Zhangshui originates in the territory of Bingzhou, the upstream is divided into Qingzhang and turbidity, the two rivers merge into the south of Jizhou, after confluence with Weishui, run eastward into the sea, the total length is more than 900 miles, through more than 20 counties in six counties of three states, it is one of the important water systems in the north!

During the Warring States Period, Ximen Leopard took office as Yecheng Order, taking advantage of the opportunity of Hebo to marry a wife, severely punished the local evil forces, and personally inspected the water source, led the people to dig twelve ditches, and irrigated thousands of hectares of fertile land on both sides!

Since then, Yecheng drought and flood to ensure income, no famine year, population growth, the treasury is full, has become the first important town in Jizhou, over time, people only think of the benefits of Zhangshui, and forget the harm of Zhangshui!

"Yecheng - there is a big river in front, there is a Xiongshan Mountain in the back, the Bohai Sea on the left, and Lu Liang on the right, it is really the emperor's house, and the Yuan family is a place of victory according to this, and failed to dominate the world, it is really a loss of yin virtue!"

In the Qingzhou camp - in the Chinese military tent, Xiao Yi sat cross-legged, gathered sand for the mountain, dug the ditch for the river, and pinched the mud pills to shape the city...... I made a pair of Jizhou sand tables, with undulating mountains and cities, and the location is quite accurate!

A few years ago, Xiao Yi accompanied Zhen Mi home to save his relatives, and once lurked into Hebei, and did a detailed investigation of the geographical situation in Jizhou, all of which were well understood, especially the defense of Yecheng, checked inside and outside, and studied repeatedly, hoping to find a little loophole!

But I have to admit that Yecheng - the city is high and deep, the arrow towers are dense, and there is the acropolis to rely on, there is no flaw in the defense, as long as the troops are sufficient, there is no shortage of food and grass, even if it is a million army, it is difficult to break through this city!

Then again, there is no invincible army in the world, and there is no unbroken city, Luoyang, Chang'an, Shouchun, Jincheng...... Haven't all the magnificent cities and strong fortresses fallen, and the lifeblood of Yecheng lies in Zhangshui!

After Yuan Shao occupied Hebei, he spent countless manpower, material resources, and financial resources...... Build your own nest Yecheng, in order to be foolproof, but also specially invited the master of yin and yang, the geographical situation around it, whether there is anything wrong, the answer is: "The dragon vein lurks, the emperor's house, if you meet the lord of the mandate of heaven, it is enough to dominate the world, and then blessings and misfortunes depend on each other, success is also Zhangshui, defeat is also Zhangshui!" ”

Zhangshui is rushing endlessly, irrigating thousands of hectares of fertile land on both sides of the river, raising countless people, and also achieving the prosperity of Yecheng, but also, there is a benefit, there must be a harm, Zhangshui is relatively turbid, carrying a large amount of sediment, the riverbed rises year after year, forming a threat to Yecheng, once the sky rains heavily, the embankments on both sides of the bank collapse, the consequences are unimaginable!

Therefore, when building Yecheng, the foundation was deliberately raised to form a high terrain in the middle and low in the surrounding area, which can prevent flooding and is also conducive to the defense of the city, which can be regarded as killing two birds with one stone!

Yuan Shao also dispatched a large number of craftsmen and people to repair the Zhangshui embankment and twelve diversion canals, and also set up a 'river patrol camp' to inspect the water situation day and night to ensure that nothing goes wrong!

When Yuan Shao was hegemonic, his eldest son Yuan Tan was already an adult, participated in military affairs, and knew the worries of floods, so he camped in the upper reaches of Zhangshui, tightly leaning against the river embankment, one is to sneak attack the rear of Cao's army, echoing Yecheng from afar; The second is to guard the embankment and prevent someone from sabotage, which can be regarded as well-intentioned!

At that time, Yuan Shang was still young, he didn't know these situations, and he didn't have the awareness of waterproofing, after killing the eldest brother Yuan Tan, he took away the people of Qingzhou, which was equivalent to pulling out a safety bolt, plus Jizhou had no floods for a hundred years, and the military generals of Wenchen were also paralyzed, and no one paid attention to Zhangshui!

What Xiao Yi wants to do now is to 'replace the army with water and conquer Yecheng' and complete the great cause of the Northern Expedition, but this matter is easier said than done, and there are two major difficulties:

First: the terrain of the south of Jizhou, high in the northwest and low in the southeast, Yecheng is located on the north bank of Zhangshui, and the Cao army is stationed on the south bank.

Xiao Yi secretly sent people back to the camp and let Cao's army be stationed on the high posts and hillsides, just in case, for fear of drowning his own people, but how to control the flow of water still can't be solved?

Second, Jizhou is the largest state in the world, once a surging flood is released, I don't know how many people drowned, Xiao Yi just wants to break through Yecheng, and doesn't want to harm innocent people!

To be more precise, what Xiao Yi wanted to drown was only the three people of Karasuma, Xianbei, and Liaodong outside the city, and as for the people of the Han family in the city, none of them wanted to be harmed, so they had to control the flow of water and block the gap in time!

Xiao Yi is not an all-rounder, and he does not have a golden finger, there is no problem in planning the court and fighting on the battlefield, but digging a ditch will not work, he must find a water conservancy expert to coordinate the use of water to replace the army, and there happens to be one under him!

……………………………………………………………………

"My subordinates visited Da Sima and summoned him urgently late at night, I don't know what to order?"

A middle-aged man walked into the big tent with a big head, small eyes, and a collapsed nose...... His appearance is very obscene, his clothes are even more sloppy, and his body is full of a strong smell of wine, which is one of the main books in the army - Ding Fei!

Ding Fei, the word Wenhou, a native of Peiguo County, is also a fellow villager of Cao Cao, with a smart mind, exquisite in all directions, once raised filial piety, and is also a water conservancy expert, for the distribution of rivers and the construction of embankments, there are quite some means!

After defecting to Cao Ying, he was appointed as the 'Captain of the Dian Agricultural School', specializing in the management of the military tun and the people's tun, reclaiming wasteland, building water conservancy, and achieving great success, and was also commended by the imperial court, but unfortunately no one is perfect, Ding Fei also has two shortcomings, one is greedy for cups and mistakes, and the other is love to take advantage of small advantages!

During the governance of the military tun, Ding Fei's old illness recurred, and he used a sick cow of his own to steal the strong cattle of the government, which can be regarded as using the public for personal gain, but the enemy reported it, embezzling a cow is not a big deal, it just happens that Prime Minister - Cao Cao rectified the rule of officials, and when he encountered his fellow countrymen breaking the law, he couldn't let it go!

At the same time, because of bullying the royal family and losing the court's festival, Xiao Yi was also imprisoned, the two lived next to each other, and they both liked to drink, and they slowly got acquainted with each other, and they became good friends!

After Xiao Yi was released from prison, he regained the power of the soldiers and horses, thinking that Ding Fei was a talent and would be of great use in the future, so he used a special means to get him out of the prison and appointed him as the chief secretary of the army.

"The battle of the Northern Expedition has reached a critical juncture, Yecheng is not broken for a day, and the soldiers are not extinguished for a day, but the enemy army is fierce, and it is difficult to win hard, I want to replace the soldiers with water, and solve the three divisions of Karasuma, Xianbei, and Liaodong, but unfortunately I encountered a little difficulty, please come and .................. tonight."

Xiao Yat pointed to the sand table, described his big plan, and the two difficulties encountered, and brought out a jar of fine wine and a box of horseshoe gold, if you want the old gluttonous cat to contribute, you must give a little benefit!

"The subordinates were supposed to be sinful, and they got the help of the big Sima, so they were re-employed, and they must do their best to repay the grace of knowing the situation, the water is turbulent, galloping, and it is not easy to guide the direction of the water, and the subordinates remember to ............"

Ding Fei's words were passionate, looking grateful to Dade, and at the same time he picked up the wine and poured a big sip, dragged the box of gold over, and sat directly under the buttocks.

However, experts are experts, talking about the situation of the river, digging embankments and diverting water, it is quite powerful, after a little thought, put forward a solution:

The first is to control the direction of the water flow, according to Ding Fei's knowledge, when Ximen Leopard ruled Ye, a canal was dug upstream, starting from the upper reaches of Zhangshui and going all the way to the west gate of Yecheng, which was used to transport goods, which was very convenient, and it had been used for hundreds of years!

In the early years of the Eastern Han Dynasty, with the accumulation of silt and geographical changes, the canal gradually became difficult to sail, in order to transport goods, people re-excavated a canal in the lower reaches of Zhangshui, and the old canal was completely abandoned, leaving only a dry ditch!

When Ding Fei was young, he once traveled around Kyushu all over the world, checked the trend of mountains and rivers, and also came to the Yecheng area, according to the ancient records, he found the old canal, buried by the wind and sand, it is no longer the same, but the traces are still faintly visible!

As long as the nearby embankment is dug and the flood hits the silt, you can go straight to Yecheng along the old canal road, and you don't have to worry about the water backflow, and more than 100,000 people and horses in Karasuma, Xianbei and Liaodong have become fish and turtles!

The second is to control the flow of floods, only flood the foreign military camps, and not hurt the people of the Han family, which is too difficult to do, water and fire have never been ruthless, how can it be controlled by manpower, unless it is a clairvoyant eye, predicting the cloudy sunny!

Flooding, pouring thousands of miles, it is difficult to check the water situation, unless there is a pair of clairvoyance, looking down at the ground from a high altitude, according to the submerged situation, judge when to block the gap, if you start early, it is difficult to flood the enemy camp, if you start late, Yecheng will be difficult to protect!

As for the time of digging the embankment, just before it was clear, the heavy rain did not stop, the river flooded, and the water was released to destroy the enemy; As soon as the heavy rain stopped, the river level fell, just to plug the gap, so as not to get out of control, the timing must be just right!

The problem is, people have good fortune and misfortune, the sky has unpredictable wind and clouds, who has the ability to predict the clouds, who has a clairvoyant eye, can check the changes in water potential, once the estimate is wrong, can not block the gap, the consequences are unimaginable!

"Huh! --Clairvoyant Vision, predicting clouds and sunny days, there are indeed some difficult things to do, but I can just do it, replace soldiers with water, this plan can be done! ”

After listening to Ding Fei's story, Xiao Yi thought about it for a while, and let out a sneer, he also went to college, and he knew astronomy, geography, and a lot of natural knowledge, and this time he put what he learned into practice!

This chapter is really difficult to write, and it took me six hours to revise it repeatedly...... Shame 1

(End of chapter)