Spring is here, the ice and snow are melting, and everything is revived.

Tucao led fifty new recruits and escorted hundreds of cave tribes to the Heishui River. He found that the city lord had arrived a long time ago and immediately stepped forward to report.

Ye Xuan nodded and tightened his clothes. There were no blue mountains as a barrier here, and he could still feel the sharpness of the north wind.

He raised his hand and pointed to a place and said, "Look at that."

Looking at the slaughter, the place where the city lord pointed was located in the upper reaches of this section of the riverbed, and the river channel was narrower than other locations.

Ye Xuan has never forgotten the Yellow Wolf Clan, who had been burned to death by a large number of tribesmen at the east gate of Heishui City, especially before Tedaer vomited blood and fell into a coma, and the hatred in his eyes that could almost break through the sky.

In the coming year, it is inevitable that Hei Shui City will suffer fierce revenge from the barbarians.

Ye Xuan could imagine that by then, most of the people who led the barbarian troops to revenge would be Tedar.

In a year, even if Hei Shui City was on the Rockets, it would not be the opponent of the giant barbarians.

However, as long as Ye Xuan is given enough time, he is confident that he can fight against the barbarians.

Now, all Ye Xuan has to do is procrastinate.

Every year when the barbarians go south, most of the east ends will use the Heishui City section as the invasion point, and when they return north, they will use this place as the return point.

Why don’t you choose other places but choose here?

Because this section of the riverbed is higher than other river channels, the river surface will drop every year from late autumn to early east, and the river water will barely reach the knee.

Most of the barbarians' combat power comes from horses, and they can easily cross this section of the riverbed.

If you want to fundamentally solve this problem, the only way is to dig the riverbed directly. As long as it is so deep that even the barbarians can't get through riding horses, maybe there is no need to worry about the barbarians going south this year.

Of course, the barbarians are not fools, especially the Yellow Wolf tribe with deep hatred. Tedar will definitely come up with other ways to cross the Black Water River.

But it will definitely not be this year!

The focus of the barbarians going south is on the word "fast", which must be light-fitting.

They may bring bows and arrows, scimitars, or dry food, but they will never bring shovels and other labor tools. Could it be that they can use scimitars to shovel soil and fill the river?

Ye Xuan checked the relevant information of Heishui River and also verified from his subordinates that once this section of the riverbed is dug deep, there are only two ways for the barbarians to cross the river.

First, when you turn west, the other side was the main guide for the barbarians in the past, and the degree of wealth was far beyond the comparison of the east.

Second, continue to go east and find a new crossing point.

However, the river channel behind the Heishui River is somewhat similar to the step-like fall of the Three Gorges Hydropower Station. Not only is the river wider, but the water flow is also more turbulent.

If you want to find a safe crossing point in a short time, and turn around and attack Hei Shui City...

Ye Xuan has to say that the chances of success of the Yellow Wolf Clan are not lacking, but they are quite slim.

Besides, Tedar is a smart person, and smart people will consider the importance of gains and losses.

The purpose of the barbarians going south is to plunder. Once the attack on Heishui City is too long, they will inevitably be in a dilemma.

Once you cannot obtain enough winter resources, let alone the small tribes under the Yellow Wolf tribe, you may even complain about their own tribes!

"The lord of this city plans to build a temporary river dam in that section, and at the same time dig out a canal to divert the flow, joining the streams flowing out of the blue mountains, and directly leading them to the farming area of ​​Heishui City. Even if it encounters a drought year in the future, there is no need to worry about no water to irrigate."

Ye Xuan established a temporary river dam, on the one hand, to dig deep into the riverbed, and on the other hand, to dig a small river channel again. Although it is currently temporarily used for irrigation, it is also a preparation for the future expansion of Heishui City.

In Ye Xuan's plan, the source of water is also classified, roughly divided into three categories: drinking water, domestic water and industrial water.

The water source of this small river comes from the upper reaches of the Heishui River and can be used as domestic water. After a cycle from Heishui City, it flows back into the Heishui River.

The exit of the small river channel must be in the lower reaches of the Heishui River. In the future, all industrial workshops will be relocated. As for pollution issues, I can only say sorry to the province next door.

Regarding drinking water, there is no shortage of Heishui City now. A stream from blue mountains never dry up all year round. There is a well almost every other section of the city. The wealthy families even set up the wellhead at home.

Obviously, there must be an underground river below Heishui City, either a spring source in the blue mountains or an underground branch of the river upstream of Heishui River.

This is a good thing for Hei Shui City!

Unfortunately, with the current technical level, it is impossible to develop the resource of underground rivers.

Ye Xuan also thought that if he could carve a hot spring, wouldn’t life be happy?

"The Industrial Department is currently working hard, and the temporary dam can be completed within five days. You can ask the cave tribe to dig the river according to the planning drawings."

Ye Xuan said, looking back at the cave tribe curiously.

I saw guys with short figures hanging their heads, iron chains tied around their necks, thick hemp ropes tied to their wrists, and dark skin. I almost thought I had seen a reduced version of the black brother in another world.

"You should be familiar with how to make the three hundred mountain tribe warriors work honestly in the past. These cave tribes are very important. Be careful, but don't make any trouble."

"Thank you for your advice!" Tucao nodded heavily when he heard this.

The method of continuation proposed by the city lord was the most suitable way to treat groups like the mountain tribe and the cave tribe.

He only needs to hold the lives of some tribe members in his hands, and the other part will definitely be honest and he will never dare to go west when he goes east.

"Once the river dam is completed, the riverbed must be dug first, not only fast but also stable, and it must be completed before the spring flood comes."

The river dam in Ye Xuan's mouth is just an original method of interception such as high wooden stakes and sandbags.

The water surface is still low now, and it is not much of a problem. However, as the water surface rises, the river dam will definitely not be able to withstand it, especially in the spring flood, when the river dam is no different from tofu.

"City Lord, I promise you that I will complete it as soon as possible!" Tucao said confidently.

"That's good, I'll leave it to you."

Ye Xuan glanced at the weak cave tribes again, and after thinking about it, he said: "In the future, the lord of the city will ask the Ministry of House to transfer another batch of food to let them eat and work hard!"

"I know."

Returning from Heishui River, Ye Xuan led his personal guards to pass by the farming area, and couldn't help but recall the battle with the mountain tribe during the autumn harvest last year.

Now the entire Shanyue Clan is working for the entire Heishui City. Who would have thought that a year ago, the Shanyue Clan had crushed the Heishui City so much that they could not afford to eat a full meal.

Things in the world are changing and unpredictable!

Ye Xuan saw a busy scene in the farming area, and a large group of slaves were sowing seeds under the Agriculture Department.

Just when Ye Xuan was watching with relish, a commotion suddenly appeared in the cultivated land area. It seemed that some slaves were running away, but the direction...

Ye Xuan saw several slaves rushing towards him, and waved his hands and shouted loudly.

"City Lord! City Lord! City Lord!"

"we are……"

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Chapter completed!