If you were watching the tide of Qiantang River on the Qiantang levee at this time, what sentence would you use to express your feelings?

It is expressed by Su Shi's poem "Looking at Zhejiang Tao": the August 18th tide was spectacular. Kunpeng hit the water for 3,000 miles and trained a long drive of 100,000 people. At the end of the Ming Dynasty, red flags embraced each other, and black sand and white waves swallowed each other.

Brief introduction of Qiantang river spring tide;

Qiantang River is one of the three tidal bore in the world, which is caused by the centrifugal effect of celestial gravity and the earth's rotation, as well as the special topography of the bell mouth of Hangzhou Bay. Yan Guan Town, Haining, Zhejiang Province is the first scenic spot (the best scenic spot) to watch the tide, so it is also called "Haining Tide".

In the history of China, there are three famous tidal bore sites: Qingzhou tidal bore, Guanglingtao and qiantang bore. Worldwide, qiantang bore is one of the three tidal bore in the world, namely Ganges Tide, Brazilian Amazon Tide and qiantang bore, China.

Cause of spring tide:

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 geocentric unit mass objects, or the resultant force of the inertial centrifugal force generated by the movement of the earth 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.

Related ancient poems:

Miscellaneous songs, Langtaosha, Liu Yuxi

In August, the waves roared, and the head was several feet high, touching the back of the mountain.

In a blink of an eye, I arrived at Haimen, and the rolled sand was like a snowdrift.

Langtaosha

In August, the waves roared,

The head is several feet high and touches the back of the mountain.

But after a while he went to Haimen,

Roll up the sand like a snowdrift.

Recalling the Poems of Qiantang River —— Li Gou

In the past year, I took a drunken elevator and returned to the sail, which passed vaguely.

The good news is that the culvert by the river is full of light, and the daffodils are all wearing pink shirts.