As soon as Su Hao said this, the lobby suddenly fell into a deathly silence.

Pan Jitao and Xiong Enzheng are not fools, they know very well that the method of river control that Pan Jitao is currently using lies in what Su Hao said. When Pan Jitao first proposed the strategy of "harnessing water and flushing sand", he thought very happily, thinking that the water of the Huai River could wash the sediment of the Yellow River all the way to the sea. In fact, the water potential of the Yellow River is very large, while the water potential of the Huai River is relatively weak, which is not enough to completely dilute the water of the Yellow River, and the effect of restraining the water and washing away the sand is very limited.

When Pan Jitao first arrived in Huai'an, he presided over the Gaojiayan Dam that raised Hongze Lake, so that the water level of Hongze Lake was higher than that of the Yellow River, forming a drop for sand washing. But a few years later, as the Yellow River elevated, the gap between the two disappeared. In order to continue the strategy of confined water and sand flushing, Pan Jitao had to continue to raise the Gaojiayan dam. Anyone with a discerning eye can see that this is a vicious circle, and one day, this strategy will not be sustainable.

Unlike what Su Hao said, Pan Jitao is not without foresight, and he also knows the problem with this plan. But at his age, he was no longer able to come up with a longer-term strategy. As a 70-year-old man, Pan Jitao knows that his days are numbered, if he proposes some strategies that will take ten or twenty years to be effective, who can implement it?

"Su Hao, what do you think about the river?" Pan Jitao was silent for a while, and then slowly spoke. Unlike the previous arrogance, this time, there was a little more sincerity in his tone. Su Hao dared to contradict Pan Jitao, which shows that he is not a speculative camper. He was able to name the flaws of the strategy of bunching water and rushing sand, which shows that he is not a person who does not know how to learn. Since these two shortcomings do not exist, Pan Jitao naturally thinks a little higher about Su Hao.

Pan Jitao put down his figure, and Su Hao became modest, and he said: "Xiaguan has just participated in river affairs, and he doesn't have any high opinions on river governance. There are a few foolish opinions about doing things behind closed doors. If Pan Gong does not give up, please allow the lower officials to speak out. ”

"Say it." Pan Ji tamed.

Su Hao said: "The lower official thinks that the matter of governing the river is divided into two steps: immediate and long-term, and the lower official will talk about the long-term thing first." In the long run, the river should be governed from the root. The sediment of the Yellow River comes from the loop, and the loop will have sediment into the river. The reason is that years of reclamation have destroyed vegetation, resulting in a lack of sediment restraint, and when it rains, turbidity flows into the Yellow River. In order for the Yellow River to become clear, it is necessary to restore the vegetation in the Loop. It is strictly forbidden to return farmland to forests and grasslands, and it is strictly forbidden to cut down firewood. ”

"In the past few decades, the water has not quenched the thirst of the near, how can my generation wait?" Xiong Enzheng said.

Su Hao looked at Pan Jitao. said: "It has been 25 years since Pan Gong first began to govern the river. If Pan Gong had been able to propose a plan to restore vegetation in the Hetao, 25 years later, it would have been effective. It has been more than 200 years since the Ming Dynasty opened, if we could have considered this matter 200 years ago, we can now see a river of clear water, how can we suffer from this disaster?"

Su Hao said this, Pan Jitao actually thought about it. He managed the river for many years. Of course, the problem of sediment in the upper reaches of the Yellow River was considered. However, his past thoughts were that he felt that distant water could not quench his thirst in the near future, and he always thought about waiting for the immediate matter to be solved, and then thinking about the long-term thing. Now hearing Su Hao say this, he suddenly felt a little remorse in his heart. Yes, if 25 years ago when he first took on the task of river control. It will be possible to promote soil and water conservation in the middle reaches of the Yellow River, and in 25 years, if not to completely solve the problem, at least the problem can be alleviated to a certain extent.

Come to think of it. Pan Jitao raised his head and said to Xiong Enzheng: "Guangping, you write down the evil of Master Su and write it down as a memo, I want to ask the Holy Lord to restrict the cultivation and felling of land in the Hetao area." My generation can't see the Yellow River becoming clear, but if we follow Su Hao's method, maybe our children and grandchildren will really be able to see the day when the Yellow River becomes clear. ”

Xiong Enzheng nodded hurriedly and sat aside to record. Pan Jitao turned his head and looked at Su Hao, and suddenly as if he remembered something, he pointed to the chair on the side and said, "Su Hao, sit down and talk."

"Xie Pangong." Su Hao bowed slightly to Pan Jitao and sat down on the chair beside him. After he came in, he talked so much to Pan Jitao, and finally won the right to sit down and speak, which shows that Pan Jitao's disgust with him has been eliminated and he has begun to appreciate him a little.

"The long-term plan you just said, the old man thinks it makes a lot of sense. What, then, do you have to say about what is in front of you?" Pan Jitao also moved his butt to make himself sit more comfortably, it seemed that he wanted to have a long talk with Su Hao.

Su Hao said: "Under the current circumstances, the sedimentation of the Yellow River is unavoidable. Although the strategy of resinfusion can alleviate sediment deposition, it cannot cure the root cause, and the Yellow River will continue to rise. We are now using the method of raising the levee to prevent the Yellow River from overflowing, but it is only a stopgap measure, and when the levee cannot be raised again, the Yellow River will still be diverted. In the opinion of the following officials, since the Yellow River is destined to be diverted, why can't we allow it to be diverted regularly?"

Hearing Su Hao's words, Xiong Enzheng's head raised again, and he instinctively wanted to refute a few more words, but seeing that Pan Jitao didn't have a strong reaction, he had no choice but to swallow the words back. Su Hao's previous evil was all swearing, and after saying it, there was indeed some truth, Xiong Enzheng figured it out, and before he understood Su Hao's truth, it was better not to talk nonsense.

Su Hao waited for a few seconds, and saw that Pan Jitao and Xiong Enzheng were silent, so he smiled self-deprecatingly, and then said: "Xia Guan knows that this idea is too shocking. The lower officials did not mean to allow the Yellow River to overflow, but to prepare a river course for the Yellow River in advance before it overflowed, and then let it divert its course and pass through this designated channel, so that no disaster would occur.

The Yellow River is raised by an average of three inches a year, and we will build a new river channel for a period of 30 years, and when it is raised by about one zhang, we will open up a new river, so that the pressure on us to control the river will be much smaller. ”

"But do you know how much fertile land it takes to open another river?" Pan Jitao asked.

Su Hao asked rhetorically: "Pan Gong, Huai'an Mansion has been flooded for two consecutive years, how much fertile land can be left?"

Pan Jitao was dumb all of a sudden, and he saw the floods in the past two years. When the flood came, many fertile fields were destroyed. This loss is much greater than what Su Hao said about opening another channel for the Yellow River. There is such a pattern in people's thinking, and they always feel that the losses caused by disasters are inevitable, and artificially occupying farmland is a great rebellion.

The plan proposed by Su Hao belongs to the idea of breaking the jar and breaking it. Or the lesser of two evils. According to this plan, artificially creating a diversion of the Yellow River every 30 years can ensure peace for at least 30 years, which is actually a constant idea.

In fact, in the war-torn years before the Ming Dynasty, there was no strong government that could manage the river. The Yellow River solves the problem of rising riverbeds through irregular diversions. With each diversion, the Yellow River can be tamed for a number of years, and when the riverbed re-silts up above the surrounding fields, it is diverted again, equivalent to the system being cleared.

When the Ming Dynasty government governed the Yellow River, it did not dare to use such a method because the fields on both sides of the Yellow River were owned. A government cannot simply allow the Yellow River to be diverted to flood these owner-owned fields. But now, Huai'an, in the lower reaches of the Yellow River, is plagued by frequent floods, and it is really unnecessary to insist on the dogma of not occupying farmland.

"In your opinion, should we abandon this river now and make a new one?" Pan Jitao asked.

Su Hao shook his head and said, "The Yellow River is not too high now, and it is not too late to wait for 10 years to open a new river and divert it." The meaning of the lower official. It is a strategy that no longer needs to use water to flush the sand, and it is enough to let the river rise. If we give up the water and sand washing, we don't need to raise the Gaojiayan again, so that Sizhou and Fengyang upstream will not suffer from flooding. ”

"Raising Gaojiayan is not just for sand washing. The Yellow River seized the Huai River into the sea, blocking the Huai River's access to the sea. If the Gaojiayan is not raised, the Huai River will flood. And what should we do?" Xiong Enzheng finally found a reason to refute Su Hao.

The difficulty in harnessing the river lies in the fact that it must not only consider the problem of the Yellow River, but also take into account the problem of the Huai River. The Yellow River flows into the sea, and the high bed of the Yellow River is like a wall. Blocking the passage of the Huai River from west to east, the water of the Huai River is trapped in Hongze Lake and cannot be discharged, which will inevitably cause harm to the surrounding area. Pan Ji tamed the Gaojiayan to raise the water level of Hongze Lake and surpass the riverbed of the Yellow River, so that the water of the Huai River could surpass the Yellow River and flow into the sea. Su Hao opposes the construction of Gaojiayan, so how can he solve the problem of underwater discharge of the Huai River.

Su Hao dared to put forward this plan, and he was naturally confident. At the time of Su Hao's travel, China was building a major project called the South-to-North Water Diversion, which would divert water from the Yangtze River to the north. In the South-to-North Water Diversion Project, the issue of how to divert water across the Yellow River bed is involved. In later generations, the solution to this problem was to open a group of culverts under the Yellow River, so that the Yangtze River water could pass through the bottom of the Yellow River to form a three-dimensional crossing.

Su Hao was inspired by this project, and he thought, since the Huai River water cannot flow above the Yellow River, why can't it flow under the Yellow River bed?

"Let the water of the Huai River flow under the Yellow River?" Pan Jitao and Xiong Enzheng were stunned, this method sounded so ingenious, but it felt incredible.

"It's very simple, as long as a few large culverts are opened under the riverbed of the Yellow River to connect Hongze Lake with the downstream Huai River channel, the problem of the Huai River being discharged into the sea will be solved." Su Hao said lightly.

"What if a culvert is built under the riverbed, or if the culvert collapses?" Pan Jitao asked.

Su Hao said: "Since the culvert is to be repaired, naturally it can't be allowed to collapse." As long as the quality of the project is passed, how can it collapse?"

"In order for the culvert not to collapse, the wall of the cave had to be built with stones to resist the perennial erosion of the river. In addition, the stone must be tightly built and not leak, otherwise the water will seep into the cracks of the stone and still cause the soil outside the cave wall to drain. To do this, the difficulty of this project is unimaginable. Xiong Enzheng said with a frown.

"The bear experience is really experienced, and I admire it to the end." Su Hao complimented Xiong Enzheng. Xiong Enzheng was able to say this, which shows that he has seriously considered Su Hao's plan, and he also has experience in water conservancy projects. To build a group of culverts under the Yellow River bed, the most difficult is indeed the problem of culvert seepage. This problem was difficult to solve back then, but with the golden finger brought by Su Hao, a traverser, this problem is no longer a problem.

"Pan Gong, when Xia Guan was building a reservoir in Fengcheng, he used a material called cement. This material is in powder form, mixed with water, similar to yellow clay, and can be made into any shape, and can also be used to plug the gaps in masonry. But when it dries, it is as hard as a stone, and it is washed away by the water. Xia Guan thought that with this kind of cement, it would be easy to build a culvert through the river. Su Hao smiled and showed his secret weapon to Pan Jitao. (To be continued.) You are welcome to come to the starting point to vote for recommendation votes and monthly passes. For mobile phone users, please go to read