Chapter 115 I love a river, not the people of the world

"Let's talk about it." Zhang Xuan took a few steps back, and the sound of the waves also weakened a lot, so he turned his head and asked Zhang Jiayu, "Governing the two Huai is to control the water." Zhang Qing has been here for a while, has he figured it out. ”

Zhang Jiayu said: "The minister is ashamed, since the minister arrived, he has supported General Gao to cross the border, appeased the displaced people, and surrendered to the cities. ”

Zhang Xuan is not surprised by this situation.

Because after Zhang Xuan entered Fengyang, he felt that the population was much denser, which was certainly better than the foundation of Henan. But there are also reasons for Zhang Jiayu's governance.

Therefore, Zhang Xuan did not blame Zhang Jiayu, but listened quietly.

"The minister reviewed the ancient books, visited the elders, and the law of water control was the best in the book of the Pan Ministry of Industry in the previous dynasty, and there was no one else in the past dynasties. Therefore, the minister thought that he should follow the old policy of the Ministry of Industry. Beam water to attack sand, store and clear yellow. This is the policy of the Ministry of Pan Gong to control the river. ”

Zhang Xuan nodded and said, "Attacking the sand with water is really a supreme strategy. ”

The so-called Pan Gongbu is Pan Jitao, who was the greatest hydraulic scientist of the Ming Dynasty. Even in modern times, his ideas on water conservancy have been inherited.

It can be said that he is a figure that cannot be ignored in the history of Chinese water conservancy.

Since Zhang Xuan came to this world, he has no entertainment, he can only fall in love with reading, and after a long time, he has a different taste. The Book of Pan Gongbu. "Chenduan Dagong Record", "Two Rivers Pipe Meeting", "River Defense List", "Liuyutang Collection" and so on. I have seen all of these, but if you say how detailed you can see it, you can get the true biography, but it may not be. But a lot of things are still known.

Zhang Xuan believes that among Pan Ji's thoughts on taming water conservancy, attacking sand with water is the most subtle.

The biggest problem of the Yellow River is that the sand content is too high, and the riverbed is piled up, and after a long time, the yellow sand accumulates and becomes a hanging river on the ground, which will naturally burst the embankment.

Pan Ji took advantage of the characteristics of the water flow, tightened the channel of the Yellow River, increased the speed of the Yellow River, deepened the underwater cutting force of the Yellow River, and used the river water to clean the Yellow River bed.

In this way, I don't know how much manpower and material resources are saved, and most importantly, the pain of the Yellow River breaking the embankment and diverting it is avoided, you must know that every time the Yellow River is diverted, it is a tragic catastrophe for the people around the Yellow River.

However, Zhang Xuan may not have fully accepted Pan Jitao's idea of water control, he said: "Saving and brushing yellow may not be a good idea." ”

What is the accumulation of cleaning and brushing.

It is to artificially raise the water level of the Huai River, and then the water of the Huai River washes the Yellow River. to maintain the lower reaches of the Yellow River.

In fact, there are two reasons for this.

The first reason is to protect the Sizhou Imperial Mausoleum, which is where Zhu Yuanzhang's ancestral tomb is located, and it must not be flooded, and Zhang Xuan is here

The general Gaojiayan of the cliff and dangerous city is used to protect Sizhou.

The second reason is to ensure the canal's water supply.

Many people think that the Beijing-Hangzhou Grand Canal, like the current South-to-North Water Diversion Project, flows directly from the south to the north, but this is not the case.

Ancient construction technology, there are many problems.

Needless to say, the area around Shandong has almost become a Zhahe River. Even the canal in the south needs to be replenished in many ways in order to allow the ships to sail smoothly to Jingshi.

Raising the water level of Hongze Lake is also a way to replenish the canal.

As long as the capital is built in Beijing, the Beijing-Hangzhou Grand Canal is a lifeline. It is simply impossible to ignore it, and even its strategic importance must be above the people of Lianghuai.

Even if the people of Lianghuai are in a disaster, they can still be appeased. But once the Jingshi ran out of food, the imperial court could not sustain it.

Therefore, almost all the ministers who govern the river know an unspoken rule.

The Yellow River is important, but the importance of the canal is still above the Yellow River. The two water veins are connected to form a complex water system.

Under such circumstances, Zhang Xuan was sure that all of Pan Jitao's plans were by no means the best plan, but a compromise in this case.

Zhang Xuan couldn't restore Pan Ji to the ground. But it also needs to be the minister of Great Xia to control the water. Open your mind and engage in it.

From Zhang Jiayu's words, he knew that Zhang Jiayu's water control strategy was nothing more than to restore this place to its original state, build the Gaojiayan on the south side of Hongze Lake again, and even rebuild the canal.

Zhang Jiayu bowed down and asked, "What does Your Majesty mean?" ”

Zhang Xuan said: "Ming Chengzu built the capital of Beijing, and this canal became the dragon vein of the Ming Dynasty. ”

"This is the shipping technology of the country and the DPRK, far above the previous dynasty."

"Therefore, although this Grand Canal is good, when it comes to this dynasty, it will be over."

"I don't love a river but not the people of the world. From then on, the grain transfer in the north and south, all by seaway, is customized by this dynasty, and those who dare to dig the canal will be killed. ”

"Since this canal is no longer needed, what I want to see is the Yellow River, the Huai River, and the Yangtze River, each doing its own thing."

"The people of Lianghuai live and work in peace and contentment. Therefore, it is necessary to harness water and attack sand, but it is not necessary to store and clean and brush yellow. ”

Zhang Jiayu said: "Your Majesty's love for the people will definitely move the heavens, but in this way, the national policy of governing the river will change." Since His Majesty did not have the heart to rebuild the canal, it was better to make the Yellow River flow into Hongze Lake and gather with the Huai River, and then follow the old canal from Hongze Lake to the Yangtze River into the sea. ”

"The minister has already checked, the Yellow River flows into the sea, and it is only a shallow water. If you want the Yellow River to flow into the sea, you have to put a lot of effort into it. ”

Zhang Xuan listened to it and understood it in his heart.

No matter how powerful the method is, it is impossible to completely solve the problem of too much sand in the Yellow River, and the further downstream, the more sediment accumulates in the river.

Originally, the position of the bottom of Hongze Lake was much lower than the position of the Yellow River, because there was more water in Hongze Lake, so the Yellow River would not flow into Hongze Lake.

But now that the water level of Hongze Lake has been discharged for thousands of miles, the water of the Yellow River naturally flows lower.

This is what we are doing.

If the Yellow River, the Huai River, and the Yangtze River are grouped together according to the current form, and flow into the sea through the mouth of the Yangtze River, it seems that it will save trouble, but Zhang Xuan feels that there is a big hidden danger.

Zhang Xuan said to Zhang Jiayu: "Zhang Qing thinks that in this case, how long can this set of water systems last?" ”

Zhang Jiayu pondered for a while and said, "The minister doesn't know. ”

"The topography of Yangzhou is also relatively high in the north of the Yangtze River, from Hongze Lake to Yangzhou topography all the way down, but it is different near Yangzhou. The terrain is not very high, though. But it can also block the flow of water. ”

"In this way, under the accumulation of sediment in the Yellow River, the terrain near Yangzhou will only get higher and higher. As for when the water will flow backwards, it is really difficult to calculate. ”

Zhang Xuan also understands this. After all, he also fought Yangzhou City at the beginning.

If nothing else, just the canal.

When the Ming Dynasty had just built the canal, the water of this section of the canal in Yangzhou flowed from south to north, and later Hongze Lake was flooded and repeatedly poured back. In the Qing Dynasty, it simply became a flow from north to south.

It has become a waterway for Hongze Lake to discharge floodwater.

Just by looking at the flow of water, we know that in fact, this road to the sea is not so smooth.

However, the water level is too high today. It flows into the Yangtze River unimpeded.

Even the four words unimpeded must be put in quotation marks.

Because it is very simple, even now, the Yangzhou area has not formed a fixed river, but almost flat three feet of water flowing.

Even if a river is dug out manually in the future, how long can it last?

Ten years, twenty years?

Zhang Jiayu also has no confidence in his heart.

Zhang Xuan said: "This is not what I am most worried about, the Yellow River water division is fierce, but the Yangtze River water potential is weak?" Is the water of the Huai River a soft persimmon? ”

"Now that the three rivers are classified as one river, the rivers in the lower reaches of the Yangtze River can support it?"

"If the sediment of the Yellow River blocks the waterways of the lower reaches of the Yangtze River, it will be a flood in the world."

Is it possible that the sediment of the Yellow River will raise the waterways of the lower reaches of the Yangtze River, so that the Yangtze River will not flow smoothly into the sea? It may not be possible to say no, but Zhang Xuan also thinks it is unlikely.

Just thinking about this possibility, Zhang Xuan already shuddered.