Since you are here, how can you give up halfway?

After Zhang Shun finished reading the Guanghui Qukou, he asked Zhang Jinyan to lead everyone to walk to the "dianer's mouth".

When Zhang Shun approached the mountain and looked, he realized what the situation was like.

It turns out that the so-called Danerzui is actually a mountain bag in the canyon upstream of the Jinghe River exit.

The river is vast and the water is abundant.

"As a man said, when you open your mouth, you will be filled with water in the corners of the kitchen."

Zhang Jinyan couldn't help but point to the mountain bag and said to Zhang Shun: "From this way, we dig stone caves, which are less than a mile away, and it is estimated that it will take several years. From this way, we will irrigate the Jing River to benefit all ages!"

Are you teasing me?

Zhang Shun almost laughed out loud when he heard this. After 17 years of Guanghui Canal, it only took 279 steps to open the stone canal and 288 steps to open the stone cave. The sum of the two is less than one and a half miles.

Now you tell me to dig through this mountain bag with a diameter of more than one mile, and it took several years to make it?

After all, Zhang Shun was born in the construction industry in his previous life and had an intuitive feeling about engineering quantity.

If you put the previous life, just use machinery and explosives, don’t talk about this small mountain bag, you just let him level the entire Zhangjiashan. As long as the funds are in place, everything will not be a problem.

But in this era, not to mention shield machines, there are not even excavators or dirt trucks. What are you digging a cave that has more than one miles away?

Relying on manpower, it took nearly twenty years to dig through this mountain bag. How could I know that the Jing River would not continue to cut down and be discarded again?

"No, no!" Zhang Shun shook his head and said, "It took a lot of manpower and material resources in vain, but it has been a Guanghui Canal for decades!"

"If a dam is built, it can completely solve the water level problem, but it is also afraid of silt."

"What if a cofferdam is established and the water level is raised by binding waterways?"

"Not even possible. The faster the river water, the faster the cut down the waterway!"

"Wait, take everything?"

Zhang Shun couldn't help but flashed his inspiration and actually squatted straight on the ground, picked up a stone, and started writing and painting on the ground.

During class in the past life, the teacher once told about a classic hydraulic engineering Dujiangyan in ancient China.

Due to the years and years, Zhang Shun almost forgot all the details. But he remembered a basic principle of Dujiangyan: "Four and six parts of water, two and eight parts of sand."

In fact, due to the different geography and terrain, even if Zhang Shun knows all the details, he may not be able to copy another Dujiangyan.

But Zhang Shun learned something from it.

Since the river water is cut down as fast as it is, and the river water is slow to accumulate, what if the river water is not fast or slow, it will form a balance of sludge?

Just as Zhang Jinyan and others looked puzzled, they watched Zhang Shun write and draw, and said something they didn't understand, and they were stunned for a moment.

Just when this was the case, I suddenly heard Zhang Shun ask: "When is this Guanghui Canal officially water-irrigated in which year?"

"The construction of Chenghua in the 17th year is about 150 years ago." Zhang Jinyan calculated with his fingers for a long time.

"It takes more than six feet to cut in one hundred and fifty years, and four minutes to cut in every year. It is so powerful that Guanghuiqu has been abandoned for a hundred and fifty years!" Zhang Shun obtained the data, calculated it orally, and shook his head and smiled bitterly.

"I have already known all the reasons. The solution is in the river but not in the canal. If you write articles at the entrance of the canal, even if it takes nearly twenty years for the people of the five counties to spend!"

"How do you say this?" Zhang Jinyan was stunned when he heard this.

This dispute between Jing and Jing did not start with Zhang Jinyan alone. In fact, as early as the 11th year of Jiajing, Neo-Confucianist Ma Li proposed to "drill the canal" and "drill the canal and reach Guanghui".

During the Wanli period, Yuan Huazhong, the magistrate of Jingyang, wrote a special "Onliness of Kaidian'er's Mouth", rejected the plan of Kaidian'er's Mouth, and advocated "rejecting Jing to attract springs."

At this point, the two sides argued endlessly, so in the original history, during the Qianlong period of the Qing Dynasty, they argued several times, and finally, Emperor Qianlong ruled to "reject Jing and lure the spring" as the correct plan.

As a result, Zhang Shun opened his mouth and had a game of "in the river but not in the canal". How can he convince the public?

Zhang Shun couldn't help but smile and said, "The Jing River has two shortages, so it is a flood."

"One said: The water is cut down quickly, and the river surface is lower than the mouth of the canal in just a few years."

"The second said: There is too much sand, and the water diversion will silt the channels over time, and it has to be re-didnated."

"These two are diseases of Jingshui, not Qushui, do you agree?"

Zhang Jinyan pondered for a moment when he heard this, and couldn't help but say: "The King of Qin is a real god. I think about it and compare it with what I saw and heard in the past. It's true!"

"I just don't know how to resolve this matter to benefit all ages?"

No matter how nice you say it, the key is one sentence, how to solve it?

"I have already made a solution to the matter of cutting down the river and raising the canal at the entrance." Zhang Shun smiled and said, "It's just the four words "sinking sand and cutting"."

"What is 'shen sand and cut'?" Zhang Jinyan couldn't help but be shocked.

"The Jing River comes out of the valley, and the drop is too large, and the river flows very fast, so it cuts into the river channel, and over the years, the riverbed sinks."

"Therefore, we should slow down the water and accumulate sand to make up for the shortcomings of cutting under the riverbed and make it balanced."

"This... this... the King of Qin is really a god who descends to earth, and makes people admire him from the mountains and walks in the scenery!" Zhang Jinyan himself was quite aware of water conservancy, and was shocked when he heard this.

Since Zheng Guo Canal for thousands of years, people have regarded river water sinking as a disaster, and purifying water and sand as a disaster. I never expected that some people could think of the method of stopping sinking with sand and attacking with troubles.

"If this is the case, wouldn't we have to dig a wide river surface to slow down the water?" Zhang Jinyan knew the elegant meaning when he heard the strings, and immediately thought of a specific solution.

"That's right, but in this way, the river sand still enters the canal and the damming channel needs to be cleaned once in more than ten years." Zhang Shun couldn't help but say regretfully.

"It's okay, it's okay. As long as you don't dig the penis again, the Qin King's method is already great!" Zhang Jinyan couldn't help but be happy to hear this. How could he take some flaws to heart?

But Zhang Shun thought about it but could not solve the problem of water and sand separation, so he had to give up in disappointment.

In fact, Zhang Shun didn’t know that the digging of Zhengguo Canal in history was not as simple as irrigation.

Instead, the Qin State deliberately "used the water filled with turquoise and irrigated more than 40,000 hectares of marsh land."

The so-called "barrier land" is the so-called saline-alkali land in later generations.

The earliest function of Zhengguo Canal was to attract silt and sand during the flood period of the Jinghe River and improve the original saline-alkali land.

It turns out that the Jing River flows through the Loess Plateau and the silt and sand carried by it has a certain degree of breathability and fertility. Qin uses the Zheng State canal to combine irrigation, fertilization and soil improvement, and wins three goals at one time.

So many hundred years later, after people were full and overwhelmed, some of Zhang Shun's fans firmly believed:
Chapter completed!