Why did Zheng Guo build the Zheng Guo Canal, and what was the reason for the construction of the Zhe

Zheng Guo is a personal name, a Korean water conservator. In 237 B.C., the Qin Dynasty proposed to dig a canal, and later generations named the canal after him as Zhengguo Canal.

Zheng Guoqu should be a crooked product.

Originally, Zheng Guo wanted to use this project to drag down the Qin State, consume the manpower and material resources of the Qin State, and make it incapable of using troops against the Six Kingdoms, but the completion of the Zheng State Canal greatly promoted the production capacity of the Qin State.

The original intention was to drag down the national strength of the Qin State by repairing canals.

Later, the scheme was revealed.

But at that time, Qin Prime Minister Lu Buwei insisted on completing it.

Finally, the project for the benefit of the country and the people was completed.

Before Qin Shi Huang unified the six countries, South Korea tried to reduce the military pressure of Qin, and sent a water engineer named Zheng Guo, who said that Qin used manpower to build a water conservancy project to divert Jing water for irrigation, so he built the Zheng Guo Canal.

The Zhengguo Canal starts from Jingshui in the west through Gukou in Shanxi Province (now north of Jingyang County, Shaanxi Province), passes through the turbid water and Shichuan River in the north of Sanyuan in the east, and then flows east through Fuping and Pucheng South to flow into Luoshui. With a total length of more than 300 li, the "more than 40,000 hectares of land of Zelu" on both sides of the canal have been irrigated, and Guanzhong has become a land of ointment, enhancing the economic power of the Qin State.

Construction features

The level of surveying reflected in the construction is already quite high, and the main canal lines make full use of the local topography. Zheng Guoqu traverses several rivers, but it can make different flowing waters go their own way without interfering with each other. In addition to the usual longitudinal flow, there is also a transverse circulation, the upper water flow flows from the convex bank to the concave bank, and the maximum flow velocity in the river channel is close to the position of the concave bank slightly downstream, facing the mouth of the channel, so the channel inflow is large.

The fine sand and mud from the water flow enter the canal and form field silt irrigation. However, the lower layer of the transverse circulation flows from the concave bank to the convex bank, washing the coarse sand moving at the bottom of the river to the convex bank, so as to prevent the coarse sand from entering the canal to block the irrigation channel. The hydrological knowledge discovered by Zheng Guo has been used in future generations of hydraulic projects.

The reason for the construction of the Zhengguo Canal was to make the Qin State rich and strong and achieve great unification.

At the beginning of the reign of King Yingzheng of Qin, Korea wanted to delay the pace of Qin's eastward advance. In 246 BC, King Huan Hui of Han adopted a very clumsy so-called "tired Qin" strategy in a desperate situation. Zheng Guo, a famous hydraulic engineer, was sent as a spy to persuade King Yingzheng of Qin to build a large irrigation canal between Jingshui and Luoshui.

On the surface, it was said that Qin's agriculture could be developed, but its real purpose was to exhaust Qin's strength, so that Qin would spend manpower and material resources on water conservancy construction, and would not be able to attack Korea eastward.

King Yingzheng of Qin knew that in order to dominate the world, he must have strong economic strength. There was originally a plan to vigorously develop the water conservancy of the Qin State, and under the inducement of Zheng Guo's skillful tongue, the Qin King Yingzheng quickly adopted this suggestion, and immediately collected a large number of manpower and material resources and appointed Zheng Guo to preside over the construction of this project.

Zheng Guoqu was built in the first year of the reign of King Qin (246 BC), which was originally a "tired Qin" plan in Korea. Korea sent Zheng Guo, a famous hydraulic engineer at that time, to Qin to help repair the canal, in an attempt to consume a large amount of manpower and material resources of Qin, so that it could not afford to look eastward in order to maintain the dominance of the six Kwantung countries.

It didn't disappear, it was just forgotten by the dynasty.

In the winter of 1985, Qin Jianming from the Shaanxi Provincial Cultural Relics Protection Center came to Jinghe.

side, and finally found the missing Zheng Guoqu.

It is located in the Liquan in the area of the Gukou of the Jing River.

Between Wanli Village and Shangran Village, the place called "Tiger Ridge" by the locals is the site of Zhengguo Qushou more than 2,000 years ago, it is completely artificially piled up of miscellaneous soil, not natural original, "Tiger Ridge" is "Qin soil". At this point, Zheng Guoqu, who had been lost for thousands of years, finally surfaced.

At the end of the Warring States Period, the history of our country developed in the direction of establishing a single country, and some powerful vassal states wanted to unify the whole country with themselves as the center. State of Qin.

If you want to do something in the East, South Korea is the first to bear the brunt, and South Korea is so weak that it is vulnerable. In desperation, King Han Huan adopted a very clumsy so-called "tired Qin" strategy, he used the famous water conservancy engineer Zheng Guo as a spy, traveled west into Qin, and lobbied Qin to be in Jingshui.

A large irrigation canal was dug between it and Luoshui.

At that time, the annexation wars between countries were very fierce, and it was the military that fought the war, but the economic power supported the war. During the Warring States period, the agricultural economy was in a dominant position, and in order to be invincible in the war, it was necessary to vigorously develop agriculture and increase grain production to meet the needs of the long-term war. The Qin State originally wanted to develop water conservancy, Guanzhong.

It was also the agricultural base of the Qin State, so this suggestion was quickly accepted, and a large amount of manpower and material resources were immediately collected, and Zheng Guo was appointed to preside over the construction of this project. The project began in the first year of Qin Wangzheng (246 years ago), and was completed after more than ten years of great efforts, known as Zheng Guoqu.

After the completion of the Zheng State Canal, the Qin State became rich and strong, and finally annexed the vassal countries. And the state of Wu.

Although there is no direct evidence that it was because of the construction of the ditch.

As a result, the country was weakened, but it is an indisputable fact that it took only four years from strength to decline. The Zhengguo Canal of the Qin State was indirectly for war, and its direct use was to irrigate farmland and increase grain production, while the Hangou was directly for war both in terms of conceived and practical use.

At the site of Zhengguo Canal, there are currently three dark holes arranged in the north and south, namely the water inlet of Zhengguo Canal. Each dark hole is 3 meters wide and 2 meters deep, and there are obvious traces of white ash masonry outside the south entrance. Seven large earth pits began to appear on the ground from northwest to southeast in an oblique row, and the original underground trunk canal was communicated between the soil pits, so it was called "well canal".

The enormity, rational design, advanced technology, and remarkable effectiveness of the Zhengguo Canal Project are rare in the history of water conservancy in ancient China and rare in the history of water conservancy in the world.

As of March 11, 2021, Zheng Guoqu did not disappear.

Zhengguo Canal, a great project built by the ancient working people, belongs to the earliest large-scale water conservancy project built in Guanzhong, located on the north bank of the Jing River, 25 kilometers northwest of Jingyang County, Shaanxi Province today. It diverts Jing water in the west and injects Luo water in the east, which is more than 300 miles long.

The Zhengguo Canal was dug by the Qin State in the last years of the Warring States Period. It was built in 246 B.C. (the first year of the reign of King Qin) by Zheng Guo, a Korean hydraulic engineer, and was completed about ten years later.

On November 8, 2016, the 2nd World Irrigation Forum and the 67th International Executive Council held in Chiang Mai, Thailand came with good news.

Zheng Guoqu. In the last years of the Warring States period by the Qin State.

Piercing. It was built in 246 B.C. (the first year of the reign of King Qin) by Zheng Guo, a Korean hydraulic engineer, and was completed about ten years later.

At the end of the Warring States Period, Qin's national strength was thriving, and it wanted to have something to do in the East, and South Korea bore the brunt. In order to avoid being destroyed by Qin, South Korea sent Zheng Guo, a famous water conservancy engineering expert, as a spy into Qin and persuaded Qin to be in Jingshui.

and Luoshui to build a large irrigation channel. It is really a "tired Qin" policy. After seeing through it, Zheng Guochen took the pros and cons, and the king of Qin ordered Zheng Guo to repair a canal for irrigation. Qucheng Qin King ordered this canal to be Zheng Guoqu.

The historical role of Zheng Guoqu:

The role of Zhengguo Canal is not only that it has exerted irrigation benefits for more than 100 years, but also that it is the first to open up the irrigation of Jing and have a far-reaching impact on the irrigation of later generations. After the Qin Dynasty, successive dynasties continued to improve its water conservancy facilities here: successively through the Baigong Canal in the Han Dynasty, the Sanbai Canal in the Tang Dynasty, the Fengli Canal in the Song Dynasty, the Wangyushi Canal in the Yuan Dynasty, the Guanghui Canal and the Tongji Canal in the Ming Dynasty.

Qing Dynasty Longdong Canal and other channels of the past dynasties.

There was a folk song in the Han Dynasty: "Where is the field?" Ikeyo, Taniguchi.

Zheng Guo is in front, and Baiqu is behind. Lifting a gong is a cloud, and breaking a ditch is rain. Jingshui is a stone, its mud is several buckets, and irrigation and dung, and I grow a millet.

Food and clothing, the mouth of billions. "What is praised is the diversion project. Guanzhong, Shaanxi Province in 1929.

There was a major drought, and there was no harvest for three years, and hunger was everywhere. Irrigation is urgent.

Mr. Li Yizhi, a well-known water conservancy expert in modern China, was ordered to resolutely take up the heavy task of repairing the Jinghui Canal on the site of Zhengguo Canal. Under his personal auspices, the canal broke ground in December 1930, and thousands of migrant workers worked hard for nearly two years to finally build the Jinghui canal today. In June 1932, water was released to irrigate the fields, and the water diversion was 16 cubic meters per second, which could irrigate 600,000 mu of land.

Since then, it has continued to benefit the people.

Zheng Guoqu did not disappear, but was forgotten by the dynasty.

After the completion of the Zheng State Canal, the Qin state became rich and strong, and finally annexed the vassal states. Although there is no evidence to directly prove that it was caused by the construction of Hangou, it is an indisputable fact that there were only four years from prosperity to decline.

The Zhengguo Canal in the Qin State was used directly to irrigate farmland and increase grain production, while the Han ditch was used directly for warfare, whether abolished. At present, there are three dark holes in the north and south of the Zhengguo Canal site, that is, the introduction of the Zhengguo Canal. Each dark cave is 3 meters wide and 2 meters deep, and there are obvious traces of white ash masonry outside the south cave.

Seven large earth pits began to appear on the ground from northwest to southeast in an oblique row, and the original underground trunk canal was communicated between the soil pits, so it was called "well canal".

The Zhengguo Canal Project, which is rare in the history of water conservancy in ancient China, has reasonable design, advanced technology and remarkable practical results, and is also rare in the history of water conservancy in the world.

Zheng Guoqu is now Jingyang County, Shaanxi Province.

Zhengguoqu is located in the Guanzhong Plain in Shaanxi Province.

In the middle, the Neijing River basin in the North Zhongshan Mountain. It is an irrigation project that has a profound impact on the course of Chinese history, the Zhengguo Canal was built in 246 BC, and it was built for the Qin State during the Warring States Period.

The economic foundation of a strong and unified China was laid.

On November 8, 2016, Zheng Guoqu was successfully declared as a "World Irrigation Engineering Heritage". Zheng Guoqu, the first canal in the world, will shine for thousands of years and stay in Shi Yewu forever.