rise evenly, so it has to push the back wave to the front wave, layer upon layer. Secondly, it is also related to the sediment under the Qiantang River, which blocks and rubs the tide, making the front slope of the tide steeper and the speed slowing down, thus forming the back wave catching up with the front wave, and the wave on top of each other. Wind:

Southeasterly winds often blow along the coast, and the direction of the wind is roughly the same as that of the tide, which contributes to the tide.

The characteristics of the Qiantang tide in this section.

The most famous Qianjiang tide was formed in Nanyang, Xiaoshan.

On the south bank of the Qiantang River, Xiaoshan, Nanyang's Zheshan Beauty Dam and Haining's Yanguan Town are the best scenic spots in the Qianjiang River. The main thing to watch at the beauty dam is the "turning tide". The "beauty two turn back" turning tide refers to the tide that is rapidly moving forward, and the tide formed after encountering artificial obstacles such as Ding Dam.

Located on the south bank of the Qianjiang River, Zheshan Bay in Nanyang, Xiaoshan is a large river bay at the mouth of the Qiantang River that recesses southward. Here, there is a road about 500 meters long.

The tide of the Qianjiang River began in the Han and Wei dynasties, flourished in the Tang and Song dynasties, and lasted for more than 2,000 years. The Southern Song Dynasty is scheduled to inspect the sailors on the Qiantang River on the eighteenth day of the eighth month of the lunar calendar (the so-called birthday of the tide god), and then follow the habit of taking this day as the tide watching festival. The traditional tide-watching resort is Yanguan Town, Haining, so it is also called "Haining Tide".

This area has scenic spots such as Zhenhai Tower, Tanah Lot Temple, and Zhongshan Pavilion.

After the two tides go around the sandbar again, they are like two brothers who cross each other, the itinerary is varied, the extraordinary spectacular cross tide presents the sea surface, the thunder gathers in the heart of the river, the spectacular phenomenon of the waterfall horizontally, the two tides collide, and instantly stir up a water column as high as a few occupies, and the waves splash and are thrilling.

The largest and most spectacular tide in our country is the tide of the Qiantang River, the tide head is as high as about 8 meters, the tide head propulsion speed reaches nearly 10 meters per second, its spectacular scene, surging, majestic, as if thousands of troops and horses marching together, making a thunderous sound, it is really a wonder of the world. The Qiantang River flows into the East China Sea in Hangzhou Bay, and the estuary is wide on the outside and narrow on the inside, reaching 100 kilometers wide at the point and only a few kilometers at the narrow point. As soon as the sea water enters the estuary, the water surface is wide, and the further it goes, the more it is constrained by the topography on both sides of the river, the sea water has to gush up, and it accumulates higher and higher, and the water flowing out of the Qiantang River is blocked, which promotes the water level to rise, like an upright water wall.

When the sea water behind continues to pour in, it forms a spectacular scene of the back waves catching up with the front waves, wave after wave.

The Qiantang tide was formed in the Eastern Han Dynasty at the latest, and the tide viewing custom appeared in the Eastern Jin Dynasty, famous in the Northern and Southern Dynasties, and was very violent in the Tang Dynasty, and the tide watching in the Song Dynasty became a scale.

In addition to the gravitational influence of the moon and the sun, the cause of the majestic Qianjiang tide is also related to the trumpet-shaped shape of the Qiantang River estuary. Nearly 500,000 acres of reclamation land in the east of Zheshan on the south bank of the Qiantang River like a peninsula block the estuary, so that the Qiantang River Zheshan to the outer 12 sections resemble a bottle with a big mouth and a small mouth, the tide is easy to advance and difficult to retreat, the outer mouth of Hangzhou Bay is as wide as 100 kilometers, and the outer 12 sections are only a few kilometers wide, the riverbed in the eastern section of the estuary rises suddenly, the beach is high and the water is shallow, when a large amount of tide water pours in from the Qiantang estuary, because the river surface shrinks rapidly, the tide does not have time to rise evenly, so that the back wave pushes the front wave, the front wave does not run fast, the back wave catches up, layer upon layer. Secondly, it is also related to the sediment under the Qiantang River, which blocks and rubs the tide, making the front slope of the tide steeper and the speed slowing down, thus forming the back wave to catch up with the front wave, one wave on top of the other, one wave higher and one wave surge.

The Qiantang River, formerly known as Zhejiang, is the largest river in Zhejiang Province. With a total length of 410 kilometers and a basin area of 420,000 square kilometers, it flows into Hangzhou Bay below the gate of Hangzhou. The mouth of the river is trumpet-shaped, and the tide is poured back, becoming the famous "Qiantang tide".

The Qiantang tide is also called "Haining tide", and the sea tide seen in Haining on the eighteenth day of the eighth lunar month every year is the most spectacular. Because the Qiantang estuary is trumpet-shaped, it is gradually shallow and narrow inward, and the tidal wave propagation is constrained. When the tide hits, the height of the tide head can reach 3

5 meters, tidal range up to 89 meters.

On August 18 of the lunar calendar, people who come to Haining, Zhejiang Province to watch the tide gather in groups and are endless. At this time, the shore is crowded with people, and people are anxiously waiting for the arrival of that exciting moment. After a while, I suddenly saw a commotion in the crowd, and I saw a white line in the distance, from far to near; In an instant, the tide head of the wall, like a tall wall of water, swept in, making a thunderous roar, deafening.

This is really: "The monstrous turbidity waves are emptied, and the rivers and mountains are destroyed." This is the world-famous tide of the Qiantang River.

The turbulent and spectacular Qiantang tide has always been known as "the wonder of the world". People usually call this tide "surge tide", and some people call it "angry tide". The phenomenon of tidal surges is also seen in many estuaries.

Such as the Amazon River in Brazil, the Sennar River in France, etc.

The tide of the Qiantang River in China is also world-famous. Why is there such a spectacular surge? First of all, it is related to the shape of Hangzhou Bay, where the Qiantang River flows into the sea, as well as its special topography.

Hangzhou Bay is trumpet-shaped, with a large mouth and a small belly. The channel of the Qiantang River narrows and rises sharply from the west of Luopu, resulting in a sudden reduction of the capacity of the riverbed, a large amount of tide water is crowded into the shallow river, the tide head is obstructed, and the tide behind it advances rapidly, forcing the tide head to stand steeply, break up, and roar, and there is a thrilling and spectacular scene. However, there are many river estuaries that are trumpet-shaped, but there are only a few estuaries that can form a tidal surge.

Scientists believe that the generation of the tide is also related to the ratio of the speed of the water flow in the river to the speed of the tide wave, if the speed of the two is the same or similar, evenly matched, it is conducive to the generation of the tide, if the speed of the two is far apart, although there is a trumpet-shaped estuary, the tide can not be formed.

In addition, the estuary can form a tidal surge, which is related to the size of the tidal difference in the location of the river. Since Hangzhou Bay is on the west shore of the East China Sea, and the tidal range of the East China Sea, the west coast is larger than the east coast. After the tidal wave of the Pacific Ocean enters the East China Sea from the northeast, it shifts to the right due to the geostrophic deflection force in the process of moving southward, so that the tidal difference between the two sides of the strait is greater than that of the east coast.

Hangzhou Bay is located in the place where the Pacific tidal wave rushes directly to the east, and it is also the direction with the largest tidal range on the west coast of the East China Sea. Therefore, various reasons came together to contribute to the tide of the Qiantang River.