"Does the princess really make them condense and rain when she directs the air upwards? The sky above is colder than the flat ground, we feel that way, but we think it's colder just because it's closer to the sky.

It is said that most of the heat is absorbed by the surface.

And the air that is closer to the sun actually can absorb less energy, so its energy is slowly emitted from the surface, in fact, we really don't understand it very well, and the plan we designed like this will really not be a problem?"

Qian Rujun said, "Am I not helping you watch?"

In fact, Qian Rujun's understanding of meteorology is also on paper, and she has not actually seen how his weather forecasting operates.

But Qian Rujun knows that meteorology has been verified by many predecessors and has developed many forecasting systems.

Therefore, although there are some errors in these truths, the errors are not too large. At least in front of the Han people, these errors are tolerable, because the Han people's requirements for the weather are not so absolute, and the temperature difference is one or two degrees, which has no effect on them.

Most of the time, they just want to know if the temperature will warm up and cool down, and if it will rain.

For them, God is going to rain or not, and they have no part to complain.

When encountering disasters that exceed the tolerance limit, they can only find a way to solve them, or they can beg the heavens.

As for scolding the heavens, maybe they can talk about it, but more often than not, they are afraid of the heavens.

In later generations of scientists, it can be found that in the beginning, scientists were often priests, who studied in order to highlight the existence of gods, and even in the later period, more and more atheist scientists, when his theory is deeper and more in-depth, this scientist will believe in gods more than others.

For ordinary people, he will feel that he already knows most of the knowledge he needs in life, and he has relatively few doubts about life.

But in the eyes of scientists, especially scientists who study the life that can lead to this life, their minds are full of all kinds of doubts, and in their lifetime, they seem to have no way to solve such doubts, so at this time, they will have more ignorance.

The best way to deal with ignorance is to worship the gods.

Explaining everything with gods seems much simpler than researching.

This may be very difficult to understand, for the average ignorant person, who thinks that science can explain everything around him, and on the contrary, leads people to wisdom, will believe in the existence of gods, because in the end, they will find that there are countless problems around them, and there is no way to solve them in their lifetime.

Qian Rujun knew that the students of Xuetang Island were trained by her to become the first batch of scientists in the Han Dynasty, they were smarter than all scientists, and they had more research partners than all scientists.

Because scientific research is not lonely, there is a lot of knowledge, and a person's head cannot fit it.

At this time, he needs different people to provide his opinions, and more people can do wisdom stirring with him, and his research results will become more under the stirring of the wisdom of others.

Even if Qian Rujun did not give them the wisdom of the future generations.

They themselves are often studying some things, although Qian Rujun will feel that the research of these things has come out in later generations, and more advanced research has come out, but Qian Rujun basically encourages them, and will not take out the research of later generations to attack them.

Because letting them know what the results of the research are, in fact, will make them lose the way to open up their thinking, but when Qian Rujun is full of confidence in their research, he will come up with the results to hit them, and these results are often further results.

Of course, most of the students on Xuetangdao put their research results on Qian Rujun, and their idea was that since they had this result, they must understand this achievement and achieve further research.

Their research has never stopped, and if it weren't for the extra tasks given to them by Qian Rujun, in fact, many Xuetang Island students would have become scientists specializing in research fields now.

This time, the direction of the students' research on Gakudo Island tended to be more scientific research, rather than a problem that could be solved by simply controlling water in ancient times, because they wanted to let the wind rise, and let the rising wind condense into rainwater.

Of course, not every wind is a wet wind, but the location chosen by Qian Rujun is still more suitable for condensing and raining after the wind rises.

Because before the wind blows, it passes through the surface of several large lakes.

Although it is not as strong as the water vapor that can be brought by seawater, this site can basically condense and rain as long as the wind blows in.

As for the height of the mountain, under Qian Rujun's calculations, it is actually just right.

Of course, Xuetang Island students may be more conservative in their calculations, and they will be worried about whether they can make clouds and cause rain, but in Qian Rujun's calculations, in fact, although one or two hundred meters will not rain heavily, it can still form thin rain threads, which may be more able to moisten the land and allow crops to grow than heavy rain, and even without diversion of water for irrigation.

It can also make the vegetation in this place grow very well, and Qian Rujun has also studied the topography here, if it rains on the mountain, it is very likely that the groundwater will accumulate under the mountain, and the exit of the groundwater surface may be in the mountain cut into the flat land 100 or 200 meters.

And there will be two outlets, and these outlets are the best places for them to divert water for irrigation, although there is no trace of these outlets in the arid land at this time.

The research of the students of Gakudo Island this time must take a lot of time, and even this project will take a long time.

But Qian Rujun couldn't wait in this place, so after inspecting the terrain outside, all the students of the academy entered the space.

Starting rapid research, Qian Rujun allowed them to solve their doubts on the spot outside every day, and then went into the space to conduct rapid research, because the speed and space of time can save more.

Of course, this kind of speed will make the local officials feel very fast, even beyond the speed of the gods, so they are a little distrustful of the method proposed by the students of Qian Rujun Academy.

Now the first project has not been completed, so Qian Rujun has no way to tell them in kind that these methods are basically effective.

Even if there is no effect, it is good to adjust it afterwards, but fortunately, the water conservancy project in Jinmaicheng has been going on, and they still have some confidence in the water conservancy project in Jinmaicheng.

The construction of Jinmai City spread farther than imagined among officials.

Another group of students from the academy had already assembled in another place, and Qian Rujun had to rush over.

Qian Rujun is now ready to gather all the students in the academy and enter the space of the academy island at the same time, and she herself works hard to fly around in these places.

The people she guides are basically people who have already participated in major research, and they can quickly bring the new students of the academy island into a familiar state.

For example, Qian Rujun went to some places and found that the water source in this place was very abundant, but the sunlight was relatively strong, so she learned the method of karez to make water sources.

Because if evaporation can be reduced, the amount of water for the local area is actually more, not to mention the use of groundwater, if the amount of groundwater extracted is exceeded, it is actually harmful to the place.

Fortunately, people have not thought of using a motor to pump water, not to mention how many fields are suitable for the water in this place, Qian Rujun has it, and it has been planned in advance.

Of course, this plan was not made by Qian Rujun himself, but by the students of Xuetang Island.

Qian Rujun attaches great importance to this, of course, Qian Rujun's plan is that if the excess water is still discharged to the river, because Qian Rujun knows that when the river can flow longer, the more land can be supplied, and if it is cut off in the upstream, there will be no less water in the downstream, because they tend to have more rainfall.

On the contrary, the upstream water source is relatively insufficient.

The problem is that the reduction in water volume can cause siltation of the riverbed in one place.

Change the local hydrology, and eventually, if there is a large amount of water that wants to flow out, these siltation will cause the river to flow backwards.

Qian Rujun used their time in space research to fly as fast as possible to another place where the students of Xuetang Island gathered, and guided them to start designing the water reservoir project in different environments.

Qian Rujun knew that only five or six hundred people might have been involved in the design of the water reservoir project they designed.

But in the end, we must guide at least one million people to devote themselves to the construction of Shuizhen, and only in this way can Shuizhen be established in Dahan.

And give more people the opportunity to farm.

Looking at Chang'an, Qian Rujun was very hesitant, the use of gunpowder itself was very dangerous.

Gunpowder, for both those who use and manufacture, is not a safe thing.

But gunpowder can also save them a lot of manpower, in fact, when doing the water project, in fact, it may cause casualties, in this era of various tools are very backward, every simple sudden change will make people's lives very threatened.

The more manpower is used, the more difficult it is to control the project.

Maybe I'm going to blow up fewer people than I'm going to hurt in Digging Watertown.

For example, when a river channel is being dug, suddenly the river rushes in and there is a big flood. It will bring a lot of deaths.

For people in this era, big rivers are very big, and floods don't happen when it rains in your area.

The place where the flood occurred may be hundreds of kilometers away, with sudden heavy rain and distant climate change, but not everyone can observe it, at least not the people of the Han Dynasty.

In fact, the meteorological changes they can observe are only more accurate in the vicinity of Chang'an, because the officials of astronomical history and places near Chang'an are actually more cautious in their observation of the earth.

They combine the observation of celestial phenomena with the fortunes of the country, so that people look up to the sky of the capital all the time.

For them, their job is to protect the entire Han Dynasty, so although they don't seem to have done much work, Qin Tianjian has always held a very strong voice in the Han Dynasty.

Because if their words are not good for the Son of Heaven, they may even make officials distrust the Son of Heaven, causing the Son of Heaven to step down.

Although no one dared to do such a thing, when the Son of Heaven made a threat, he had to send a letter of apology to make the people of the world feel at ease.

With such a large amount of work, even if all the output input of Jinmai City is not affordable, why does Qian Rujun ask them locals to do local things, and let more people volunteer to devote themselves to this work, at most they are responsible for food, so that they have something to eat.

In fact, the e-paper book space produces a lot of food.

Every time a section of water is done, in fact, the upstream water tank is done, and the farmland can be opened.

Everyone knows how important water conservancy projects are to the Han Dynasty, but depending on the era of manpower, many people will immediately know that if everyone goes to the water tank, they will indeed have water to drink in the future.

But the people who are Shuizhen have no way to produce food, and the imperial court has no way to distribute enough food to everyone.

At this time, it is the biggest obstacle to them as engineers.

Therefore, they are more inclined to use a bunch of specialized engineering personnel, taking advantage of the slack time of farming, and constantly serving laborers, to cover up the water ditch bit by bit.

But if they cover the water bit by bit, there will be a problem, and floods will occur from time to time, thus destroying their previous achievements.

Therefore, what can be done in a year is often done for decades, but they do not see the effect, the main reason is because there is no way to complete the water at one time, so as to achieve the stability of the water flow, and the water tank must be maintained at any time, and it cannot be separated from people.

Qian Rujun also knew very well that she couldn't do it, and built all the water tanks, but the places she built were all visible to the family, and they were very far away.

In this way, the way of establishing the water and the benefits that can be obtained, from input to output, can be shown in front of more people.

Another characteristic of the Han people is that they will imitate and learn when they see a good thing, even if they can't imitate it to 100 percent, 70 or 80 percent, they will try to do it until the thing can be used.

Of course, this is not without its faults, as the imitations they make rarely surpass the originals, so they will all have some drawbacks.

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