The water of the Yellow River came up from the sky, rushed to the sea and never returned. But by mid-July, the water of the Yellow River would bring serious flooding, so Su Yan was also quite anxious. To be honest, she has no experience with this kind of herself, and all she can learn from is the wisdom of modern people.

The biggest problem of the Yellow River is that when it encounters floods, there is a danger of bursting its levees, and in some places the water of the Yellow River is higher than both banks, becoming a heavenly river, so once the levees burst, the disaster involves hundreds of thousands or even tens of millions of people's lives and property.

The imperial court also adopted the method of raising the river embankment several times before, which effectively prevented the embankment from bursting. But if it is higher in this way, the Tianhe River will be higher, like an egg, and the higher it is, the more dangerous it is, so this is not the fundamental method of governance.

Again, the problem of the Yellow River being cut off and soil erosion is also a headache.

Fortunately, I am a student of the Department of History, although I am not a good job, but for ancient times, I can summarize some methods through historical data. Su Yan wailed, she finally got out of the life of high school in the last story, and immediately started to write her thesis.

Write by candle night, polish the ink, and Su Yan takes up the pen.

First of all, in the long run, we should focus on controlling soil erosion, protect and increase the forest area in the middle and upper reaches of the Yellow River, which has serious soil erosion, increase the vegetation coverage rate, strictly prohibit land reclamation, promote livestock captivity, reduce soil erosion, increase soil moisture content, and improve the ecological environment. Create a sustainable ecological environment. Secondly, it is necessary to continuously dredge the river channel, rationally use the water from the reservoir dam to wash the river bed, reduce sediment deposition, and deepen the river channel.

Secondly, it is necessary to take into account the overall planning, unified planning, rational and scientific use of water, and avoid flooding and other wasteful behaviors of water resources. Su Yan pondered this point, this is a modern problem, there doesn't seem to be such a serious interruption in ancient times, and if you think about it yourself, you should consider it for future generations.

It's just that it's too late now, so at this time, it is necessary to strengthen the embankment and solve the upcoming flood season first.

After writing it, Su Yan immediately went to find Xu Mu. At this time, she was not the only one who stayed up late, and Xu Mu wanted to rely on this credit to win the hearts of the people, so it would naturally take a lot of effort. Sure enough, Xu Mu's study was still brightly lit.

directly opened the curtain and went in, Su Yan saw that Xu Mu was too tired and leaned on the chair to nap. Wei Wende sighed, now at this age, it is still a high school dog, but in ancient times, it was a great pressure to directly deal with such a major matter related to people's livelihood.

Without disturbing him, Su Yan took a cloak from the side and draped it on Xu Mu's body. Then he tiptoed to blow a few lamps near him, and let him rest for a while.

The relationship between Su Yan and Xu Mu is sometimes really intimate, which is a legend in the mouths of outsiders. What level of intimacy is it? That is, at this time, Su Yan directly helped Xu Mu's desk deal with some twists and turns, but no one would say that this was wrong.

Looking at the various news below, Su Yan also had a headache, whether this was bullying Xu Mu for his young age, or bullying him I don't know some hooks and tricks, and some trivial things have been reported.

After dealing with them one by one, Su Yan took a look at the officials who reported trivial matters, most of them were the Xiao family's feather party. Before she came, she had done her homework, so she naturally knew what amulets were also prevalent here. It's just that he is holding Shang Fang's sword, so he can't stay out of the matter, not to mention, this trip was originally to add credit and weaken the Xiao family's power.

"Hmm, why did Lone fall asleep. Muttering, Xu Mu woke up, stretched his waist, and found that Su Yan was handling the recital for himself at the desk.

Xu Mu walked in, looked at Su Yan's serious face under the lights, and couldn't help but bring a smile, and even his tone slowed down. "Zhao Yan, when did you come?"

"Please also ask His Highness to call the courtier Ziyu, it is impolite to call him by his name like this. Su Yan naturally had already reached the crown, so she took the word.

Xu Mu was silent, watching that the chapters were all put away by her, and then she took out a copy to read, and she also understood the reason.

"Your Highness, this is the minister's method for controlling the floods of the Yellow River, take a look. He took out the fold from his sleeve and handed it over to Su Yan. Although her tone was respectful, Su Yan was sitting in Xu Mu's position at this time, and she didn't get up.

However, only Xu Mu doesn't mind, right?

Xu Mu took it and opened it directly. For Su Yan's words, Xu Mu still likes them very much. Seeing words is like seeing people, in addition to being stable and generous, Su Yan's words also have a sense of transparency, as if she has experienced a lot of things, and has a sense of wisdom and foolishness.

looked carefully, and in the end, Xu Mu couldn't help but shout. The above suggestions are not only for the present, but also for the long-term, it can be said that the symptoms and the root cause are all there, it can really be said that the long-term vision, if you really do this, it will also be utilitarian.

In the evening, Xu Mu directly called the chamberlain in, asked them to copy several copies of this recital, and sent it to the various prefects and county officials overnight, and instructed them to start construction immediately.

It was late at night, and it was estimated that it was one or two o'clock in the morning, and Su Yan was also sleepy, so she couldn't help yawning.

"Are you tired?" Xu Mu's eyes flashed with a hint of distress.

Su Yan nodded.

"It's also time-consuming to go back to you, so if you don't mind, let's rest here in Lone. Xu Mu made a suggestion, and seeing that Su Yan was a little hesitant on his face, he added, "Lone also has some questions that he wants to invite a teacher, not to mention, between the wise men and the masters, it is inevitable that there will be sympathy for each other, and it will be good for Gu and Ziyu to have a good story in the future?"

Su Yan stared at Xu Mu's eyes, a little begging and pitiful, women are inevitably a little maternal, just so soft-hearted, Su Yan nodded, and found that Xu Mu's eyes were instantly bright.

Of course, I don't know what to think about, the situation that Su Yan was worried about two people sleeping together did not appear, which made her breathe a sigh of relief. Today's travel is tiring, plus staying up late, she can't bear it, thinking that she will have to deal with those officials tomorrow, Su Yan didn't listen to what Xu Mu said, so she fell asleep.

Xu Mu kept talking, and then he didn't hear Su Yan answer for a long time, he got up and glanced at Su Yan, and found that they were asleep, crying and laughing.

Quietly covering the quilt for Su Yan, Xu Mu hesitated for a moment, looked at Su Yan, and his expression struggled a little.

Looking at the sleeping Su Yan, Xu Mu's hand gently helped her pull a few strands of messy hair aside, and accidentally touched Su Yan's skin, Xu Mu froze.

Smiling slightly, all the hesitation turned into firmness, Xu Mu leaned down, and quickly and shyly dropped a kiss on Su Yan's cheek, and then it could be seen that Xu Mu even blushed his ears.

"Good night. ”