When can qanats first appear

Sima Qian's "Historical Records: The Five Emperors" cloud: "Su Su also made Shun pass through the well, and Shun passed through the well to hide the void. Shun is deep, and the elephant goes down to the earth well.

Shun went out from the void. When Shun penetrated the well, he dug a "hidden hollow" (tunnel) from the side, which is very similar to the excavation method of the qanats. If:

This is a historical site in the 21st century BC, more than 1,000 years earlier than the legend that Persia had a qanats in the 8th century BC.

According to historical records: there are 109 B.C. in the era of Emperor Wu of the Western Han Dynasty (141-87 B.C.), there was a well canal in Dali, Shaanxi today, and when the Western Han Dynasty Tun Army Dunhuang attacked Wusun, there was a Bei Hou Well (Dajing Liutong Canal) that took spring water at the foot of the southeast soil mountain in the Bailongdui Desert. In addition, when the Western Han Dynasty attacked Dawan (present-day Samar arid region of Central Asia in the Soviet Union), the locals did not know how to dig wells.

So it should be the reign of Emperor Wu of the Han Dynasty.

It appeared during the Han Dynasty.

In some alluvial fan topography areas of Xinjiang, the soil is mostly gravel, and the water permeability is very strong, after the snow water on the mountain is dissolved, most of it seeps into the ground, and the groundwater is buried deeply, in order to draw out the water that seeps into the ground for irrigation in the plain area, it is more convenient to dig wells and canals. The well-canal technology has been applied in the construction of the Longshou Canal, and the working people of Xinjiang have attracted the construction experience of the well-canal method and applied it to the new geographical conditions to create a new type of irrigation project.

Qanats were introduced to Xinjiang from Persia (present-day Iran) in the 17th century.

QanatsIt was not invented by one person, it was created in the long historical development of the working people of the arid lands

The qanats are a kind of underground water conservancy project created by the working people in the arid land in the long historical development. The qanats diverted groundwater and turned the desert into an oasis, known in ancient times as "wells".

The main principle of the qanats is that the large amount of rainwater, glaciers and snow melt that seeps into the ground in Jeongju in spring and summer.

By using the natural slope of the mountain, the surface is drawn out for irrigation, so as to meet the large demand for production and domestic water in the desert area.

The meaning of the qanats:

The karez water conservancy system is not just about Chinese civilization.

The splendid cultural achievements of the system are an important part of world civilization. The prosperity of Qanats is based on the social, economic and cultural development of the Turpan region.

At the same time, Qanats has also witnessed the economic and cultural exchanges between the East and the West. The Turpan civilization, which has a long history for many years, further illustrates the close relationship between the development and utilization of nature, especially water resources, and the replacement of civilizations in arid areas.

Qanats are a special irrigation system in desert areas, which is widely found in the Turpan region of Xinjiang, China.

Karez is widely distributed and used in Turpan, Xinjiang.

Karez, which means "well", has been recorded as early as in the "Historical Records", when it was called "well canal", and Xinjiang Uygur language called it "kanez". Qanats are a special irrigation system in desert areas, commonly found in the Turpan region of Xinjiang, China. Karez, together with the Great Wall and the Beijing-Hangzhou Grand Canal, are known as the three major projects in ancient China.

There are more than 1,100 qanats in Turpan, with a total length of about 5,000 kilometers.

Categories: Region >> Xinjiang.

Analysis: Karez, together with the Great Wall and the Grand Canal, is one of the three major projects in ancient China, and is a great underground water conservancy irrigation project. It took shape as early as 2,000 years ago in the Han Dynasty.

It is a unique underground water conservancy project in the Turpan Basin that uses the ground slope to draw groundwater. With a total length of 5,400 kilometers, the karez in Xinjiang is the world's largest underground water conservancy irrigation system.

The kaner well is composed of four parts: a shaft, a culvert, an open channel, and a waterlogging dam. The shaft is mainly used for digging culverts and repairing people in and out of the excavation. The culvert is the main body of the qanats, and the open channel is the water channel between the water from the auspicious culvert to the farmland.

A dam is a reservoir that stores a certain amount of water and then irrigates farmland.

In the Bogda Mountains in the north of the Turpan Basin and the Karawucheng Mountains in the west, large amounts of snow and rain flow down the valleys and dive under the Gobi Desert in spring and summer. Taking advantage of the slope of the mountain, people cleverly created qanats to divert underground currents to irrigate farmland. The water does not evaporate due to heat and strong winds, so the flow is stable, ensuring self-flowing irrigation.

It should be that Turpan is too hot, with an annual precipitation of only 16 mm, but the evaporation is more than 3,000 mm, so it must be repaired underground, or it will evaporate and dry. ）

I forgot to tell you that "Kan'er Well" is the meaning of Well in Uyghur language.

Qanats are a kind of underground water conservancy project created by the working people in the arid land in the long historical development. The main working principle of qanats is that people use the natural slope of the mountain to draw a large amount of rainwater, glacier and snow melt water into the ground in spring and summer to meet the production and domestic water needs of desert areas. <

Qanats are a kind of underground water conservancy project created by the working people in the arid land in the long historical development. The main working principle of qanats is that people use the natural slope of the mountain to draw a large amount of rainwater, glacier and snow melt water into the ground in spring and summer to meet the production and domestic water needs of desert areas.

What is a qanat? What kind of role does it have?

The qanats are mainly composed of shafts, underground culverts, above-ground open channels, and waterlogging dams. Among them, the culvert project is the most arduous, which generally has to be excavated for several kilometers to tens of kilometers underground. The extremely arid Turpan has more than 1,500 karez with a total length of more than 5,000 kilometers, known as the underground Great Wall

Since the annual evaporation in the Turpan area is more than 3,000 mm, and the annual precipitation is only 16 mm, in order to prevent the meltwater of the Tianshan Mountains from evaporating from the ground, the ancients introduced the snow water from the Tianshan Mountains from the ground into the oasis. The project was carried out extremely hard, because the snow melt was so cold that the workers had to kneel in the icy water to dig the soil, and the life expectancy of the workers was generally not more than 30 years.

To put it simply, it is a kind of underground water canal, mainly in the Turpan Basin of Xinjiang, which is artificially dug with high mountain snow water.