What Jian Chen and the leaders said was very simple, but it was much more troublesome to actually operate, and he didn't have much bottom in his heart. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

In the overall concept, the island plays the role of diversion, using the difference between the direction of the upper and lower fluids of the water flow to control the water flow. Ideally, during times of drought, most of the water goes from the deeper river channel near the side of Xia Cheng; When the weather is flooded, most of the water goes from the shallow river channel on the south bank of the Caohe River.

The aqueduct on the north bank also requires the construction of water spouts with stones and earth baskets to ensure that water flows directly into the aqueduct during droughts.

The flood channel on the south bank of the Cao River also needs to be prepared in advance, Chen Jian has already gone there to check, the most difficult to dig is a small stone mound, but summer is coming soon, when the time comes, prepare a few thousand catties of black powder, just blow it up there.

The water from the diversion canal flows into the depression to form a small artificial lake to store water, ensuring that the level of the artificial lake is as high as the river level, and the dikes are repaired around it, and the water level is higher than the surrounding farmland by using the drop.

The level of the canal used for irrigation is also slightly higher than that of the field under normal conditions, and it is not possible to dig a pit directly, but to dig a shallow pit and pile the soil on both sides to form a concave channel.

The overall plan doesn't seem to be troublesome, but it's terrible to really implement, Chen Jian was planning this matter from the first time he saw Luodao to the time he guided the people to plant, but the most important difficulty he solved a few days ago.

The biggest difficulty is not the human and organizational skills, but the alignment tools and the level tools!

The height difference of the canal is the top priority of the whole project, and the most difficult water distribution problem in theory is solved by the sky because of the existence of Luo Island.

What can now be determined with a simple square ruler tool is that there is a drop of about two meters between the aqueduct and the artificial lake, but other than that, it feels relatively flat.

But at a distance of 1,000 meters, the eyes are no longer working, and a slight error will cause the canal to fail to flow.

It's like a math problem, and the only condition that can be determined now is the height difference between the grass river and the depression plane, and the rest has to be solved little by little.

After the only one was determined, the spring ploughing in Xia Cheng was basically completed, and before the civilians, slaves and wild settlements in Xia Cheng had time to rest, the various clans re-engaged in the excavation of the canals, and even the new army stopped training and joined in the excavation.

In addition to the garrison left behind in Yangguan, more than 5,000 men, women and slaves were concentrated between the grass river and the depression.

The high slope of the river bank did not move for the time being, and it took four days to dig an artificial canal more than 180 meters long and six meters wide, and then surrounded the depression with a layer of rammed earth to form a simple embankment.

The place where the aqueduct connects to the grass river is not dug directly, but two sluice gates are dug about 10 meters away from the natural embankment, and a small bridge is made of wood and rammed earth on the top of the sluice gates, and the overall intake resembles a large water pipe.

Below the gate was a ditch deeper than the river, and inside was a large pine tree surrounded by three people, coated with pine resin, carved into a sloping convex shape.

The place where the water is diverted into the canal is narrow, just concave, but very high. When the water is not large, the river can flow into the canal through a narrow concave in a wide ditch.

Once the water is generated, or the height of the river exceeds the depression embankment, the pine will float up, impulsed by the water, and get stuck on the groove of the inlet to close the intake, and only when the water level is extremely high, because the pine floats on the water surface and automatically adjusts according to the height of the water surface.

In this way, when the flood is carried out, the pine wood plugs the gap, and the tribesmen can easily block the embankment behind it with stones, otherwise it is impossible to block the breach of the embankment with the current tools.

The simple buoyancy principle sluice gate is the first semi-automated facility in Xia City, the clansmen don't understand why, just do it according to Chen Jian's requirements, the sky is not raining, the water is shallow in spring, and the clansmen still can't understand what this thick pine floating in the ditch does.

After the simple automatic buoyancy sluice gate was completed, Chen Jian took a few leaders to cut the hemp rope that helped the silk flower and did a vulgar cutting ceremony, and then dozens of shovels flew together, and the water of the grass river flowed along the dug canal to the low-lying land a hundred steps away.

While waiting for the artificial lake to fill up, Chen Jian first led his people to dig a deep canal to make sure that the water could flow in.

When the lake is not fully filled, the embankment is opened, and the 100-step canal is filled with water, and then the embankment is blocked, and when the flow is stable, the water surface of the 100-step water can be considered completely straight.

Tie a wooden stick to one end of the canal, tie a twine close to the water surface, Yu Qian ran to the other end, inserted a wooden stick, and straightened the twine, the height from the water surface is the same as Chen Jian's, this line is the horizontal line.

Using this line as a benchmark, the height of the rammed earth layer at the bottom of the aqueduct is about a foot above the ground after the lake is filled.

The planned irrigation canal is about 5,000 steps each, with 2,500 steps on each side. A drop of one foot every 500 steps, so that the water can flow normally.

One hundred steps and one measurement, relying on the natural level of the water flow and the height difference of the wooden stick after straightening the twine as a reference, the normal flow of water can basically be guaranteed.

When things happened, the people felt that the ground was flat, and they felt that they only needed to dig out the canal according to the requirements to make the water flow on its own.

But after measuring it, they found that the ground looked flat, but in fact it was uneven and uneven, and even if they didn't understand it, they also knew the reason why the water flowed down, and looked at the sticks and twine, and said in their hearts that if they took the surface as a reference, I am afraid that the water would not flow for 500 steps.

The aqueduct used for reference does not need to be wide, and the distance of 100 steps can also be measured by looking at the mountain with a log floating on the water, using a three-point and one-line method.

Chen Jian led the older children of the school to dig a height measuring canal along the place where the canal was planned to be dug, and after bringing in the water, he set up a wooden stick every 100 steps to stretch the twine.

The seemingly flat ground has a huge drop over a distance of five thousand meters, and in some places you may need to dig about two steps down, while in others you need to dig one step above the surface.

The onlooker looked at the dense wooden sticks and yardsticks on the ground, and said in his heart that if Echeng wanted to build such a project, it would be very difficult...... After thinking for a moment, he shook his head with a smile, not that it was difficult, but that it was impossible at all.

He was confident that his mother's arithmetic was only on par with Ji Xia, but it was much worse in terms of arithmetic.

He knew that he had a lot to learn, but he never thought that a few pieces of wood and a few balls of twine would have such an effect.

After Chen Jian finished measuring it, Echeng felt that he understood, that is, relying on the plane of water to complete, when Echeng was building a house, he would also use a long sink to measure the level, the principle was very simple, but he felt that he would definitely not think of this.

After the most difficult place was over, the anxiously waiting tribes finally waited for their task, the first canal was divided according to the population of the clan, and Chen Jian commanded all the wild people to be in charge of the longest section.

On average, each person is responsible for only one step of distance, and less than two steps if you count men and slaves, which is already the easiest place.

But the simplest work also had value in use, and Chen Jian divided the first group of slaves with a similar language into six groups, each group of sixty people, twenty-five men and thirty-five women, because the first batch of female slaves outnumbered men.

Six sections with basically the same amount of work were selected and distributed to these slaves, telling them very clearly that whoever completed these six groups first could get rid of the status of slaves and become subordinate farmers.

After becoming subordinate peasants, they did not have a surname, only a name, but they could be regarded as people rather than things, and they were directly governed by the city, and they were no longer forced to labor, but they were tied to the land by using the land, and they gained nominal freedom.

The sixty people who became subordinate farmers could divide 500 acres of land from the public property and plant them for cultivation, and they could also borrow the ploughing cattle from the city, go to the fang market to buy goods, and even build their own houses outside the city.

However, half of the income from these lands went to the public property of the towns, and they were also subject to hard labor.

Even these harsh conditions made these men who had been slaves for a year full of energy, at least stronger than being beaten and whipped every day, at least lying on the grass and basking in the sun when they were tired.

The motivation for freedom and land is immense, and these slaves know that opportunity is fleeting, and no one knows when they will wait until they miss this time.

While the people of the various clans rested at night, the slaves lit bonfires and carried away the earth on their backs with their tired and numb hands and worn shoulders, or tamped the foundations.

Most of the slaves slept only two or three hours a day, and after two days four died of exhaustion, but those who survived did not mourn or weep, turning their lives into a blazing candle that burst out the last spark to illuminate their future in the boundless darkness.

The fastest group dug the hundred-step ditch in only four days, and the remaining five groups were about the same.

When Jian passed the examination, the five groups of slaves lay on the ground and wept, banging their heads against the solid ground, begging Jian Chen to give them another chance.

The victorious slaves laughed loudly, especially after their meal had changed from the slave's husked corn to good corn, and even a small piece of pickles with lard, and they felt that the inhuman exhaustion and blood blisters on their hands had been worth it for the past few days.

Imprisoning the originally free people, and then returning to them what originally belonged to them in the form of alms, there will always be a mountain to call for gratitude, and the slaves have probably forgotten that if it weren't for Jian Chen, they would still be happy clan members.

After Jian Chen found the members of the council during the break and asked the slaves to bow down and swear an oath to show that they had a new identity that they could call human, the fifty-nine slaves bit their fingers and swore that they would never betray the city in their lives.

Jian Chen also took them to see a piece of land of 500 acres, and told them that half of the harvest on this land was theirs.

In order to encourage them to reclaim the land, Chen Jian promised that in addition to the 500 acres of land, they could go outside to continue the reclamation, and the newly reclaimed land was also owned by the public property of the city, but they could still get half of the harvest, and for every additional acre of land, they would get three small shells, that is, 30 catties of grain, as a one-time reward.

Chen Jian has always planned to naturalize this group of slaves to supplement the population of the tribe, and strive to naturalize the wild people into the citizens of the city when there is an age crisis in the urban population in about five years, and then naturalize these subordinate farmers into wild people, capture slaves through war, and quickly expand the light and strong population in a five-year cycle.

The power of example is endless, even for such deformed examples. After the fifty-nine people obtained the land, the second phase of the project was carried out as scheduled, and by the same means and methods, these hopeful slaves burst out with four times the strength of those hopeless slaves, and with their efficiency and speed all the people of Xia City were dumbfounded. (To be continued.) )