What is the cause of spring tide in Qiantang River?

The reason for the formation of the Qiantang River spring tide is the need for good weather, favorable geographical conditions and favorable winds.

Time: from August 16 to August 18 in the lunar calendar, the sun, the moon and the earth are almost in a straight line, so the tidal force (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))

Geographical location: It is related to the trumpet-shaped estuary of Qiantang River. On the south bank of Qiantang River, nearly 500,000 mu of land was reclaimed to the east of Zheshan Mountain, which blocked the estuary like a peninsula, making the section from Zheshan Mountain to the outside of Qiantang River 12 km look 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, and it is only a few kilometers wide to the outer 12 sections. The riverbed in the east of the estuary suddenly rises and the beach is shallow. When a large number of tides flood in from the mouth of Qiantang River, due to the rapid contraction of the river,

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.

Historical origin

Watching autumn tide in Qiantang has become a custom as early as the Han, Wei and Six Dynasties, especially in the Tang and Song Dynasties. According to legend, August 18 of the lunar calendar is the birthday of the tide god, so the tide peak is the highest. In the Southern Song Dynasty, the imperial court stipulated that the navy division should be inspected on the Qiantang River on this day. Later, they became accustomed to each other, and August 18 gradually became a tide-watching festival. Pan Lang, a poet in the Northern Song Dynasty, wrote in Jiuquanzi:

Long memories of watching the tide, full of people vying to see the river. I suspect that the sea is empty and drums are beating all around. Xiang Tao, the frolic in the frolic, stands upright and keeps the red flag wet. I don't see the dream a few times, but I am still chilling.

This poem is a true portrayal of the activities of "making waves" and "watching the tide" in those years.

References:

Baidu encyclopedia-Qiantang chamber

Edited on 2018-10-13.

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What is the cause of spring tide in Qiantang River? Say the answer briefly.

Cause of the spring tide in Qiantang River: Time: From August 16th to 18th of the lunar calendar, the sun, the moon and the earth are almost in a straight line, so the tidal force (the difference between the gravity of the moon, the sun or other celestial bodies on the earth and the gravity of the earth's center of mass, or the resultant force of the inertial centrifugal force generated by the earth's movement around the center of mass of the moon (the sun) and the gravity of the moon (the sun)) is the largest. Geographical location: It is related to the trumpet-shaped estuary of Qiantang River. On the south bank of Qiantang River, nearly 500,000 mu of land was reclaimed to the east of Zheshan Mountain, which blocked the estuary like a peninsula, making the section from Zheshan Mountain to the outside of Qiantang River 12 km look 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, and it is only a few kilometers wide to the outer 12 sections. The riverbed in the east of the estuary suddenly rises and the beach is shallow. When a large number of tides come in from the mouth of Qiantang River, the river surface shrinks rapidly, and then it is related to the sediment deposition under Qiantang River. The sediment deposition blocks and rubs the tidal current, which makes the front slope of the tidal current steep and gentle, thus forming a wave that catches up with the previous wave and then overlaps with the other wave. 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.

18 Browse 2020-09-02

The reason for the formation of the Qiantang River spring tide is

Cause of spring tide: 1, date: August 16 to August 18 in lunar calendar. The sun, the moon and the earth are almost in a straight line, so the tidal force (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 objects, or the movement of the earth around the center of mass of the moon (sun). 2. Geographical location: It is related to the trumpet-shaped mouth of Qiantang River. Nearly 500,000 mu of land was reclaimed to the east of Zheshan on the south bank of Qiantang River, which blocked the estuary like a peninsula, making the section from Zheshan to the outside of Qiantang River look like a small belly bottle, and the tide is easy to enter but difficult to retreat. The outer mouth of Hangzhou Bay is 100 km wide, and the outer 12 section is only a few kilometers wide. The riverbed in the east of the estuary suddenly rises and the beach is shallow. When a large amount of tidal water comes into the mouth of Qiantang River, it is too late for the tidal water to rise evenly due to the rapid contraction of the river surface, and it needs to be pushed forward wave after wave. Layer upon layer. 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. 3. Wind direction: 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:

Tide-watching custom: On the 15th day of the eighth lunar month, the tidal bore of Qiantang River is the largest, and the tidal head can reach several meters. On August 18 of the lunar calendar, the water army inspected the Qiantang River and then observed it as a festival. In addition to the tide-watching festival around August 18 of the lunar calendar, there are quite large tides at the beginning and middle of each month in the lunar calendar, which can be used as a "tide-chasing tour". Around the Mid-Autumn Festival, guests from all directions flocked to watch the wonders of Qian Jiangchao with unprecedented pomp. Or rush to the river bank at the high tide at the beginning of the year, hurting the tide watchers. The literature contains the poem "Poem Collection of Shi Jing Jiangnan Jingtang Qiantang Guankong": "At first, it began to rain, and suddenly I saw the sea and wanted to float the mountain. Ten thousand people retreat like soldiers, and the turbid waves are higher than the reading altar. " Haining Yan Guan Scenic Area, 50 kilometers away from Hangzhou, is the best place to watch the tide. In ancient Hangzhou, the Phoenix Mountain and Jianggan area were the best places to watch the tide. Due to the change of geographical location, Yan Guan in Haining has been the first scenic spot to watch the tide since the Ming Dynasty, so it is also called "Watching the Tide in Haining". "Qianjiang Tao Qiu" is famous at home and abroad, and it was popular as early as the Tang and Song Dynasties. On the day of tide-watching, especially in the days around August 18 of the lunar calendar, there were cars and people on the road. Overlooking the bell mouth of Qiantang River, the tide forms turbulent waves, just as Malik is rushing. When the sandbar of the riverbed near Ganpu is blocked, the tidal wave rises by three to five meters, and the tidal range is as high as nine to ten meters. There is indeed a trend of "the sky is full of turbid waves and the rivers and mountains are destroyed". Different places can enjoy different tidal scenes: the tower sees the "first-line tide", the babao sees the "confluence tide", and the old salt warehouse can enjoy the "ebb tide". Historical origin: Qiantang autumn tide has become a common practice as early as the Han, Wei and Six Dynasties, especially in the Tang and Song Dynasties. According to legend, August 18 of the lunar calendar is the birthday of the tide god, so the tide peak is the highest. The Southern Song Dynasty imperial court once stipulated that the navy division should be inspected on the Qiantang River on this day, and later it became a habit along the river, and August 18 gradually became a tide-watching festival. Pan Lang, a poet in the Northern Song Dynasty, wrote in his Jiuquanzi: Looking back at the tide, the people in Manzhouli fought for the river. I suspect that the sea is empty and drums are beating all around. Xiang Tao, the frolic in the frolic, stands upright and keeps the red flag wet. I don't see the dream a few times, but I am still chilling. This poem is a true portrayal of the activities of "making waves" and "watching the tide" in those years.

809 likes132,287 browse 20 19- 10-30.

What is the cause of spring tide in Qiantang River? Please write down the answer simply.

The reason for the formation of the Qiantang River spring tide is the need for good weather, favorable geographical conditions and favorable winds. Time: from August 16 to August 18 in the lunar calendar, the sun, the moon and the earth are almost in a straight line, so the tidal force (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)) Geographical location: It is related to the trumpet-shaped estuary of Qiantang River. On the south bank of Qiantang River, nearly 500,000 mu of land was reclaimed to the east of Zheshan Mountain, which blocked the estuary like a peninsula, making the section from Zheshan Mountain to the outside of Qiantang River 12 km look 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, and it is only a few kilometers wide to the outer 12 sections. The riverbed in the east of the estuary suddenly rises and the beach is shallow. When a large number of tides come in from the mouth of Qiantang River, the river surface shrinks rapidly, and then it is related to the sediment deposition under Qiantang River. The sediment deposition blocks and rubs the tidal current, which makes the front slope of the tidal current steep and gentle, thus forming a wave that catches up with the previous wave and then overlaps with the other wave. 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. Historical origin Qiantang viewing autumn tide has become a common practice as early as the Han, Wei and Six Dynasties, especially in the Tang and Song Dynasties. According to legend, August 18 of the lunar calendar is the birthday of the tide god, so the tide peak is the highest. In the Southern Song Dynasty, the imperial court stipulated that the navy division should be inspected on the Qiantang River on this day. Later, they became accustomed to each other, and August 18 gradually became a tide-watching festival. Pan Lang, a poet in the Northern Song Dynasty, wrote in his Jiuquanzi: Looking back at the tide, the people in Manzhouli fought for the river. I suspect that the sea is empty and drums are beating all around. Xiang Tao, the frolic in the frolic, stands upright and keeps the red flag wet. I don't see the dream a few times, but I am still chilling. This poem is a true portrayal of the activities of "making waves" and "watching the tide" in those years. References:

Baidu encyclopedia-Qiantang chamber

46 like 3335 to browse 20 19-08-30

What is the cause of spring tide in Qiantang River?

1. Of course, the cause of the spring tide in Qiantang River is also inseparable from celestial movement. From August 16 to August 18 in the lunar calendar, the sun, the moon and the earth are almost in a straight line, so the sum of the gravitational forces generated by the centrifugal motion of the sea water and the moon is the largest. Coupled with the deflection angle and rotation movement of the earth itself, the phenomenon of seawater rising tide is more obvious. 2. Nearly 500,000 mu of land reclamation east of the south bank of Qiantang River blocked the estuary like a peninsula, making Qiantang River like a bottle with a small belly and a big mouth, and the tide is easy to enter but difficult to retreat. When there are a large number of tidal bore in the mouth of Qiantang River, because of the small river surface, the water can not rise evenly, so we have to use the back wave to push the front wave and stack it layer by layer to form the tidal bore. 3. Qiantang River is located in Hangzhou Bay, where the Pacific tidal waves come straight from the east and the tidal range on the west coast of the East China Sea is the largest. Therefore, various reasons come together and contribute to the tidal bore of Qiantang River. Extended data:

Qiantang River Tide Classification 1, Cross Tide (also known as Cross Tide) There is a place called Daxia in Ding Qiao Town, Haining City, 55 kilometers away from Hangzhou Bay, which is an excellent place to watch the Cross Tide. Due to long-term sediment deposition, a sandbar was formed in the middle of the river, which divided the tidal wave from Hangzhou Bay into two parts: 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, splashing huge water and landing on the top of the pond. 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. References:

Baidu encyclopedia-Qiantang river tide

135 likes 1, 634 browses 20 19- 10-26

What is the cause of spring tide in Qiantang River?

The attraction of the moon to the earth and the special structure (trumpet shape) of the Qiantang River estuary. (1) In the solar system, the greatest force on the earth is the gravity of the sun, but according to Newton's first law, the lunar calendars of other stars on the earth are still very large. (2) Usually, the surrounding areas around the earth cancel each other out, but in the Mid-Autumn Festival of the lunar calendar, the distance between the moon and the earth is the closest, and the forces exerted by celestial bodies such as the sun on the earth are almost on the same line, so the sea water is the most attractive on this day. (3) Hangzhou Bay outside the Tangjiang River is a very typical trumpet-shaped bay, which is wide outside and narrow inside, deep outside and shallow inside. The estuary is 100 km wide, reaching Ganpu in the west, and the river suddenly shrinks to 20 km. When we arrived in Yan Guan Town, Haining, the river was only 3 kilometers wide. At high tide, the wide and deep bay mouth swallowed a lot of seawater at once. With the rapid contraction of the river, it becomes narrower and shallower, and the rushing tide on the road can't rise evenly, so the waves behind push the waves in front, and each wave is higher than the other. Near Dajiashan, there is a huge underwater sandbar, and the tide swarms in, setting off a towering and amazing wave, forming a steep water wall and forming the initial tidal peak. The tidal pattern of Qiantang River is 1, and the ebb tide will reach the next tidal attraction-Laoyancang. The geographical environment of the old salt warehouse is different from that of Yan Guan, where 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 warehouse. After encountering obstacles, the roaring tide will be reflected back, where it will violently hit the opposite dam, and then turn back with the tide of Mount Tai and fall on the rapids moving westward, forming a row of "snow mountains". 2. Crossing Tide (also known as crossing Tide) In Ding Qiao Town, Haining City, there is a place called Daguan, 55 kilometers away from Hangzhou Bay, which is an excellent place to watch crossing Tide. Due to long-term sediment deposition, a sandbar was formed in the middle of the river, which divided 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 in 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 a huge splash and landing on the top of the pond, scaring the tide watchers to scream and avoid. I suggest you drive to Yan Guan as soon as possible and wait for the first-line tide. 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. 4. The best places to see Qian Jiangchao are Zheshan Scenic Area in Nanyang, Xiaoshan and Yanguan Town in Haining. The main thing to see at Meiren Dam is "low tide". The tide of "beauty turning back" refers to the tide formed by rapid advancement after encountering artificial obstacles such as groins. 5. Midnight Tide At midnight, there was a faint rustle on the river, and the tide rose. On the foggy water, there is a piece of melanin floating intermittently. After a while, the sound suddenly increased, and the tide came with a thunderous thunder, smashing the moonlight of the whole river into silver. The tide is like tens of millions of gray-maned horses pushing, biting and spitting, and rushing straight down the pond, like hundreds of thousands of troops in Enemy at the Gates. The front waves of tidal bore attract the back waves, and the back waves push the front waves, forming a pile of towering tidal peaks on the river surface, and the waves are as high as the sky, as if rushing to the bright moon for nine days. At this time, many tourists threw bonfires and reed flowers into the river and went with Percy to express their good wishes. 6. The ghost king tide is on the 18th day of the seventh lunar month, that is, the spring tide in the seventh lunar month. 7. The two tides of the T tide formed the word "D", and we don't know how this spectacle was formed. The cause of T-tide needs to be studied. 8. Strange Tides There are various riverbeds in Qiantang River. Maybe the first meter of this river is shallow and the last meter is deep. There are many bends and different tidal levels, and tidal waves encounter obstacles similar to sandbanks. These may be the reasons for the formation of similar "strange tides".

4 Like 134 Browse 20 19-08- 16

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