As far as the eyes are concerned, no one dares to live there in the Huaishui area of the Yellow River. If you can find a few families, you can’t provoke some people to take the road. Living there is almost waiting for death.

Compared with the prosperity in the early and middle period of the Northern Song Dynasty, it is really a lifeless scene there.
The most important thing is to divert the Yellow River back to the original road again and break the development deadlock in the Huaihe River area.
And this amount of work is too large, and there are still problems in the treatment of the earth river. The Yellow River carries a lot of sediment, which should be treated as a problem.
In this regard, Su Yonglin mobilized the emperor and the imperial court to summon all the talents in water conservancy that can be found at present, and they discussed the idea of bundling water and washing sand and building an outer dike.
These are the methods that Pan Jixun, a North Korean, came up with to control the Yellow River’s excessive sediment and insufficient flow. Su Yonglin knew something and probably didn’t know the specific operation. He came up with this concept to discuss with water conservancy experts.
As the name implies, the method of washing sand with water beam is to tighten the river channel and speed up the water flow, so as to make the water flow impact the deposited sediment, thus refreshing the river channel and lowering the riverbed.
Building an outer dike is to build another dike in addition to the current river channel outside the Yellow River dike, and expanding the dam quantity is the second line of defense when the water volume of the Yellow River rises.
These are two concepts that Su Yonglin can come up with to control the Yellow River at present. He knows very little about them and can give these water conservancy experts some better ideas by divergent thinking.
In addition, Su Yonglin put forward a plan to solve the problem from the source because of the large amount of sediment carried by the Yellow River.
"You all know that the Yellow River carries a lot of sediment, which gradually raises the riverbed and forms the land river we see today. So where did this sediment come from?"
Su Yonglin looked around and asked, "Has anyone thought about this question? Where does this sediment come from? "
Water conservancy experts, you look at me, I look at you, and then someone raises his hand.
"Sediment naturally comes from swimming."
"Swim? Where can you give such a large amount of sediment to the Yellow River? These sediments will continue to rush with the river until they swim and then swim and deposit? "
Su Yonglin pointed to the map of the Yellow River Road. "Why does the Yellow River water carry so much sediment?" What, he doesn’t have this situation in the river? Then again, a long time ago, there was no Yellow River in historical materials, but it was called River.
I read in the chapter of Wei Feng cutting sandalwood in the Book of Songs that "Kankan cutting sandalwood makes the river dry and the river is clear and rippling", which means that the Yellow River is still clear in the Spring and Autumn Period before Qin Dynasty.
By the Warring States period, the Yellow River had become turbid. The river said that I read "Left" and read the sentence "Once Heqing Life Insurance" in the chapter of Xianggong Year. It can be seen that people at that time had recognized that the Yellow River water would not become clear again even if it died.
By the Han Dynasty, there was already a saying of the Yellow River, which was generally adopted in the pre-Tang and Song Dynasties. Up to now, the Yellow River is said to be deeply rooted in the hearts of the people. Few people remember that the Yellow River used to be a big river with clear waters. "
After that, Su Yonglin asked, "What? Why does the Yellow River change from clear to turbid? Who can explain it to me? I want to hear the specific reasons to be detailed, reliable and well-founded. "
All the crows and finches at the scene
Because in the past, the Yellow River was treated as a headache, and if it overflowed, it would block its banks, and then it would be amended, and there would be no other solution, let alone solve the problem from the source.
At that time, although people had the concept of ecology, they were very simple and general, and they were not integrated with all aspects of social life, so it was difficult for people to realize the importance of environmental protection.
Although some environmental protection concepts were consciously put forward by the ancestors of the Qin Dynasty, such as not catching birds at a certain time and not logging at a certain time, most of them belonged to decrees and laws, which did not tell people that this was
Once these decrees and decrees are implemented, the political subject disappears, and the environmental protection policy will collapse, and there will be no more ecological environment, and the ecological environment will be greatly damaged by extensive agricultural production
The yellow riv is a direct product of this phenomenon.
But this time, Su Yonglin actually gave a new opinion-what will the Yellow River turn yellow?
Water conservancy experts are really out of their depth.
They know how to build dams, how to block the river, and the diversion project is very dangerous. They also dare to take up the challenge to nature, but they really haven’t considered it when they ask them why the Yellow River turns yellow.
Su Yonglin took out a thick stack of paper and put it on the table when they didn’t talk.
"This is the specific report I got after I asked Su Haisheng, commander of Qilu Corps, to go to the Yellow River tour area for in-depth investigation. Please have a look."
Su Yonglin had Su Haisheng’s investigation report distributed, so the officials of the meeting read it five times.
Specifically, Su Yonglin’s Qilu Corps immediately made Su Haisheng investigate the situation on both sides of the Yellow River Basin and focus on observing the soil, vegetation and production and living conditions in the surrounding areas.
Su Haisheng spent a month working hard with the army along the Yellow River to find out everything Su Yonglin wanted to know, wrote five paper investigation reports, and sent someone back to Zhongdu quickly and handed them to Su Yonglin.
Just in time for Su Yonglin to call a meeting to solve the Yellow River problem.
"To put it bluntly, the Yellow River water will become turbid and carry a lot of sediment. The main reason is that the previous dynasties over-developed the central land. They cut down trees and destroyed forests, destroying the vegetation on both sides of the Yellow River.
The loess on both sides of the Yellow River is loose, unlike the soil in the south of the Yangtze River and the north of the Yangtze River. If there are no trees to protect the loess, it will be very easy to be washed away by the river and carried all the way to the middle reaches. Because of the widening of the river, the terrain is flat and the water flow slows down, the loess will be deposited
The Yellow River in the central region has a fast flow speed and strong scouring force, and a large amount of sediment is sent to the middle reaches year after year, and the riverbed is getting higher and higher, which is what we see now. These two are not three or five years. "
Su Yonglin looked at all the people and almost read Su Haisheng’s investigation report, so he made a concluding speech.
"Even if the former government managed the Yellow River temporarily, there was always a recurrence of floods, and sometimes our government needed to tackle the root of the Yellow River, not only to make the Yellow River return to its original course, but also to fight a decisive battle with the sediment."
After reading this report, Zhao Liang was deeply shocked and heard Su Yonglin say that he was busy and asked, "Dare to ask what the decisive battle means?"
"Four words: Returning Farmland to Forest"