Meton nodded and asked again, "Almost all the rivers in Guanzhong are turbid! But which river is the most polluted? The more serious it is, the more the problem is exposed. "
"The Wei River!"
Duan Lun said hoarsely.
At this moment, all the courtiers were silent. This time, they were not blinded. The Wei River flowed beside Chang 'an every day. It was the river they were most familiar with. Everyone knew how muddy the water of the Wei River was, but they had always turned a blind eye to it.
"The first time I entered Taiji Palace and saw the civil officials and generals divided into two sides, a word immediately appeared in my mind. Clear division," Meton said with a sigh.
"Clear division? What do you mean? "Cheng Yaojin asked in puzzlement. This was the first time he had heard of this word.
Merton said, "The Jing River is a tributary of the Wei River. But the Jing River's water is unusually clear, and the Wei River's water is turbid. So at the intersection of the two rivers, there is a spectacle. The river water is half turbid, half clear, and stretches for miles."
The officials in court couldn't help but blush. This "spectacle" was very ironic.
"So the sand of the Wei River comes from the other tributaries above the Jing River," Cheng Yaojin said thoughtfully.
Meton nodded and said, "Then the question is, why is there so much sand upstream of the Wei River! If we can solve the sand problem of the Wei River, the problems of the other rivers can be solved. "
Li Shimin took a deep breath and said, "Bring out the map of Guanzhong."
An enormous map of Guanzhong was spread out in Taiji Palace. Li Shimin looked darkly at the map of the Wei River.
"Black water, Ba water, Lacquer water, Thousand water …" Li Shimin's expression grew uglier as he looked. The Wei River was too large.
"According to this analysis, the sand of the Yellow River comes from this area." Li Shimin reached out and drew the general area of the Yellow Plateau.
All the courtiers nodded involuntarily. Suddenly, their expressions froze as their gazes involuntarily drifted towards the few courtiers at the front, especially Zhangsun Wuji.
Guanzhong, especially the Yellow Earth Plateau, was under the influence of the Guanlong Corporation, and Zhangsun Wuji was the representative of the Guanlong Corporation in the imperial court.
Meton nodded without noticing. "That's right. What we need to figure out now is why the soil in this place is leaking so much."
This time, no one answered. Qin Qiong wanted to dissuade Meton, but he was stopped by Cheng Yaojin. There was no turning back. Since it had come to this point, there was nothing that couldn't be said. If he retreated at this time, it would make the emperor unhappy.
Duan Lun glanced at Zhangsun Wuji, gritted his teeth and said, "This place is filled with yellow soil and the soil is loose. Once it encounters rain, the soil will be washed away."
Meton nodded solemnly. Seeing the two pots of dense potted plants outside the Taiji Palace, he had an idea. "The School of Mohism calls this phenomenon soil erosion. If we want to retain the soil, we must understand how soil erosion is formed. Why don't we do an experiment? "
"Experiment?"
Everyone was familiar with this term. The School of Mohism's experimental field was famous in Chang 'an City.
Meton walked to the potted plants and looked at the huge potted plants. He tried to move them, but the potted plants didn't move at all. He said to Xi Junmai awkwardly, "Big Brother Xi, please help me. Move the potted plant on the right out into the rain."
Xi Junmai suddenly had a headache. You are too daring to move things in the Taiji Palace. He couldn't help but look at Li Shimin.
"Move!" Li Shimin waved his hand and said.
Xi Junba accepted the order and stepped forward. With a little effort, he moved the potted plant outside into the rain.
"Big Brother Xi, break this potted plant and move it out into the rain."
Xi Junmai's face twitched. Meton didn't attend court many times, so he naturally didn't know that these two potted plants were Li Shimin's beloved items. Meton actually dared to destroy the potted plants.
"Break them! If we can solve the problem of the Yellow River, a potted plant is nothing. "Li Shimin endured the pain in his heart and waved his hand.
Xi Junmai accepted the order. Clenching his teeth, he broke the potted plants and moved them out into the rain.
Outside the Taiji Palace, the rain poured down and soon filled the potted plants. Meton had Xi Junmai move them back into the palace.
"Your Majesty, please look!" Meton pointed at the rainwater channels between the two potted plants.
Li Shimin saw that his beloved potted plants had been ruined by Meton and his face couldn't help but turn red. It took a long time for him to calm down.
Fortunately, Li Shimin was a wise ruler. He suppressed the anger in his heart and came in front of the potted plants. He saw that the rainwater at the bottom of the undamaged potted plants was very clear. The broken potted plant had no leaves to block the rain. The rainwater washed the soil and the bottom of the potted plant was filled with muddy water.
Merton said, "The Minister once researched history and found that in the Pre-Qin period, Guanzhong was covered in forests. At that time, the Wei River was unusually clear. Because large amounts of forests were cut down and cleared for land, the yellow soil was exposed to the air. This caused the loss of soil, just like this broken potted plant."
Many of the officials nodded. If this was the case, then it was true that the trees were cut down.
Meton sighed and said, "In reality, what the people do not know is that with the rain, not only soil, but also the fertility of the land. In the long run, the fertility of the farmland will be lost, and Guanzhong will become more and more barren. At that time, the grain will decrease, and the people will not be able to make ends meet. Then the people will clear more land to survive, and then the fertility of the land will be washed away by the rain. This will be a vicious cycle.
The Minister also heard that the upper reaches of the Wei River have been washed out with many deep gullies. If it is not controlled, year after year, the upper reaches of the Wei River will become thousands of gullies and broken like cracked pottery. At that time, the once fertile Guanzhong will become history. "
Meton finished speaking in one breath. The entire Taiji Palace became deathly silent.
Guanzhong was the foundation of the Tang dynasty. It was not an exaggeration to say that it was the dragon vein of the Tang dynasty. At that time, Guanzhong's foundation would probably be destroyed.
Meton thought of the fragmented state of the Yellow Plateau in the future and felt like his heart was being cut by a knife. If in this era, he could slow down the erosion of the Yellow Plateau, perhaps everything would be not too late.
"So the people of Guanzhong opening up the land to farm is the ultimate reason for the sand of the Yellow River?" Li Shimin said bitterly.
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