Chapter 533: Talk by looking at pictures

After having a deal with the Liao people and resolving the Xiongzhou crisis, Su You reported the situation to Sima Guang and continued to lead the exploration team.

This river condition investigation lasted for more than a month, and the science and engineering teams sent to various parts of Hebei gathered again in Yingzhou.

Next comes the complicated and difficult statistical calculation work.

However, this matter was left to Shen Kuo and Chen Zhaoming. Shen Kuo also wanted to draw a fine contour map of the entire Yellow River Flood Area in Hebei.

While Sima Guang and Su You were sorting out local hydrological and historical data, Sima Guang also urged Hebei to rush to plant winter wheat, and Su You urged the promotion of the work-for-relief program.

By the end of November, a lot of work had achieved results. More than ten states in Hebei were affected by the disaster. Thanks to the timely deployment of transportation and the effective supervision of Sima Guang and Su You, no major disaster was caused.

However, to return to the old state, we need to wait until the wheat is ripe in June of the new year.

In addition, the Yellow River has been rerouted, and almost all previous river control projects have been scrapped, so new projects cannot be delayed.

Zhao Xu could no longer wait and asked Sima Guang and Su You to return to the capital immediately.

So the two had no choice but to lead the engineering team back through the waterway and continue working on the ship.

After a long and dusty journey, it was already past the two-year period for the imperial court meeting when we returned to the capital.

However, when the important ministers returned to Beijing, they also brought with them the popular sentiments, political sentiments, river sentiments, and military sentiments of Hebei Province. Zhao Xu issued an edict, played the Jingyang Bell, and the ministers entered the court to start another big discussion.

Sima Guang and Su You, with their combined power in the court, already know the current layout of the court very well.

Su You even had doubts about Zhao Xu, whether sending Sima Guang out to patrol the river was a deliberate arrangement to prepare Wang Anshi for taking the throne.

After all, both of them are Hanlin bachelors. Whenever they have different opinions, if you want to mention one, you must suppress the other.

Yes, just a few months after leaving the country, Wang Anshi's influence on Zhao Xu has greatly increased. The most important thing is that except for Fu Bi, Han Qi and a few other veterans, everyone is full of confidence and expectations for Wang Anshi.

Fu Bi even personally advised Su You as an elder to cooperate with Wang Anshi. Although he had doubts, he still took luck.

Under such a general premise, Su You could only keep silent and save himself first.

At the court meeting, Sima Guang presented a thirty-volume "Advice on the Condition of the River": "Your Majesty, this is the investigation that I and Su You have made over the past several months. In addition, there is also the "Beiliu Map" produced by Shen Kuo and Chen Zhaoming.

Sutra. "After our investigation, we found that the old eastward flow path is now blocked, and the capacity of the Ergu River is insufficient to divert the flood, so the idea of ​​returning to the river is no longer feasible."

As soon as this theory came out, the court was shocked.

Song Changyan, a staunch supporter of Huihe, was lobbying Wang Anshi during this period, and Wang Anshi had agreed in principle, and was also prepared to make this his first practical task when he took office as governor and achieve results.

Now Sima Guang says that the proposal to return to the river is no longer feasible, which completely overturns his insistence.

So he went out and said: "Cheng Fang, the servant in the Tuntian Du prison, discussed with the ministers before and insisted on returning to the river. Now I am reporting that the discussion between Sima Xueshi and Su You is inconsistent. He invites the powerful and powerful, and begs your majesty to rebuke him."

Su You almost fell down in anger. I was only in the third rank. "I would rather be a prisoner than a prisoner." He was the most miserable judge and prisoner among the officials. How could he become a powerful person?

Chu Li said: "Cheng Fang's previous proposal to return to the river was because the data in his hand was inaccurate and his thinking was not precise. Your Majesty, please let Shen Kuo unfold the map so that he can answer the questions of the officials one by one."

Zhao Xu actually wanted to return to the river in his heart. The river changed its course. No matter how you looked at it, it was the king's misconduct. It was an explanation for him to return to his old path.

Now that I came back from the investigation, I found this result. I couldn't help but feel disappointed and wanted to know the truth, so I said, "It's accurate."

The huge map unfolded, and the officials realized that the value of this map was not as simple as the rough maps in the past.

The rivers and sea areas are marked in light blue on the map, and the states and capitals are marked in four colors. Starting from the coastline, circles of contour lines can show the trends of mountains and rivers, and the geographical location.

The place names are very carefully marked, and there are also various symbols.

In the lower left corner of the map, there is a symbolic legend. On the outside of the map, there are black and white scale bars, as well as vertical and horizontal lines of latitude and longitude.

Su You said: "Because of the rush of time, the map work is not detailed and is still rough, but I can already get a rough idea."

The ministers were almost stunned by the thunder. This is called roughness, and all the former officials of the Yu Department will die.

Su You pulled out a long pointed wooden stick from the scroll at the bottom of the map, and the ministers' foreheads were filled with black lines. They all said that Su Mingrun was very sophisticated, and now he had learned a lesson.

Su You pointed at the map and said: "Your Majesty, Prime Minister, all ministers, please take a look. The river on the map is from the north of Wei to En, Ji, Qianning and enters the sea after the Shang-Hu River. It is called Beiliu.

."

"And this river course was in the eighth year of Jiayou. The river reached the sixth point of Wei, forming two branches, from Wei, Endong to De, Cang, and entered the sea. This is called east flow."

"Song Chang's strategy was to place a kettle on the west side of the two strands and divert the water to the east."

"After the east flow becomes deeper and the north flow becomes shallower, the north flow will be blocked, and the Yu River and Hulu River will be separated from the Yellow River to relieve the troubles west of En, Ji, Shen, and Ying. In this way, the old course of the Yellow River can be restored and the Yellow River can be restored.

River water transportation has returned to the old concept. Deputy Supervisor Song, is that so?"

Song Changyan was looking at the map and thinking deeply. He suddenly raised his head after hearing this: "Yes, yes, the Su case is judged. Judging from the map, this proposal is not unfeasible."

Zhou An was also responsible for river and canal affairs. Song Changyan treated Su You with this position.

Su You said: "This plan looks good, but after careful measurement, we found that it has huge risks."

"Look here, this kind of line, we call it a contour line, is based on the sea level and is connected in a line every five meters in height."

"We call the vertical height of a location from the sea level 'elevation'. Here is the altitude of the entrance to the Ergu River, Weizhou No. 6, and here is the altitude of Shanghukou in the north of Weizhou."

"Comparing the two, the entrance of Ergu River is three meters higher than Shanghukou, ah, that's almost one foot."

"Don't underestimate this one foot. If the breach breaks out at forty steps, think about how much water there will be. Not to mention making it a river as wide as two hundred steps."

"After our calculations, the Ergu River channel can accommodate up to 40% of the water volume of the Yellow River. If Deputy Supervisor Song's plan is followed, the existing channel of the Ergu River needs to be scoured down to a depth of three meters to reach the depth of Shanghukou!"

Song Changyan said: "Sewing water to wash away sand has been practiced since ancient times. Nowadays, this method is used to maintain the Bian Canal for four hundred miles. It can be washed down three meters, oh, one foot, so what's the difficulty?"

Su You said: "The old sand has not been exhausted, but new sand has come again. Now the sand content in the middle and lower reaches of the Yellow River has reached 44%!"

As soon as this statement came out, there was another uproar in the DPRK. This data is too terrible.

Su You asked his attendants to get three glass tubes: "Don't be too alarmed. Please see, the first tube is a water sample collected from Bianjing; the second tube is collected from Shanghukou; the third tube from Di

, collected from Haikou.”

"In fact, not all 44 percent of the sediment cannot be washed into the sea. Almost half of the fine sand can be washed into the sea. The remaining coarse sand is the culprit of the siltation of the Yellow River."

I heard a sound of relief in the hall. After all, the Yellow River is right next to Bianjing. It is not that it has never burst. If 44% of the sediment is completely silted up, then it will be okay.

Su You continued: "The degree of sedimentation is also related to the speed of the water flow, and the speed of the water flow is also related to the drop."

"The altitudes of Shanghukou and Ergu River are not much different, so the longer the river, the gentler the slope it flows through. At the same depth and width, the slower the water flow. Everyone should understand this, right?"

Courtiers are all smart people with Jinshi background. This principle is easy to share.

Su You said: "Looking at the map, it's the same. The Yellow River burst and changed its course this time because it chose an easier channel. The changed river course is hundreds of miles shorter than the original river course."

Song Changyan said: "But these can still be solved by concentrating water and flushing sand. By forcing the Ergu River into a narrow channel, the flow rate can also be accelerated and siltation can be avoided."

Su You smiled and said: "Deputy Supervisor Song has stepped into a corner. Since the old way can be forced, isn't the new way equally as good?"

After speaking, he pointed to the map: "Here, from Leshou to Qingzhou, there is a straight waterway. According to the method described by Deputy Supervisor Song, the riverway can be shortened by dozens of miles and reduce the possibility of sedimentation in this section."
Chapter completed!