The Great Zhou has been suffering for a long time!

How did Liangshanbo come about?

It is that after the Yellow River broke many times, the flood rushed to the east, and finally stayed in the ancient Juyeze place, and converged into 800 miles of Shuibo Liangshan.

The historical records record the scene at that time: "The shore destroyed 700 steps, overflowing the city of Zhouzhou, Li, Pu, Cao, Yun, and Zhuliang Mountain. ”

Later, Liangshanbo had a vast water surface and abundant products, and was also an important water conservancy and transportation hub.

But don't forget how many cities were submerged and how many people were displaced in the process of forming Liangshanbo.

The major matter of river defense is related to the country, but the Yellow River is so untamed that the Great Zhou Dynasty has to study water conservancy from the Son of Heaven to the common people.

Even a former gentleman like Gu Tingye can casually say one, two, three.

The same is true for Cho Tse-young.

In fact, Zhao Ceying has always paid great attention to collecting the guidelines and strategies for river management in the counties along the river for his own reference, and the Junchuan rake mentioned to Wei Chen earlier is one of them.

However, today's policy of controlling the river is like putting soil on the wall, filling the tiles in the house, governing the river every year, breaking the embankment every year, and there is no end to it every year.

Every summer and autumn, when the river rises, the people along the river are so nervous that they are all nervous, and it is common to be shocked three times in one night.

Zhao Ceying was still full of confidence in the Junchuan rake, thinking that this move was quite creative, and it might be able to solve the dilemma of the Great Zhou River defense.

But after hearing Wei Chen's explanation, Zhao Ceying realized that this Junchuan rake was useless compared to the previous method.

The hope that was finally born was shattered, which made Zhao Ceying a little frustrated.

However, Gu Tingye noticed Wei Chen's expression when he spoke, and when he saw that he looked confident, his heart suddenly moved, and he immediately asked, "Is there a good plan in Xingyun's belly?" ”

Hearing Gu Tingye's words, Zhao Ceying, who was lowering his head and sighing for a long time, was also in good spirits, and hurriedly looked up at Wei Chen, with a look of hope in his eyes.

"It's actually quite simple."

Wei Chen's eyes were blazing, and he said loudly: "Four words, follow the trend!" Since the water of the Yellow River can bring sediment, it can also carry sediment away. ”

"Can you bring it, or you can take it with you?"

Gu Tingye only felt that the second monk was confused, and he didn't understand the meaning of Wei Chen's words.

Zhao Ceying on the side frowned, as if he was thoughtful, but he thought about it and never understood the essentials.

Seeing the bewildered looks of the two, Wei Chen smiled and explained: "For a long time, the methods used to control the flooding of the Yellow River can be boiled down to two types, in addition to building high embankments and dams on both banks, the other method is to slow down the flow of water in the river. ”

"Urgency is urgency, and division is slow, which is the characteristic of water flow. Is there anything wrong with taking advantage of the situation? Gu Tingye said curiously.

Wei Chen shook his head with a smile and said: "Specialization is urgent, division is slow, of course this is true, but as everyone knows, there is another sentence, urgent is clear, slow is silt!"

The moisture is slow, the sand stops, and the river is full.

The Yellow River carries eight buckets of sand with two liters of water, and once the water slows down, the sediment carried by the river will accumulate in the river, causing the riverbed to become higher and higher.

As a result, the embankment was forced to be heightened, and eventually it became a hanging river on the ground for boats on the roof, like a sharp sword hanging over the heads of all the people along the river! ”

"It turns out that the hanging river came like this, and the strategy of dividing the water potential to control the river turned out to be wrong from the root!"

Hearing Wei Chen's penetrating analysis, Gu Tingye and Zhao Ceying both suddenly realized.

"As a method of water control, there is nothing wrong with separating water potential."

Wei Chen corrected in time: "When the Yellow River floods in autumn, the river will usher in a round of surge, and if the water cannot be diverted in time, it is likely to cause the embankment to burst. In order to prevent catastrophic floods, it is necessary to divide the flood in a planned manner.

However, if we look at it from the perspective of long-term governance of the Yellow River, river control is sand control, and we should still build embankments to restrain water and attack sand with water, which is the strategy of harnessing water and attacking sand! ”

"Attacking the sand?"

Gu Tingye and Zhao Ceying were a little stunned for a while when they heard this new term popping out of Wei Chen's mouth.

"It is to build another embankment in the existing embankment to narrow the river channel, so that the water flow will be accelerated, and the sediment will be carried away." Wei Chen patiently explained.

As he spoke, he picked up a branch and sketched and demonstrated it to Gu Tingye and Zhao Ceying on the silt next to the river embankment.

"The river is contained by the inner embankment, and it is natural to brush the riverbed, and the riverbed becomes deeper, which is equivalent to the embankment on both sides of the bank becoming higher, and in the long run, the embankment is naturally stable, and the situation of the hanging river on the ground can also be greatly improved."

Wei Chen's words were unique, which was very different from the universally recognized view of river governance in this era, which made Gu Tingye and Zhao Ceying think deeply.

The two thought for a long time about the schematic diagram drawn by Wei Chen on the silt, and finally felt that Wei Chen's method was ingenious and could fundamentally solve the problem of the Yellow River's riverbed rising year by year in one fell swoop.

Zhao Ceying was once again impressed by Wei Chen's erudition and talent, and respectfully bowed deeply to Wei Chen, and sincerely admired: "Mr. is really the reincarnation of Heboye!" ”

Gu Tingye said with some emotion: "Xingyun, you are from Jiangnan, but you know how to govern the Yellow River better than those of us who grew up on the banks of the Yellow River, which is really embarrassing!" ”

In the face of the praise of the two, Wei Chen just waved his hand humbly.

He knew very well in his heart that the water and sand attack that Gu Tingye and Zhao Ceying were both amazed by was actually just a palliative measure.

The real solution is to clarify the Yellow River so that it no longer carries so much sediment.

In fact, the sediment carried by the Yellow River comes from Guanzhong and Guanxi, and further up, it is as clear as a spring all year round.

The reason for this is that Guanzhong and Guanxi have been indiscriminately deforested for thousands of years, and the barren mountains are everywhere.

As soon as there is rain, this sediment flows into the Yellow River with the flow of water, which causes the current situation of one bowl of water and half a bowl of sand in the Yellow River.

In order to solve the root cause, it is necessary to restore the ecological environment upstream and make the mountains again covered with lush vegetation so as to avoid soil erosion.

In order to achieve this, the manpower and material resources required are an astronomical amount, and the time consumed is extremely long, and there may not be much results in persisting in a hundred years, which is a cause that needs to be completed by several generations or even more than a dozen generations.

However, one of the major characteristics of the feudal dynasty is that the people are dead, and it is tantamount to a fool's dream to expect the court to be able to work together and consistently complete a great plan that lasts for thousands of years.

Even if it is a major matter related to the country's river defense, there will be no exception in this regard.

Wei Chen has long understood this.

Therefore, it is more practical to take such an emergency strategy as harnessing water and attacking sand, at least to ensure that the people on both sides of the river will not suffer from the river for several decades.