Three Kingdoms: I rely on system loopholes to survive

Guangxin is different from the plains. It was already hot and humid in mid-April, and the days were getting longer. Liu Bei sometimes dealt with official documents until the hour of Xu, but looking at the sunlight outside the hall, he felt as if it was still noon.

A few days ago, Zhang Fei sent someone to deliver a letter back. When Liu Bei unfolded it, he found that the wording in the letter was no different from usual. He was relieved at first. Then he saw that there were a few sentences in the tone of his second brother, saying that since his third brother came to Jiaozhi, he has behaved quite calmly and has been much more restrained in drinking. He couldn't help but smile.

Just by seeing this, Liu Bei already felt that the trip of his two younger brothers was worthwhile. Then he saw that his second younger brother had earlier fought against the Fan brothers, and in one battle he killed the leaders of the rebellion, Fan Miao. The remaining Fan Xin fled with the remnants, and joined forces with the Nanman who were plundering in Jiaozhi, occupying Wugong County and confronting Shi Xie.

Liu Bei took out the map and looked at it carefully. This Wugong City should belong to Jiuzhen County. No wonder Shi Xie wanted to ask him for someone to lead the troops. However, judging from Shi Xie's words, it seemed that he was intentionally blurring the ownership of Jiuzhen County. Liu Bei led Jiuzhen and Cangwu counties, and the invasion of Wugong by Fan Xin and Nanman should have been Liu Bei's internal affairs.

Shi Xie's behavior seemed to have turned the tables.

While Liu Bei was thinking, he picked up his pen to write back to his two brothers. Naturally, he began with some caring instructions. Just as he was about to continue writing, he faintly heard Guo Yuan's voice, so he put down his pen and took the initiative to go out to greet him.

"Why are you here at this time, Zini? The sun is scorching outside, come in and sit down, there is well water in the cup, it can help you cool down."

Liu Bei carefully pushed the kettle to Guo Yuan's side.

Guo Yuan had wiped the sweat off his face with his sleeves before entering the room, but he still felt warm: "Thank you, my lord."

"My Lord, I have come here to discuss important matters. I heard from the old officials in the county that floods frequently occur in July and August. The people often suffer terribly, their mulberry fields are flooded, and their livelihoods are lost. After careful consideration, I think that what Bo Heng said about building a sluice to regulate the water flow is a long-term solution."

Liu Bei frowned upon hearing this and said in deep thought, "What Zini said is absolutely right. Without water there will be drought, and too much water will cause flooding. Controlling the flow of water is indeed the fundamental method. But building a sluice gate is not a one-day job. I have already given the task to Bo Heng, but Bo Heng seems to be afraid of hurting the people and labor, and has not made a decision until today."

Guo Yuan drank three glasses of water in a row before his throat was slightly quenched. He said hurriedly, "Bo Heng has a final decision on this matter. This is the final blueprint that Bo Heng decided on. Bo Heng went to the mountains to estimate the river level this morning and he can't come back yet."

Guo Yuan took out the cloth from his arms and spread it out on the table.

Liu Bei had never built a sluice gate before, although he had built ditches and dams when he was in the plains, but they were different from large-scale facilities like sluice gates.

Only charcoal and brushes were used on the cloth. The lines were clean, and the name and size of each place were marked. It was so detailed that Liu Bei was a little surprised. After all, in his opinion, such a picture would take at least a year and a half to draw.

Zhong Ping used charcoal to outline the general direction of the river and the terrain contours, and then carefully depicted the location and shape of the lock chamber.

The lock chamber is the core part of the sluice and needs to withstand huge water pressure and impact force. Zhong Ping initially wanted to design it into an arch shape, but when he thought about the geography questions he had done before, it seemed that they all drew rectangular lock chambers. In order to be safe, Zhong Ping thought it would be better not to innovate at will.

"Bo Heng marked this place as 'wood, stone, mortar, and pig iron'... The first two are easy to obtain, but I'm afraid iron ore is hard to find?"

Liu Bei frowned slightly and was already thinking about how to get enough pig iron.

Guo Yuan then took out a piece of cloth from his bosom and said, "Bo Heng has been busy traveling for water conservancy work for the past few months. He studied the geography and county records and found that there is a mountain range about 60 miles outside Guangxin City. There are many wild bitter hemps in the mountains. The mountain is dark in color and the stones are like paper. On the gentle slope of the north wing, there are strips of jasper embedded in the stones. Therefore, it is speculated that this is an iron mine."

"Oh?"

Liu Bei immediately stood up, took the cloth and examined it, his heart was filled with uncontrollable joy. In front of Guo Yuan and others, Liu Bei rarely restrained his emotions, and often treated them with sincerity, so this joy was also revealed on his face, and his tone was both excited and emotional: "If there really is an iron ore, it will really solve our urgent needs."

"I have never heard of this method of finding minerals before. Boheng is so young, but he has such a skill. It is really hard to find one in the world. I am so lucky to have Boheng!"

Guo Yuan's eyes were also full of pride: "I also heard it for the first time. Bo Heng once said, 'There are onions on the mountain, and silver below; there are scallions on the mountain, and gold below; there are ginger on the mountain, and copper and tin below. All things depend on each other, and all have their own laws of life and death, and their own principles of operation.' Although I don't know where he got this knowledge from, I think he studied it for the purpose of discussing his 'Neo-Confucianism' in the book."

After listening to Zhong Ping's "reasoning", Liu Bei actually became somewhat interested in it. However, at the moment he was still concerned about the sluice gate. He secretly kept the matter in mind and planned to discuss it with Zhong Ping one day.

"What formula is this?" Guo Yuan looked in the direction Liu Bei pointed, and it turned out that Zhong Ping had left a formula for calculating the size and weight of the gate on the pattern of the gate.

Zhong Ping suffered from insomnia while designing the gate.

After all, the gates needed to be flexible to regulate the water flow, and they also needed to be strong enough to withstand the impact of floods. He had to carefully ensure that they could protect the river steadily when floods came, but the problem was that Zhong Ping had never been exposed to such professional knowledge as "how to build sluice gates" in his previous life.

For almost half a month, every night Zhong Ping started to feel sorry for himself and regretted why he had learned law in order to avoid mathematics. Now it seems that if he really traveled back to the ancient times, mathematics would be more useful.

During the day, in addition to checking the location of the stone mines in the mountains, Zhongping kept measuring the changes in water levels upstream and downstream, and comparing them with the county annals and the memories of the elders in the surrounding villages.

Perhaps it was because I had been digging deep into the memories to recall the little geographical knowledge I could use, or perhaps it was because when I first came here, I was memorizing the novels I had read and the questions I had done in my previous life every day.

Zhong Ping Huanzhen recalled two important calculation formulas, one is the flood volume Q, and the other is the flow coefficient C.

In order to ensure that his memory was correct, Zhong Ping specially made an estuary model with mud, sand and wooden boards to try it out, and then he conducted a miniature model experiment based on the local river terrain. Finally, after verifying that the formulas were correct, he dared to use these formulas to calculate the size of the gate.

Of course, this calculation formula is not easy to explain. Zhong Ping could only vaguely tell Guo Yuan that he had read the ancient books in the library of the government office when he was the Grand Historian in Chang'an.

Guo Yuan explained to Liu Bei what Zhong Ping said, and Liu Bei then looked at the

Wing wall.

The wing walls are located on both sides of the lock chamber, guiding the water flow and protecting the lock chamber. Zhong Ping also designed the angle and shape of the wing walls according to the flow rate and direction of the river to ensure that the water can flow smoothly through the lock.

In order to prevent the huge energy of the flood from being properly dissipated when it passes through the sluice, which would cause serious damage to the sluice and downstream, Zhongping even designed an energy dissipation pool...

Zhong Ping can confidently say that he never fought so hard when he took the college entrance examination.

Liu Bei looked at the sketch and saw that the sluice was thirty-two zhang long, with seven beams on top, twenty zhang wide and fifty zhang long, with twenty-eight holes for internal and external monitoring, and both a sluice channel and water system. He could not help but be secretly surprised.

The fact that Zhong Ping was able to draw this picture shows that he really worked hard. Liu Bei immediately thought of the fact that Zhong Ping had been eating less but had excess energy during the day. He was startled and decided that after Zhong Ping came back, he would take Zhong Ping to Fan A for treatment.

Liu Bei had this idea ever since Fan A entered Guangxin. Unfortunately, Zhong Ping was basically outside the city during the day. He mentioned it once, but Zhong Ping acted as if he wanted to avoid the topic, which really confused Liu Bei.

"The flood season is approaching, and the sluice gates cannot be repaired for the time being. We still need to dredge the canals and strengthen the embankments within the territory."

Liu Bei carefully rolled up the sluice sketch and put it away, his expression solemn: "Any resources Bo Heng needs to build the sluice can be directly obtained from you and Gongyou. You two must give your full support and don't need to ask me."

"As for the matter of the iron ore... please ask Zini to go with Shuzhi and take a few guards to investigate thoroughly."

"promise!"

Guo Yuan bowed deeply and first thought that after the completion of the sluice gate, Guangxin would no longer have floods. Then he thought of the iron mine outside the city and became very excited. He put away the cloth with records of the iron mine and retreated, ready to find Chen Dao to explore the iron mine according to Liu Bei's arrangement.

(End of this chapter)