Generally speaking, after the winter, the autumn water gradually disappears, but this year is the flood peak meeting, between heaven and earth, the snow in the snow mountains of the west day begins to melt into the river, the disaster of the river is stronger than the river, and the South China Sea Roar Tianshi brings a large amount of rain into the tributaries of the river, so the rain area increases, the rain period is extended, so the water level of all the tributaries rises sharply, and in a short period of time into the river, once it exceeds the riverside, there will be a "rain flood".

For example, it's like a traffic jam on a highway.

"So there needs to be diversion, which I call flood diversion. ”

Yu Zai carefully explained to the great wizard: "This is a matter of no way, if you don't divide the flood, the flood will turn into prostitution, and the south will be gone." ”

The Great Wizard was thinking, but he also knew that there was not much time for him to think about it, this time, the Mossy Field and the large mountain land of Xun Mountain were to be abandoned, and after a fierce ideological struggle, the Great Wizard agreed to Yu Zai's proposal.

After all, he didn't have a very good way to control the water.

"If this flood can be managed, then.... As long as you can do it, there will be no problem for the Xunshan clan to lose a large area of land in the western part of the shallow plains. ”

"So, if this flood diversion is over, will we follow the example of the Central Plains to build a dam?"

The great wizard thinks so, the water barrier method can ensure the safety of both sides of the river, otherwise the flood will not live in this homeland every year, dozens of hundreds of years, or even thousands of years of residence, just give up?

Obviously, a hundred years ago, it was still peaceful.

"It's a celestial phenomenon, and the celestial phenomenon has warmed up. ”

Yu Zai gave an answer.

"The climate in the world is rising, so the mountains and snow in the western sky are shaking, and the source of the great water is unraveled, and more rivers appear, which also causes the water level of the eastern rivers to gradually rise. ”

This is one of the reasons, but it is also the most important reason, that when the climate of the heavens and the earth warms up, the activity of the celestial phenomena will become intense. ”

Yu Zai said to the Great Wizard, "This is the result of my observations..."

This sentence is half-true and half-false, of course, Yu Zai thought of it, and it is indeed possible to use this torrent event to complete the construction of "Chichen Itza", this thing is the big square-headed pyramid of the Mayans, the main purpose of the construction is the observation of celestial phenomena and astronomy, probably completed in more than 400 years AD, of course, it was later reduced to a place to worship and jump the gods.

"If you build a dam, I don't recommend doing it so hastily. ”

Yu Zai gave an answer that stunned the Great Wizard, and all the wizards.

"Why not?"

A wizard in the mossy field asked, very incomprehensible: "The water barrier method in the Central Plains is said to have stabilized the big river for eight or nine years, and the angry current of the big river is far smaller than the big river, so why not build the same embankment, just to defend the shallow plains in the south, why not?"

"We can even build Chongyong Fortress, can't we build a levee? ”

"Because there isn't enough technology. ”

Yu Zai explained: "The long embankment is mostly made of earth and stone, and it is impossible to resist the torrent for a long time, and if the elephant activity becomes more and more intense today, the flood may only be more and not less, and the flood control is a long project, and it is not something that can be completed by the head of our tribal leaders." ”

"There are many ways to use together, the water barrier method should be a way to buy time, not a way to avoid for peace of mind, the more you escape, the more the water will flow to you, if the embankment is not strong enough, then when the embankment bursts, the power of the water will be several times greater than in the river. ”

"Therefore, the embankment should be repaired, but it should not be hastily repaired, and it will cause more damage in the end. ”

"There must be a levee, there must be a dam, there must be a flood distribution area, and there must be a water gate. ”

The wizards looked at each other, and one asked, "That means that the water barrier method is really useful." ”

Yu Zai nodded: "Of course it is useful, even if it is to block the water directly, it is useful, but it depends on how it is used, the blockage, it should be used in Daze, the edge of the big lake, in those places where the water flow is easy to overflow, build dams, and raise the water level that the lake can carry....."

"The temper of the big river is better than that of the big river, and the torrent is mostly rain and flood, so the water is blocked, the flood is discharged, the water is impounded, the water flow is dredged, and the river is cleaned up..... There are some things we can't do and we have to wait for someone more powerful to help. ”

"But there are also things we can do. ”

"Only go to the barrier water and do not vent, the water will use the river embankment as a borrowing point, its potential energy will not be dispersed, so the water here has accelerated, the movement is getting bigger and bigger, bigger and bigger, and finally maybe the southeast wilderness will suffer first, and then we will suffer. ”

"And the levee bursts, the important problem is at the bottom, and the pressure of the water here ... No, the power of water is many times stronger than the surface, and the bottom of the embankment cannot bear it, so it bursts, like cutting down a tree, and no matter how thick the tree is, the roots are dug up, then even if it participates in the clouds, such as a building tree, it will fall on the shore of the East China Sea. ”

"And the higher the levee, the greater the water force underneath, the more the river roars, and the greater the risk of the levee collapsing!"

Listening to what Yu Zai said here, everyone probably understood the crux of the problem, and such a huge project is indeed much more troublesome than Chongyong Fortress!

And Yu Zai also knew that the water control project must be built, so in addition to the large meteorological observatory......

Wonders, Mohenjo-Daro Baths +1!

[The riverside floodplain tile with a large bath is protected from flooding.] Each time the flood damage is mitigated, the Floodplain tile belonging to the city produces +1 Faith. 】

This thing is the most practical super-large flood storage project in ancient times!

But Yu Zai still has a sentence to say ahead.

"If the land in the south is diverted, there may be a lot of arable land that will not be usable..."

However, before he could finish speaking, the Great Wizard interrupted Yu Zai.

"Let's cure it first! If there is no more arable land, then reclaim it!"

The Great Wizard made a decision, and immediately ordered all the tribes in the north of Shikishogahara to begin withdrawing from here.

The mossy field, as well as the sorcerers in the northeast of the Asaha Plains, and even the sorcerers who lived in the northern and central regions of Osawa were very nervous to go back, and from now on, the tribes should be completely evacuated from here, and the great sorcerer ordered the tribes in the central region to accept refugees, and distribute the land they used to move to these tribes to live in.

Before the advent of ploughing and ox ploughing, compost and manure, most of the southern tribes were slash-and-burn, or fire farming, and even the tribes in many places in the Central Plains were like this, such as the vicinity of Huaishui where the Chifang clan lived.

So each tribe had at least one or two relocated lands, and they moved here, and when the original land was restored and could be cultivated well, they had to move back again, but now, they no longer moved, and those lands became reserve land, and they were reclaimed.

"This time it's a big disaster in the south, and we have to get through it together. ”