Dahan first prince

Chapter 111 The Watermaster Prince?

In the autumn and September of the tenth year of the Han Dynasty, Xinwei (the eighth day of the lunar new year).

On the third day after arriving at Lian Shao, the magistrate of the lower reaches of Zhengguo Canal, Liu Ying finally waited for the long-overdue Shaofu Yangchengyan at the temporary pillar of Lian Shao County.

In fact, Yang Chengyan set off from Chang'an several days earlier than Liu Ying. Logically speaking, when Liu Ying arrived at Lian Shao, Yang Chengyan should have been waiting here early.

But in fact, Yangchengyan's first stop after starting from Chang'an was not Lian Shao on the south bank of the lower reaches of the Zhengguo Canal, but Sanyuan in the middle and upper reaches of the Zhengguo Canal.

As for the reason...
"How is the Young Mansion doing with the investigation of the situation?"

After a simple greeting, Liu Ying didn't go around too much and went straight to the point.

Hearing Liu Ying's question, Yang Chengyan couldn't help but look a little solemn.

"It's all over."

"Four days ago, I sent Shaofu water workers there to cut off the Zhengguo Canal at Jingkou."

"The minister went to see it in person, and explored it carefully with the water craftsmen of the Shaofu, and finally got this time, the detailed plan for the renovation of the Zhengguo Canal."

With that said, Yang Chengyan did not forget to take out a roll of bamboo slips with a little dry mud from his bosom, and handed it to Liu Ying for collection.

Taking advantage of Liu Ying's reading time, Yang Chengyan also narrated at the side: "I have already calculated that for the construction of the Zhengguo Canal, all the canal sections west of Sanyuan, more than [-] miles away, should be filled with soil at the bottom of the canal. Raise its position."

"There is no rush for this matter; it won't be too late to fill in the soil after the winter solstice freezes and the downstream plug is cleared."

"As for the one hundred and seventy miles east of Sanyuan and west of Lianzhao, there are nearly one hundred and fifty miles, and there is no need to fill or dig mud."

"If you have free time, you can dig out the silt in the ditch and replace it with soil; if you don't have free time, don't do it."

Listening to Yang Chengyan's narration, Liu Ying also nodded slightly.

That's right.

After setting off from Chang'an, Yang Chengyan rushed to the head of the Zhengguo Canal where Jingshui flowed into.

In the next few days, Yangchengyan's only job was to check and calculate the Zhengguo Canal sections in order from west to east, that is, from upstream to downstream, and how to repair them.

Needless to say, the entire Zhengguo Canal, especially the channel in the middle and lower reaches, has been widened.

The most important thing is to calculate the renovation plan for each section of Zhengguo Canal.

That is: How much soil needs to be filled in each part of the upstream?
Which parts of the midstream can be ignored, and which parts need maintenance and repair?
Of course, the most important thing, and the most urgent thing at the moment, is the downstream that is blocked by sediment, causing the water flow to slow down or even close to extinction. How deep do we need to dig?
Yang Chengyan quickly answered this question.

"The first thing to do in the construction of the Zhengguo Canal is to dig and dredge the blocked canal section downstream; the specific section of the river should start from twenty miles west of Lianchao to the end where the Zhengguo Canal joins the Luoshui River, a total of one hundred and ten miles. "

"As for the depth of the excavated sand, the minister planned to calculate: for a hundred and ten miles, the first ten miles should be dug for more than two feet, and every ten miles thereafter should be dug for an extra foot."

"When you reach the end of Zhengguo canal, you should dig a foot and three feet deep..."

Listening to the specific data given by Yang Chengyan, Liu Ying could not help but feel a little surprised that he had expected it.

——One foot and three feet, but nearly three meters!
In other words, in just 13 years since Qin II, the Zhengguo Canal, which has not been systematically maintained, has deposited at least three meters of sediment in its downstream!
You must know that when Qin Xiang Lu Buwei built the Zhengguo Canal, the depth of the Zhengguo Canal was only three feet!
In other words, Zhengguo Canal, which was originally nine feet wide at the bottom, fifteen feet wide at the top, and three feet deep, has become today's fifteen or sixty feet wide at the bottom, twenty feet wide at the top, just because it has not been maintained in just over ten years. More than ten feet deep, but less than two feet deep.

The height of the canal is increased due to the accumulation of sediment, and the width of the canal is also enlarged because of the people and the widening of the place...

It can only be said that it is no small miracle that the Zhengguo Canal can still flow and can barely be used to divert water to irrigate the fields!

But this time, Liu Ying was ordered by the emperor Liu Bang to renovate the Zhengguo Canal, the reinforcement of the upstream water and soil, and the widening of the entire canal were secondary.

The most important, and most urgent, is directly related to the flow of the Zhengguo Canal next year, and the agricultural water used by the people in Weibei. It is still the downstream, that is, the 110-mile section of Yangcheng Yan just mentioned, which is about 45 kilometers long. Dredging the blocked river section .

It is only necessary to dig down the bottom of the 110-mile blocked canal from the current depth of seven or eight feet to the original depth of about three feet, and the situation of Zhengguo Canal will be greatly improved.

As for paving the upper reaches with stone bricks and scorpions, fixing civil engineering, filling soil to reduce the width of the Zhengguo Canal, and even collecting water and washing sand in the middle and lower reaches, there is no need to worry too much.

And from the current autumn, September [-]th, to the middle and late October when the temperature in Guanzhong cools down, the rivers are frozen, and the sediment at the bottom of the canal turns into frozen soil, there is only more than one month left.

That is to say, there are only about [-] days left for Liu Ying to clear the blockage in the downstream section and complete the most important part of the Zhengguo Canal renovation work.

Thinking of this, Liu Ying's face also showed a little urgency.

"When will the dredging of the silted canal start?"

"Also, in the past few days, how many people have come from Weibei to work hard for the canal's renovation?"

As if feeling the urgency in Liu Ying's heart, Yang Chengyan couldn't help but feel a little serious.

"The Zhengguo Canal has been waterless for four days since the head of the canal. Two days after tomorrow, when the mud at the bottom of the canal dries up, we can start work to dig out the sediment downstream!"

"And hard work..."

Speaking of this, Yang Chengyan paused for a moment, and gradually a touch of sincere admiration welled up in Liu Ying's eyes.

"As of today's time, there are more than [-] people who have come from Weibei!"

"If you don't wait for a few days, I'm afraid there will be [-]. If you work hard, you may be able to finish the renovation work downstream before the winter solstice!"

From Yang Chengyan's mouth, knowing that the problem of forced labor has been basically solved, Liu Ying's sense of urgency eased a little.

"In this way, there is no need to worry about the lack of hard labor."

——In a few days, the officers and men of the Northern Army and General Zhonglang will go to the straight roads all over Weibei to repair the straight roads that have been crushed by stone bricks!

At that time, let alone [-] to [-], even if [-] to [-] strong laborers came spontaneously, Liu Ying would not feel surprised at all.

The problem of hard labor is solved, and the last thing left is the specific construction plan.

Thinking of this, Liu Ying got up from the upper seat, picked up a brand new sheepskin scroll from the table in front of her, and handed it to Yang Chengyan.

"The construction of the Zhengguo Canal should be based on the wishes of the Shaofu, and should not be meddled at all."

"However, this is a strategy for the lonely, so I present it to the Shaofu face to face to ask whether it is feasible or not?"

Liu Ying speaks skillfully, the brand new sheepskin scroll has also been spread out by Yang Chengyan, and placed on the wooden case in front of him.

Then, Yang Chengyan saw the parchment scroll...
Only six lines?
To be precise, there are six lines of different thicknesses that are parallel to each other.

Looking at the "construction drawing" that she drew that resembled a runway, Liu Ying couldn't help but blushed a little, stepped forward, and pointed at the middle of the parchment.

Following Liu Ying's fingers, he leaned his upper body forward, and after looking carefully, Yang Chengyan discovered that in the center of the six parallel lines, there were several fingernail-sized fonts, which seemed to be used as marks.

"The bottom of the canal... the top of the canal..."

Muttering to himself, a look of understanding quietly appeared on Yang Chengyan's face.

Yang Chengyan raised his head slightly, looked at Liu Ying with uncertainty on his face, and pointed to the two outermost lines among the six lines.

"The meaning of the family, this second line is the top of the canal?"

Seeing Liu Ying nodded, Yang Chengyan pointed to the second straight line from the top and the second straight line from the bottom.

"This is the bottom of the canal?"

After Liu Ying nodded again, Yang Chengyan looked at the two innermost lines, with a little doubt on his face.

Seeing this, Liu Ying couldn't help but leaned over with a chuckle, and pointed to a mark between the two lines.

Seeing that the mark was taken out, Yang Chengyan finally had some clarity in his eyes.

"Nine feet wide..."

Nine feet, isn't it the bottom width that Zheng Guoqu should have?
Yang Chengyan raised his head thoughtfully, and looked at Liu Ying with some uncertainty.

"What do you mean by family, the bottom of the canal is not completely dug in the section of the river that is a hundred and ten miles downstream, but only nine zhang in the canal?"

Hearing this, Liu Ying finally nodded with a smile.

"The width of the bottom of the Zhengguo Canal was supposed to be nine feet, but now it has been widened to fifteen or six feet by the local people."

"If the width of fifteen or six feet is fully dug, the sand dug from the bottom of the canal will have to be thrown from the canal to the outside of the canal, which is a waste of manpower."

"However, if only nine feet of the canal are dug, the excavated soil should not go out of the canal, but fill in the remaining six or seven feet on the side of the canal?"

"—One, you can save the bottom of the six or seven feet wide canal;"

"Both, the soil excavated from the bottom of the canal does not have to be thrown out of the canal, and it can save labor and labor, so that the work here can be completed quickly."

As she said that, Liu Ying couldn't help but Wen Er smiled.

"After the winter solstice, the width of the Zhengguo Canal should have been reduced by filling it with soil. Today, only nine feet of soil in the canal is dug to fill the six or seven feet on the side of the canal. It will also save a lot of effort to reduce the width of the Zhengguo Canal in the future."

Hearing Liu Ying's description, Yang Chengyan pondered for a while, and restored the picture described by Liu Ying in his mind.

Leave the canal land fifteen feet wide from north to south, and leave the three feet to the north and south three feet alone. Only dig the nine feet in the middle, that is, the nine feet that will become the actual bottom of the Zhengguo Canal in the future.

And from this nine-foot-wide canal, dig down to a depth ranging from one foot to one foot three feet, and throw the excavated soil directly to the sides, that is, the bottom of the three-foot-north and south-three-foot canals that are not dug.

In this way, the ditch that was supposed to be fifteen feet wide was reduced to nine feet wide; the silt that was originally to be transported from the bottom of the canal also became the soil material for filling the side of the canal to widen the width... ·

"If it wasn't for the knowledge that the family has never been in charge of water conservancy affairs, I can't help but think that the person in front of you at this time is a world-renowned water engineer!"

Seeing Yang Chengyan expressing this praise with joy, Liu Ying just smiled shyly and nodded to Yang Chengyan.

"Even the Shaofu thinks that there is nothing wrong with this method, so let's act accordingly."

　I have not been in good health for the past few days, my mind is dizzy, and my code words are slow, please bear with me...
　　I remember what I owe, and I must pay it off as soon as possible.

　　(manually clasped fists)
　　
　
(End of this chapter)