Li Hui loudly ordered everyone to fill the pipe with water. The other end of the pipe in the center of the lake has been completely sealed, and only the lake shore is filled with lake water. Buckets of water are poured in, and Li Hui patrols along the moso bamboo pipe to inspect
Whether there is any leakage is the key to success or failure. Fortunately, everything is normal and the pipe seal is intact.
The pipe was thick and long, and two oxcarts pulled it back and forth seven or eight times. Hundreds of barrels of lake water were poured into the pipe before the long pipe was filled. The leather pipe filled with lake water swelled, more like
A big snake hovered on the ground.
Li Hui ordered people to stuff a several-foot-long bamboo pole tied with broken fur into the outlet of the leather pipe that was already overflowing with water, and tied it tightly together with the leather pipe. Then he asked a dozen men to carefully fill the pipe with water.
The water pipe is lifted up and quickly descends along the slope of the lake embankment into the ditch outside the embankment.
"Ready. Three, two, one!" Li Hui shouted as he shook a bamboo pole tied with a striking piece of clothing on the lake embankment.
After people on the side of the lake saw the shaking clothes, they immediately pulled out the underwater wooden plug blocking the water inlet of the bamboo tube. At the same time, in the ditch outside the lake embankment, the tied hemp rope was quickly untied. Five or six strong men
He grabbed one end of the fur-wrapped bamboo pole inserted into the leather tube and pulled it out.
It was like a huge piston being pulled out, making a loud banging sound. A huge suction force was generated, and the water in the pipe rushed out quickly, flowing out with a splash.
Everyone held their breath and stared at the water rushing out of the outlet of the leather tube, with expressions of disbelief.
Li Hui looked extremely nervous. He knew that this simple set of water channels built based on the siphon principle of the connector was extremely fragile. The water flowing out at the beginning was the water injected into the pipe. Only after waiting for a while would he know whether it was successful or not.
success.
He stared closely at the leather pipes in the shallow trenches dug on the lake embankment, fearing that they would collapse. If the pipes were not sealed enough and air leaked in one place, the balance of the connector principle under this siphon effect would be lost.
will be broken and the water flow will be interrupted. This is why Li Hui constantly verified the air tightness of the pipeline during the initial production.
In addition, the highest supported slope that produces a siphon state is a little more than ten meters. That is to say, the height of the embankment that the water flows over cannot exceed the height of the water surface in the center of the lake by ten meters, otherwise the siphon effect will not occur. Previous measurements are all estimates.
, my estimate is that the embankment is about nine meters above the water surface. But there will inevitably be errors.
Although he ordered people to dig out the topsoil on the lake embankment and lowered the water delivery height by half a meter, Li Hui was still not completely sure.
These various conditional restrictions are the guarantee for the operation of this fragile system. Therefore, during the first tea time, although everyone around him was cheering and extremely happy because of the continuous gush of water, Li Hui still
He stared at the leather pipe nervously, not daring to move his eyes away.
It wasn't until he saw that the water flow continued for a long enough time that Li Hui breathed a sigh of relief and knew that he had succeeded.
This is actually the simplest physical principle. The siphon effect produced by the interaction between atmospheric pressure and water molecules can be verified in the laboratory with a leather tube and a glass of water. But in this era, creating a two- to three-mile-long
This siphon sealing system is extremely difficult.
Fortunately, the Gu family has enough manpower and supplies. The moso bamboos are thick and thick bamboos with good sealing properties. The cowhide is also in good condition. The women's stitches are fine and the required rosin, grease and other materials are sufficient, so they can perform better.
The sealing effect makes all this successful.
Although the rushing water was not large, it was indeed flowing water. Soon the water began to flow in the ditch, and slowly began to flow along the ditch into the dry fields below.
What this means is self-evident.
Gu Qian and his son, Han Yong and others could not close their mouths for a long time, their faces were full of astonishment, and their hearts were filled with joy and disbelief.
"The water actually flows to higher places. I have never seen anything like this before." Gu Qian said to himself in surprise.
…
The water rushing out from behind the pipe made everyone cheer and rejoice. This was the first time in more than 20 days that water entered the paddy fields of East Lake Manor.
Previously, after the water surface of the lake fell to the water release sluice, there was no water to irrigate the seedlings. Seeing the fields drying up and cracking day by day, and the seedlings turning yellow day by day, everyone was helpless. Now, the water at the bottom of the lake can finally be introduced into the ditch through this channel.
It is naturally exciting and ecstatic.
You know, that is the livelihood of many people for a year. Although the tenants earn little, at least they will not go hungry if they have a harvest.
All the people present who participated in this matter may have complained in their hearts because of the heat and hard work, and felt that this matter was a bit unreliable and that this young man was fooling around. But now, their fatigue and heat have been swept away, and they look at Li Hui with admiration.
.
With the help of a servant, Gu Qian personally went to the ditch below. Looking at the gurgling water, Gu Qian was in a good mood and nodded repeatedly.
"I didn't expect that he actually did it. This kid has some abilities, but I underestimated him. How he did it is a bit puzzling." Gu Xun said with a smile.
Gu Qian sighed: "Yes, it's unbelievable. It can be seen that people should not be judged by their appearance. I have to ask him how he did it."
Gu Qian and others returned to the lake embankment. Li Hui was instructing several tenants to take care of the pipes in time and pay attention to blocking the silt blades at the water inlet. Although a puddle was dug at the water inlet and surrounded by bamboo strips,
Form a circle to block the accumulation of branches, water plants and other debris in the water, but it still needs to be cleaned.
"Little Master of the Li family, Dong Weng invites you to come over and talk." Han Yong came over with a smile on his face and a very kind attitude.
Li Hui followed Han Yong to the awning under the shade of the tree. Gu Qian sat on the horse and smiled and said, "Boy, you did it."
Li Hui cupped his hands and smiled and said: "Fortunately, I did not disgrace my life. I don't want to be accused of teasing Dong Weng and lose my life."
Gu Qian knew that Li Hui was trying to poke fun at him, so he said in a deep voice: "Young man, don't be sharp-tongued. After all, seeing is believing. How can I believe you until I see it with my own eyes?"
Li Hui nodded and said: "Exactly."
Gu Qian said: "What happened today really opened my eyes. You can make the water flow to higher places and flow out across the lake embankment. It is really amazing. Tell me, how did you do it?"
Li Hui smiled and said: "It's not a magic method anyway. It's just a normal natural principle, but people haven't noticed it."
Gu Qian said: "Oh? Tell me. I want to hear it, and we all want to know how it is done."
Li Hui raised his head and looked at the people standing behind Gu Qian. Gu Xun and others were looking at him expectantly, with curiosity on their faces. The two beautiful girls were also looking at him with wide eyes. Especially that one.
Zhang Tongyun stared at her with a pair of beautiful eyes, full of curiosity. Her little mouth was red and pouted, as if she was eager to ask.
Li Hui originally didn't want to explain more. There wasn't much point in explaining the principles to them. But when he saw Zhang Tongyun's expression, he suddenly changed his mind. Being able to show off himself in front of a beautiful woman seemed to be an irresistible temptation.
"Please give me a bowl of water." Li Hui said.
"Yes, you must be tired and thirsty. Serve tea to the young man from the Li family." Gu Qian said with a smile.
Han Yong wanted to pour tea, but Zhang Tongyun poured a cup of tea first. Because she wanted to know how all this was done, she did it casually. After pouring the tea, she realized something was wrong.
However, Li Hui shook his head and said: "I don't want tea. What I want is a bowl of water. I have drank a few ladles of well water just now, and I am not thirsty. I just want to explain the principle of water flow to Dong Weng."
Zhang Tongyun originally felt that she was serving tea inappropriately, but after hearing these words, her face suddenly turned red. Fortunately, no one noticed her.
Gu Qian chuckled and said, "That's a misunderstanding. Here's a bowl of water."
A bowl of water was placed on the table. Li Hui plucked a piece of wild wheat from the ground, cut off the head and tail, leaving a section of straw in the middle, and bent it into an arc. He put one end of the straw into the bowl and the other end.
Set it up outside.
Everyone didn't know what was going on. They saw Li Hui turning his head to the outlet of the straw and taking a sip. A stream of clear water flowed out along the straw, dripping and dripping non-stop.
"Please see, the edge of the bowl is like this lake embankment. Although it is higher than the water in the bowl, the water can still flow out along the straw. This is the reason why water is diverted into the fields today." Li Hui said.
Gu Qian stared at the flowing water from the straw, nodded slowly and said, "I see. How do you know this?"
Li Huidao: "I like to think wildly. I accidentally discovered this phenomenon and thought it could be applied. That's all. To be honest, I'm not sure I can succeed today. After all, this pipeline is too long and may not work. But fortunately everything went well.
.”
Gu Qian didn't say anything, but he was very impressed in his heart. This young man can get inspiration from ordinary phenomena and apply it in practice. Only with this kind of thought, few people can do it. It can be seen that although this person is young,
, but he is a thoughtful person.,
Gu Qian stood up and walked slowly towards the edge of the lake embankment. He turned his head and listened to the sound of running water under the lake embankment, and sighed: "What a beautiful sound. It is an ingenious idea that the lake water can be introduced into the fields for irrigation in this way."
"
Gu Xun nodded and said, "Yes. It's a pity that the water flow is too small. I don't know how long it will take to irrigate these ten thousand acres of fertile land."
Gu Qian turned to look at Li Hui and said, "What do you think? Can we build more waterways to divert water into the fields?"
Li Huidao: "Of course, as long as the materials and manpower are in place, several water diversion pipelines can be built to speed up the diversion of water into the fields. But..."
Li Hui pondered.
"how?"
"Dong Weng, I'll tell you the truth, I'm afraid the water in the center of the lake cannot irrigate ten thousand acres of paddy fields. The area of the fields is too large and the water volume is insufficient." Li Hui said.
"It's a joke. There is such a large lake in the middle of the lake. How can it be insufficient? The water in the middle of the lake is about ten feet deep. It is definitely enough." Han Yong said.
"Mr. Han, there are only a few feet of water in the lake. I have made calculations. If the water level in the center of the lake drops another three or four feet, this water diversion method will not work. I don't need to explain the reason, and you may not understand it if I tell you.
.In other words, the water we can introduce into the fields is limited. No matter how many water diversion channels are built, it cannot solve the problem of insufficient water. We can only let the seedlings get water as soon as possible." Li Huidao.