Since ancient times, water control is a matter that burns money and consumes manpower, and needs to operate for a long time, local officials are usually reluctant to do this kind of stupid thing for their existing political achievements, and Tao Yong, the chief official of Shuzhong, ponders the ethereal thing of immortality every day, it is conceivable that Wen Jihuai must have hit a wall everywhere over the years, and many officials have basically no interest when they hear Wen Jihuai's suggestion to take a long time.

Although Wen Jihuai also knew that Yang Yi had been on the river for two days and two nights, he was still doubting Yang Yi's determination to control the water, so he had a rude temptation, if Yang Yi really wanted to control the water, he would definitely endure himself.

In fact, Wen Jihuai thinks highly of Yang Yi, as a modern person, Yang Yi is actually not interested in the cumbersome etiquette of the ancients, if it is not forced by the form, he prefers to shake hands with each other when others see him.

Yang Yi saw Wen Jihuai saluting him, and hurriedly stood up and said, "Mr. Wen doesn't have to be polite. ”

Wen Jihuai apologized: "I have been rude in my majesty, and I hope His Royal Highness will forgive me." ”

Yang Yi said with a smile: "Of course there are crimes, but if you can tell me the way to cure this Hengchuan River, you will be exempted from all the crimes." ”

Wen Jihuai was stunned for a moment, and seemed to be a little embarrassed to say: "Your Highness, there is naturally a way to control the water, but..."

"But how?"

"I'm afraid that Your Highness won't dare to use it."

Yang Yi shrugged his shoulders and said, "It's better for you not to use the agitation method, I'm not scared." ”

Wen Jihuai said: "Your Highness has misunderstood, this is not a radical method. ”

"Huh? Then tell me about it. Yang Yi suddenly became interested.

Wen Jihuai pondered: "The biggest problem is that the river here turns sharply, forming a big bend, and the violent water potential is constantly hitting the river here every moment, making the curve more and more wide, coupled with the sedimentation of silt and gravel, the water level is constantly raised, and it also indirectly causes the downstream water to be turbulent, creating countless dangers.

Therefore, in order to control the Hengchuan River, we must start from this Jianyu Bay, and tried many methods before, cleaning up the sedimented silt, reinforcing the riverbed on both banks, and even filling the periphery with mud to increase the impact of the flood resistance, these are all ways to treat the symptoms but not the root cause, and after a year or two, the river will return to its original state again, and even become more and more intense. ”

While listening to Wen Jihuai's explanation, Yang Yi looked at the Hengchuan River with a frown, and said thoughtfully: "The water level of this river is getting higher and higher year by year, if it is not cured, it will destroy the world sooner or later." ”

"That's right, so I've been researching and looking for a cure for this root cause in the next few years." Wen Jihuai said.

Yang Yi was puzzled: "Did you find it?" ”

Wen Jihuai nodded and said, "I found it, the only way to solve the problem of Jianyu Bay is... Shunt! ”

"Triage?" Yang Yi was stunned and blurted out, "Where to divide?" ”

Although Yang Yi had not been in Shuzhong for a long time, he also knew that the Hengchuan River was a single river on the south side of Chengzhou Mansion, and there was no way to divert it.

"It's not to be divided elsewhere, but to divide the Yokogawa River here into a partial river." Wen Jihuai took a few steps forward, stood on top of a mountain bag and motioned for Yang Yi to stand up as well.

Wen Jihuai pointed to the other side of the Hengchuan River and said: "The north bank of the Hengchuan River is the Chengzhou Plain, and the south is the mountains, but because of the water potential, it must be diverted from the south side. ”

Yang Yi raised his eyes and saw that the opposite bank was indeed a small mountain, although it was not a big mountain, it was not short.

"Holy! You're not trying to dig up that mountain, are you? Yang Yi opened his mouth wide and exclaimed.

Wen Jihuai nodded cautiously and said, "Yes, if you want to control the Hengchuan River, you must divert it, and if you want to divert it, you must dig up the mountain peak opposite." ”

Yang Yi turned his head to look at the mountain peak on the opposite bank again, and said with a sad face: "You can think of such a thing as Yugong moving mountains, according to what you said, not to mention the time it takes to really achieve the diversion, it is estimated that it will take decades to dig up that mountain alone!" ”

Yang Yi finally knew why Qian Shao said that Wen Jihuai was crazy, and why he was not treated well by officials. It took Li Bing 20 years to repair Dujiangyan back then, and this Wen Jihuai wanted to break the record!

"Wait, Dujiangyan..."Yang Yi had been to Dujiangyan in his previous life, and he had also learned the principle of Dujiangyan's thousand-year-old project, and when he thought about it, he suddenly found that this Jianyu Bay was very similar to the topography of Dujiangyan, and the plan proposed by Wen Jihuai also vaguely had the prototype of Dujiangyan.

Thinking of this, Yang Yi squatted down and picked up a stone on the ground, drew the rudimentary pattern of Dujiangyan with his memory, and said to himself: "The left is the outer river, the right is the inner river, and the top... It should be called a fish mouth...."

Wen Jihuai saw Yang Yi squatting down suddenly, muttering something while drawing a pattern of the two rivers diverging with stones, which looked very similar to Jianyu Bay after the diversion but there were many more things.

After half a loud sound, Yang Yi finally finished drawing the prototype of Dujiangyan, laughed, patted the plaster on his hands, and seemed to be very satisfied with his memory and painting.

"Your Highness, what are you..."Wen Jihuai looked at the pattern and wondered.

Yang Yi smiled and said: "Your diversion method is good, but I have a more perfect plan, you can come and see..."

"After the diversion, a diversion dam will be built above, I call it Yuzui, and it will divide the water of the Hengchuan River into the inner river and the outer river, and the outer river will go straight down, and the inner river can be diverted into the vast plain of Chengzhou. The place between the two rivers is called the flying sand weir, which is used to unload the river sand and can also be used for secondary flood discharge. The end of the last Neijiang is called the Baohuakou, which is the last gate used to control the water level of the Neijiang. ”

Seeing Wen Jihuai's confused face when he heard this, Yang Yi recalled again: "These facilities seem to be bland, but as long as you add some details, the surging flood can turn into a well-behaved little girl, at your mercy."

For example, we can make the bed of the inner river lower than that of the outer river, so that during the dry season in winter, we can ensure that 60% of the water enters the inner river and 40% of the water enters the outer river. And in the spring and summer when the water-saving potential is high, because of the law of bend dynamics, the water flow will rush to the inner side of the river bend, that is, the outer river, and then the outer river will be built wider, the water flow of the inner and outer rivers can be reversed, forty percent of the water into the inner river, sixty percent of the water into the outer river, so that it can ensure that the amount of water entering the plain of Chengzhou is unchanged for eternity. ”

Wen Jihuai was stunned for a moment when he heard this, and seemed to understand whether he understood or not: "Your Highness, what... What is cornering dynamics? …”

"This..."Yang Yi wiped the water stains on his nose with his arm and said: "You don't care about this, in short, I say that wherever the water flows, it will definitely flow!" ”

Yang Yi knew that these things were all seen on the bulletin board of Dujiangyan Tourist Attraction, and he didn't know how to explain what kind of curve dynamics he wanted to talk about. 10