Chapter 432 Governing the water to the heavens

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For the Chinese nation, the water of the great river is like milk, and countless children of the great river have been raised for generations, but if you have to climb a relative and call it the "mother river", you must remember that this mother is not very good-tempered, and the flooding and bursting of the embankment are still light, and she has to change the course at every turn.

Compared with the "big river", the name of "Yellow River" is more appropriate, worthy of the name, but how heavy a "yellow" word is, and how much suffering, sadness, life and death are separated, and joys and sorrows, I am afraid no one can say clearly. Since the beginning of Dayu's water control, all dynasties and dynasties, but whenever the emperor wants to do something, water control is indispensable.

It's a pity, but the more you rule, the more yellow it gets.

The reason why the name "Yellow River" appeared in the Western Han Dynasty was because of the expansion of the scope of human existence and the needs of life, a large number of forests and trees were cut down, which destroyed the vegetation of the Loess Plateau and caused serious soil erosion.

So what to do?

Is it to protect the forest, so that people still live in caves and eat raw meat? If there were no human beings in the world, who would care if there were more deserts or more forests on the earth?

On the other hand, whether the Yellow River is diverted or its banks burst, it is undoubtedly a great disaster for the people living along the Yellow River at that time, but if the timeline is extended, these "disasters" can bring more impact plains, make the land more fertile, and even reclaim land and expand the territory...... It seems to have a good effect.

It is easy for people to water an ant nest, but in the face of nature, how can people themselves not be ants? The houses that had been built with great painstaking work and the cultivated land that had been cultivated were destroyed in a blink of an eye.

Therefore, if human beings want to live a better life on the earth, in addition to fighting against nature, sometimes they must compromise with nature and learn to use natural resources more rationally.

Now, Liu Hanshao is the emperor of the Han Dynasty, and Xiahoudun is the minister of water resources, and when they sit down to eat together, they naturally have to discuss the topic of governing the Yellow River.

Liu Han ordered someone to bring a bucket of water, and slowly poured down along the mound, only to see the water rushing out of a deep groove in the mound, carrying a large amount of soil to roll to the flat ground, and after a wanton flow, he chose a low-lying place, merged with the water flow, and flowed into the distance.

"You all saw it, right? This is the reason why the great river is yellow. The big river comes from Liangzhou, and when it passes through Bingzhou, it goes around a huge loess mound, and then carries a large amount of sediment through Sizhou and flows to the downstream plain. However, when the big river is cool, the drop is large, the water flow is rapid, no matter how much sediment in the river can be washed down, but after passing Sizhou, the terrain is flat, the drop is small, and the water flow is slow. The sediment could not be completely washed away, but remained at the bottom of the river little by little, gradually raising the riverbed until the embankment burst and flooded. ”

Xiahoudun asked in horror: "Your Majesty, doesn't this mean that our Ministry of Water Resources must continue to raise and repair the embankment in the middle and lower reaches of the river in order to prevent the river from flooding?" ”

Liu Hanshao nodded and said: "Theoretically, it should be so, but the power of nature is difficult for us to resist, and it is even more difficult to estimate." You have worked hard to repair the river embankment, but this year the water is heavy and rainy, and the sudden rainstorm forms a flood peak, and suddenly hits, can your river embankment withstand it? ”

"Yes!"

Xiahoudun first let out a tiger roar, but when he thought of Hong Feng rushing to the embankment, he really couldn't guarantee that he could bear it every time, so he lowered his face again, and asked almost crying: "Your Majesty, what should I do?" So what should we do? ”

Liu Hanshao comforted and said: "Don't worry, Yuanrang, since we can find out the problem, let's think of more ways to do it little by little." When my brother handed over the Ministry of Water Resources to you, wasn't it because you had perseverance and perseverance that you could endure this hardship and endure this loneliness? ”

Then, Liu Hanshao said: "The biggest reason why the big river is more prone to flooding than other rivers is that it carries too much sediment and constantly raises the riverbed, so if you want to control the water, you must first control the yellow, and if you want to control the yellow, you must first control the mountain." ”

In the past, Xiahoudun thought that water conservancy was nothing more than building canals and digging ditches, diverting water to irrigate fields, building dams and berms, and dredging rivers, but now when he heard Liu Hanshao say this, it was obvious that there was a lot of knowledge in it, and he couldn't help urging: "Your Majesty, tell me quickly, how do we control Huang, and how do we want to control the mountains?" ”

"Simple, the meaning of controlling yellow is not to let so much sediment run into the big river, and if you don't want the sediment to run into the big river, you must first restore the vegetation and consolidate the soil."

Liu Hanshao felt that what he said was very clear, but the others were stunned when they heard it, including Cao Cao. So, he dipped his fingers in the wine, wrote the word "several" on the table, and said: "Brothers, look, this is our big river." Starting from Jincheng in Liangzhou, it has been circling around Bingzhou, and then flowing into Sizhou. The problem is that after sparing such a large circle, there is loess all around it, especially in the middle of this circle, which is a big mound, and not only the big river carries its own sediment, but those tributaries also bring a lot of sediment into it. Another problem is that the land is actually relatively arid, and there is little rain, so even if you want to dig a well, you have to dig several feet deep into the ground. In the southwest of Shuofang, beyond the Great Wall, there are even many places that have become Gobi and deserts, and the northwest wind can blow more sand into the big river. ”

Immeasurable Heavenly Venerable, oh grin.

The more Xiahoudun listened to it, the worse he became, as if the word "several" written by Liu Hanshao was a spell that was slapped on his head.

Cao Cao couldn't help it, and asked like Xiahoudun: "Han Shao, then tell me, what should we do?" ”

"Don't worry, do you know why this place is dry?"

Seeing that everyone shook their heads and looked cute, Liu Hanshao drew another ear next to the word "several", and then said unhurriedly: "Look, this is the seaside." The sun warmed the sea and evaporated it into vapor, clouds, which were blown by the southeast wind and began to be carried onto the land. But to the north, there is also the sea, because the sun is less, so there are perennial icebergs here, and the northwest wind blowing out is also cold. As soon as the cold wind from the northwest and the hot wind from the southeast meet in the sky, and when they rub together, the water vapor is cold, and it turns into rain and falls again. Therefore, in summer and autumn, the southeast of our Han Dynasty has the most frequent rains, and there are even many floods. The northwest of Bingzhou was too far away from the sea, and the hot wind with rain could not blow here, so it was rubbed down by the cold wind from the northwest. Moreover, the high terrain of this large mound in the circle is not conducive to the hot wind blowing up from the southeast. However, there are exceptions, if you are not careful, which hot wind is strong and blows up, and meets the cold northwest wind here, causing precipitation, it may be big and urgent. ”

The others don't understand it or not, but the last sentence, Xiahoudun can help confirm it, because he has been in this area for a long time, and he still knows the local weather and climate better.

"Well, Your Majesty is not wrong at all. This is the way it is, if it doesn't rain, it doesn't rain, and when it rains, it may be very fierce. ”

Cao Cao still didn't understand, and asked stupidly: "So what?" ”

Xiahoudun looked at Cao Cao with caring eyes, and explained: "Therefore, the rain is heavy and rapid, and if it flows into the big river, the river will swell, and it is easy to wash away the river embankment, turn it into a flood, and flood the fertile land!" ”

Originally, it was just a matter of water control, but I heard Liu Hanshao flicker from the ground to the sky, although Xiahoudun still didn't understand how to treat the water of this big river, but he had already thrown himself into Liu Hanshao's five bodies and was extremely convinced.

"Your Majesty, you are the Son of Heaven, can you not let this place be dry again?"

Burst...... Liu Hanshao felt that his fool just now was almost blind, and said angrily: "Didn't my brother already tell you the way?" Restore vegetation and strengthen the soil! ”

It was also because what he said was too simple, Xiahoudun couldn't understand it, and then patiently explained: "It means that there are many kinds of trees and grasses, so that these tree roots and grass roots can be rooted in the soil, just like a net one by one, and the soil will be netted in it, and the soil will be washed away by the river, and the sediment in the river will naturally be reduced." ”

Xiahou asked anxiously: "If you plant trees and grass, don't you grow food?" What did the people eat? ”

Liu Hanshao pointed to the middle of the word "several" with his hand, and said angrily: "Do you think this is your backyard?" How big is this place, have you walked it all? ”

Xiahoudun scratched his head "ashamedly" and asked Liu Hanshao to continue speaking.

"First of all, let's be in Hexi...... Brother is not talking about Xihe County, but west of the big river, those places that have been desertified, planting shelterbelts to prevent the northwest wind from continuing to blow sand and dust into the big river. In these places, the environment is very harsh, and the trees planted must also be cold and drought resistant, such as poplar trees, sand date trees, as well as sea buckthorn and saxon. Then, along the waterway of the big river, plant big trees in the gentle places and shrubs in the steep places, because the loess is soft, and if you plant big trees in the steep places, you may be completely washed down in the event of heavy rain, and then you will be involved in the river, and the disaster will be even more serious. Needless to say, alfalfa is very good, cattle and sheep also love to eat, but sheep can't be too much, this thing is too ruthless, even the grass roots are gnawed. Now in the southwest of Shuofang, the Gobi and desert on both sides of the big river, in addition to the cause of drought, also have a lot to do with the group of donkeys riding in the north, because they herd too many sheep! ”

Hearing this, Xiahoudun slammed the table and said indignantly: "These damn Hu slaves should be killed......

Before he finished speaking, Xiahoudun seemed to remember something again.

No, the current Southern Xiongnu has been pacified, most of those people have gone to farms and corps, and most of their subordinates are also Qianghu and Xiongnu prisoners, if they are all killed, who will work for themselves? Besides, these people will also be from the Han Dynasty in the future, and they are not allowed to be treated differently, and it is too inappropriate for them to say that they will not be killed.

But that's not right. Further north, there are Xianbei people, they also have a large number of cattle and sheep, if His Majesty said that sheep can't be raised too much, will Xianbei people be obedient, so they won't raise so many sheep?

Since Your Majesty can cure the water to the sky, he will definitely be able to cure Xianbei, otherwise he will kill them.

Well...... That's it!