Zhang Beichen also knew about the situation in Baiyang County. These days, he checked the information of the county, and he knew that Baiyang County was a barren land before.

It turns out that the population is not large, and people can still live by relying on Longyan Spring. However, as the Qin State lost more and more land, and the number of refugees increased, the number of people who migrated here also increased, and the Longyan Spring was not enough for them to fetch water.

Zhang Beichen conducted a small survey of the geographical environment here. According to previous data, Baiyang County also had a river on the ground hundreds of years ago, but it dried up later.

However, Zhang Beichen deduced from various sources that there should be enough groundwater underground in Baiyang County. But the geological structure here is special, the ground is mostly rocky, it is difficult to drill wells, and the depth is not enough to find groundwater.

As a science student with some experience in simulation, Zhang Beichen already had an idea in mind.

He said to the crowd: "Since this county is the county magistrate of Baiyang County, these problems will naturally be resolved by this county. But if you break the law, you must also deal with it in accordance with the law."

Hearing his words, Yu Yong said: "Deal with it? Can you handle it? Mr. Zhang, if you can solve the problem of drinking water for the people in Baiyang County, let us not have to watch the sky for food and fight each other with our lives every year. I, Yu Yong, don't need to be executed , I will do it myself and rectify myself!"

"Yes!" The other felons also said together, "If you can let everyone use water, what if we are punished? At least our future generations will not have to kill others for a bucket of water like us!"

"Okay!" Zhang Beichen looked at the crowd and said, "Today, the county will convince you all!"

"Ada, bring the tools from the county government over here, and dig wells to get water!"

"Yes!" Ah Da and the others went back to the county government office to move things.

But Bai Liangpu and the others were laughing secretly.

"This kid is really an idiot." Bai Liangju laughed, "If it's so easy to dig a well in this area, will they still fight for water?"

"He has nowhere to go!" Bai Liangpu looked proud, "He neither dares to kill people to rectify the law, nor let others break the law, so he can only take a gamble. Unfortunately, even if he digs here for three days and three nights, he still can't dig out water. Come!"

"My lord, do we really need to dig a well to get water?" Liu Wen expressed a little hesitation. Judging from his experience, this kind of thing is futile.

"Of course!" Zhang Beichen ordered, "Master Liu, take me to find the ancient river channel in Baiyang County."

"This... okay." Liu Wen had no choice but to lead him the way.

The prisoners and the common people all followed him to see what Zhang Beichen could do.

Not long after, Ah Da and the others brought the tools.

Bai Liangju looked over and saw the guards dragging a cart, on which there were hollow bamboo tubes of similar caliber, with iron cones, shovels and some metal parts on them.

"I thought the county magistrate had some means to dig a well with just these things?" Bai Liangju laughed, "What is the bamboo tube used for? Is it used as firewood?"

Everyone is also puzzled.

Zhang Beichen is still choosing a site, and he specially invited a few old people who are good at digging wells to help them look at the site.

A group of people came to an ancient river channel, which has been dry for more than a hundred years, and the original river channel has long been turned into a wasteland.

An old man said: "My lord, I heard from my grandfather that there used to be a river here. The terrain here is low-lying and suitable for drilling wells."

Liu Wen quickly reminded Zhang Beichen: "My lord, the county once sent people to dig a well here. It took several months to dig a full 200 feet, but no water came out! There are too many gravels below, and the deeper you dig, the harder it is to dig. Look, there is the pit for digging a well!"

One foot in Qin is about 23 centimeters, and two hundred feet is about 46 meters!

Zhang Beichen went over and saw that there was indeed a big hole. At the bottom of the pit, gravel and dirt are mixed together.

Seeing this appearance, Ah Da and the others were also in a dilemma, and said to Zhang Beichen: "My lord, this place is not suitable for digging a well. It has been dug so deep and no water has come out. I guess it would be a waste of time to dig again."

"I'll go down and have a look." Zhang Beichen asked someone to let him down with a rope. He touched the cave wall and found that the cave wall was indeed wetter than the top.

He went up again and walked a few miles around.

Everyone was waiting for him, Yang Shan asked impatiently: "Zhang Beichen, can you do it? If not, just let him go, don't waste everyone's time here!"

Zhang Beichen glanced at him, but didn't reply. He observed the surrounding environment, and at this moment he already knew that there was water in the ground!

Because when he went down to the abandoned well, he noticed that the underground temperature was lower and the cave wall was wetter than the ground. The surrounding trees and vegetation are obviously denser than other places.

Some plants have well-developed root systems, and they can absorb water at a deeper level, which means that there is water in the ground.

As for why it was not drilled, there is only one reason, and that is that the drilling technology here is not developed enough, so the depth of the well cannot be drilled to a depth of 50 meters.

In his previous time and space, even when drilling wells in rural areas, they often drilled two to three hundred meters deep. In this era, it is very difficult to dig hundreds of meters deep by relying on manpower!

"Get ready to dig a well! Just continue digging along this abandoned well!" Zhang Beichen ordered.

"Yes!" The guards were all ready, but Zhang Beichen said to Che Yang: "General, please ask your soldiers to help. They have deep cultivation and faster speed!"

"No problem!" Che Yang asked his soldiers to help dig the well. Their strength and endurance were stronger than the guards.

The soldiers took turns to fight, and soon the depth of the well was increased by tens of meters.

After an hour passed, the people at the scene were impatient, and there was still no water coming out from the bottom, and the soldiers had been consuming their spiritual power, and they couldn't take it anymore.

"Master Zhang, according to your method, there may not be any water for another month of digging. Do you want us to wait here for a month?" Bai Liangpu asked.

"What are you in a hurry for?" Zhang Beichen glanced at the depth and found that it was almost enough, so he ordered people to put down the prepared things, and at the same time install something like a large wheel with a metal cone head tied with an iron cable.

"What is this?" Everyone had never seen this thing before, and looked puzzled.

"You step on this wheel and dig the ground with iron cones!" Zhang Beichen ordered.

Everyone said logically that the iron cone hit the ground, and a hole the size of a bowl was made in the bottom of the cave, and even rocks could be easily cut through!

Liu Wen was surprised: "This is much more labor-saving than manpower!"

That hard rock was crushed lightly!

They didn't understand that this was actually a lever linkage device in disguise. After connecting the iron cone, the soldiers pedaled to turn the wheel, driving the iron cone to form a human impact drill!

This is not Zhang Beichen's original creation, but a deep well digging technique created by people in his original time and space more than a thousand years later.

The digging of wells in the Seven Kingdoms is all shallow wells, which is time-consuming and labor-intensive. Think about it, if you have to dig 200 meters, that's about 870 feet!

If this is dug by manpower, when will it be dug? Even a martial artist with cultivation base would be exhausted to death!

Moreover, digging shallow wells requires a larger area, giving people room to stand, dig and move mud and rocks.

To dig a deep well, it is enough to dig a hole the size of a bowl.

"My lord, are you digging a well? Just such a small hole? How deep can you dig? And how do you get out the mud and rocks inside? Even if the water is dug out, how will the water come up? Are you playing me?" Yu Yu Yong and the others couldn't understand and questioned.

"In two hours, the water will surely come out!" Zhang Beichen said firmly.

He naturally has solutions to these problems. After digging to a certain depth, a bamboo tube is put into the bamboo tube, and a one-way valve is placed on the bamboo tube, which can use the air pressure to pump out the mud and rocks inside, and then put the drill bit in, go in and drill, and cycle like this until the water comes out.

This is the deep well drilling technology. In the agricultural era, this technology can drill hundreds of meters of deep wells. It is called the first version of oil drilling technology.

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