Lin 2frog spoke: "Let's not discuss King Nihod's good and evil or good and evil, is this okay now?" ”

Qingxue shook her head and said, "This kind of rain is sometimes heavy and sometimes small. Fortunately, the city is built on a plateau as a whole, in fact, the hills here should be formed by the alluvial rainstorm in ancient times, and we are digging along these ancient waterways. Dig the drainage elevation to the height we need. But the rain is a little bit less now, and it may be heavier later. ”

Holmes said: "I brought out half of the troops in the city, and I will listen to you to fight the flood!" The other half of the troops were evacuating the dungeons and rescuing the dead and wounded. ”

Qingxue pointed to the mountains behind Nihod City and said, "I can understand that King Nihod chose to build a city here because of both offensive and defensive considerations. But the surrounding mountains make your royal city a huge rainfall area. When a rainstorm comes, the soil absorbs water at the beginning, but when the soil moisture content is close to saturation, not only can it no longer accept rainwater, but it also has a certain amount of fluidity, so to solve the hidden danger, we need to move to that side. ”

After a brief meal in the torrential rain, they immediately rushed to the mountains behind the city of King Nihod. The forced march took 39 hours in the rain to reach the intended location.

Although they had seen the King of Nihod from the outside and had also entered the sewers, they had not seen it from the mountains behind them. It turns out that the entire plateau has been developed by King Nihod on a large scale, agricultural area, industrial area, although it is rain, you can see the prosperity of the past.

"Quick! According to the drawings, 19 inverted T-shaped pools were dug up. The end points to the mountain pass. Qingxue only glanced at the elevation map displayed by Lin 2 frogs, and drew a schematic diagram on his chest, and said.

Holmes couldn't understand why and why, so he asked, "Can you explain that?" ”

Qingxue felt that it was not okay not to explain it clearly, and said: "In this way, the rainwater collected here will form a catchment area in that direction, which can divert the hydraulic load of the main city." About 10% of the diversion will be divided. ”

Holmes looked at it and finally understood, and sighed: "Then the crops here are white." Ay. Brothers, hurry up! ”

The number of people was strong, and the excavation was completed in only 3 hours according to the schematic diagram drawn by Qingxue, and then Qingxue quickly let the troops evacuate. This is because the purpose of digging here is to create a converging current, and the hydraulic force is used to form a shock wave of water in the direction of the pass. At the end of the T-shape, there will be a small flow of water, and after the 19 are arranged according to the design of the clear snow, 19 regular rushing currents will be formed, and after 1-2 hours, a synergistic resonance effect can be formed.

Soon the first 19 small T-shapes had disintegrated, forming a huge T-shaped crater, and more water was collected, which reciprocated in the T-shaped crater and continued to extend towards the end of the T-shape. It's as if a wedge is chiseling through the land here and stretching towards the mountain pass. A roar erupted through the pass and a small waterfall was formed.

The whole army was startled by this roar and was at a loss for what to do. Qingxue shouted proudly: "That's what you want!" I've been building water conservancy in Taoyuan for almost 300 years! Go to the next place! ”

Holmes roughly understood that within a large catchment area, it was divided into several small catchment areas, each of which gave an outlet to disperse the pressure on the main city. At the same time, the use of water flow, hydraulics, and resonance to dig flood channels saves labor in general, and most importantly, valuable time!

In this way, Qingxue and Lin 2 frogs took Holmes's troops to dig a piece in the east and a piece in the west.

It wasn't until a soldier came to report that even the water in the lower city had receded, and that the drainage pumping station had been suspended.

All the soldiers, though exhausted, erupted in deafening cheers!

"It's finally over." Qingxue was already lying flat in the muddy water, and she needed to catch her breath and then find a comfortable place to rest.

Next to him were Lin 2 Frog and Holmes were also lying down, panting and looking at the sky!

Lin 2 Frog said: "No matter who it is, our enemies are natural disasters, not each other!" ”

Holmes smiled: "It was supposed to come one day, if you don't surrender, I'm going to lead troops to attack you!" Hey, I can't even remember the days now. ”

Then they parted ways, and Qingxue and Lin 2 Frog were to return to the Pea Forest to see what was going on over there. Holmes, on the other hand, led his troops back to the city to help the people.

On this side of the pea forest, except for the many small rivers that flow constantly and vent the water, the topography has not changed, as if this forest is actually very adaptable to such heavy rains. The huge root system holds the ground firmly, and the rainwater drains down the root system into the underground river when the aquifer is saturated.

Qingxue and they were mainly worried about these 50 companions who were still developing, and although they paid attention to the nutrients in their cultivation pool when they left, after all, several days had passed. They must be hungry.

Qingxue and Lin 2 frogs ran back, feeding their friends while feeding themselves. Plenty of peas are always their best food!

"There seems to be a lot of extreme weather here." After many matters were settled, Qingxue said to Lin 2 frogs.

Lin 2 Frog said: "The earth has actually had its time, such as when natural disasters erupted. It is usually the time of high tide of the outer hydrosphere and the tide of the inner lava caused by the gravitational force. It belongs to the genesis of both geological and astronomical origin. ”

Qingxue said: "I have also experienced a lot, I have been to several planets, in fact, there are many more planets that are completely unable to survive life. I was lucky to be able to. Strife or something, it's stupid. ”

Lin 2 frog said: "Hehe, maybe strife is also an inevitable part of life. It's like scientists who studied dinosaurs before and found that the self-defense methods of dinosaurs were not against natural enemies, but against the same kind. Don't look at the Tyrannosaurus rex's front claws are very short and small, but the strength is enough to break the horns of the triceratops! And those horns are actually against their own kind, whether it is to grab food or mates. ”

Qingxue nodded and said: "Maybe that's the case, when you meet a natural enemy, you will only do it once in a lifetime, and if you meet it, you will basically die." And the fight for a mate several times a year, and the fight for food is more frequent! Many times, although they don't really fight, the two sides show their weapons, stronger than the other, and then the weaker side retreats. It's also a failure to fight for food. ”

Lin 2 frog said: "There have been many subhuman races in the history of human evolution, but none of them have lived until now, and large-scale conflicts and wars have not occurred. It should be like this, the subhuman race was robbed of food by our human ancestors, Homo sapiens. Other races that lack food are malnourished or unable to survive the winter. ”

(End of chapter)