Otaku Engineer in Great Tang Dynasty

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In modern times, there is a song called "Descendants of the Dragon". There is a line in this song that reads: "There is a river in the far east, and its name is the Yellow River..."

The Yellow River, the mother river of the Chinese nation, this surging mother river gave birth to the splendid Chinese civilization, but she has never been a "good mother". The continuous diversion and flooding in history have brought countless times to the people of the Yellow River Basin. Devastating disaster. Even in the modern age of the 21st century, there are still a lot of floating corpses on the Yellow River!

Throughout the development of human civilization, it is actually a history of struggle between man and nature, with harmonious coexistence and tension. With the vigorous development of Chinese civilization in the Yellow River Basin, more and more human activities and the expanding population encounter floods, which will inevitably develop into floods.

Judging from the change of dynasties in Chinese history, the Yellow River Basin has always been in a cycle of decline-war chaos-reconstruction-prosperity-decline. Every new round of prosperity is a new round of disaster for nature. As the farming civilization of the Han culture moved more and more southward, the sediment accumulated for hundreds of years finally ushered in a new round of outbreaks.

By the Ming and Qing Dynasties, the Yellow River had more frequent ruptures and diversions.

According to "Introduction to River Management in the Ming and Qing Dynasties", in the 277 years of the Ming Dynasty alone, the number of breaches and diversions of the Yellow River reached an astonishing 456 times, which occurred once every seven months on average. . In the 1,500 years from the Eastern Zhou Dynasty to the end of the Tang Dynasty, the number of dyke bursts in the entire Yellow River Basin was only more than 60 times, and the dyke burst and flood occurred only once in 25 years on average!

While the Yellow River floods took away millions of lives, it also caused a large number of refugees to flee and migrate, forming a population flow situation of "big disasters and small disasters". Among the more than 60 million registered population in the Ming Dynasty, about one-tenth of them became refugees.

The most affected area is Henan. In the early Ming Dynasty, 72% of the flooding occurred in Henan Province!

Of course, if this is the case, the amount of money the court spends every year on building river embankments and controlling floods is even more incalculable. According to historical records, during the Ming Dynasty, the annual cost of building river embankments and controlling floods reached 70% of the government's fiscal revenue. About 10%, during the Qing Dynasty, this ratio once reached a terrifying 20%!

In the Hall of Ganlu, the atmosphere at this moment suddenly became tense.

Li Er asked with an ugly face: "There will be a flood in Luoyang in nine years~? Li Zexuan, did Lingxu really have this prophecy before his life~?"

The five ministers in the hall all looked at Li Zexuan with burning eyes. The Yellow River burst its banks and flooded Luoyang. This is not a trivial matter, and the real person Lingxu has been infinitely mythical by many people. Make people pay attention!

Last year, Li Zexuan said that in June this year, a large locust plague would break out in the land of Guanzhong. Finally, with the guarantee of the military commander group headed by Qin Qiong and Cheng Yaojin, the imperial court sent a fleet south to trade and exchange food.

At that time, Zhangsun Wuji and other officials in the Wenchen Group felt that even if the locust plague would not break out as scheduled, it would not be a loss for the imperial court to exchange so much food at such a low price from a small Nanyang country! And everyone can predict that the decisive battle between Datang and the Turks will be within a few years. Even if there is no locust plague, Datang will still need a lot of food and grass to prepare for the battle!

Therefore, they also agreed with Li Zexuan's plan to collect grains!

But now Li Zexuan said that there will be floods in Luoyang in nine years, causing the whole city to be flooded. Is this still worth it?

You know, Luoyang City's status in Datang is second only to Chang'an. In the first year of Emperor Yang's great career in Sui Dynasty, Luoyang was already established as the capital of the east. After Li Yuan established the Tang Dynasty, he ordered people to build palaces in Luoyang. Later, Wu Zetian, who had already ruled over the power and ruled the dynasty, directly controlled the east. The capital of Luoyang was renamed the capital of gods, which shows the important position of Luoyang in the Tang Dynasty!

Chang'an City is the political center of Datang, while Luoyang is the economic and cultural center of Datang! Although the population of Luoyang City is not as good as that of Chang'an, it is not far behind. There are at least 700,000 to 800,000 people in the city!

If Luoyang City were to be flooded, the loss would be too great!

Under the gazes of everyone, Li Zexuan bowed his hands to Li Er with a look of awe: "Your Majesty, the matter is of great importance, and this minister does not dare to speak falsely! The teacher has said that in the eleventh year of Zhenguan, the sky is full of yellow air, the rain is heavy, the valley water is overflowing, and Luoyang Palace, four feet deep, destroyed Zuoyemen, destroyed the palace and temple 19~!”

Li Zexuan did not dare to talk nonsense because of the importance of the matter. According to the official history, Luoyang City would indeed be submerged by the flood in July of the eleventh year of Zhenguan, but these words were not spoken by the real person Lingxu, but written in the history books!

"What? Water enters Luoyang Palace?"

Hearing what Li Zexuan said was serious, as if he had seen it with his own eyes, Li Er's face was immediately covered with a haze. Will it flood the sky and bury millions of corpses?

"If according to your words, planting trees and afforestation in the Yellow River Basin will prevent the flood disaster in Luoyang in nine years~?"

Last year, Chang'an City had no snow all winter, and this year's locust plague was almost a foregone conclusion. Li Er dared not ignore Master Li Zexuan's prediction of Lingxu Zhenren.

Li Zexuan pondered for a moment, then cupped his hands and said, "Your Majesty, as the saying goes, it takes ten years to grow a tree, and a hundred years to grow a man. It does not take a day or two for a sapling to grow into a big tree, and improving the soil structure of the Yellow River Basin is definitely not something that can be accomplished within a year or two. of!

The minister cannot guarantee that planting trees can change the fate of the flooded city of Luoyang nine years later, but compared with building dams and disaster relief, planting trees is definitely the most effective and efficient way to deal with floods.

The cheapest way to control the Yellow River!

Once there is a large-scale shelter forest in the Yellow River Basin, the sediment content in the Yellow River will be greatly reduced. Even if the Luoyang flood cannot be avoided in nine years, there may be overhanging rivers and dam failures in ten or twenty years. The dyke will not appear easily again! This is a matter of merit in the present and benefits in the future. Your Majesty is wise and wise, and has lofty aspirations. I hope that Your Majesty will make a prudent decision! "

Although the number of floods in the Yellow River in the Tang Dynasty was indeed more frequent than in the previous dynasties, compared with the following dynasties, the Song, Ming and Qing dynasties, the floods in the Tang Dynasty can be said to be less frequent and not serious at all!

However, Li Zexuan, as a descendant of the Yellow River and a transmigrator who knows the future, since he was reborn in such an open and inclusive era, he felt that he had the responsibility to govern the Yellow River when it first became dirty. To avoid tens of millions of future generations, hundreds of millions of Han Chinese died in the flood!

Those people who died in the Yellow River flood are all his compatriots!

His prosperous Tang does not allow any regrets!

So Li Zexuan spent a lot of energy and words to persuade Li Er and this group of imperial ministers to believe in his policy of planting trees and preventing floods!

Thousands of years later, no one may remember Li Zexuan, Marquis of Yongan, but those who grew up drinking the water of the Yellow River can remember him as the initiator of afforestation!

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