Escape the Library

【Lucid waters and lush mountains-02】

At 14:00 in the afternoon, it was dark in front of everyone at the same time, and immediately after, they appeared in the examination room of the second course of the School of Environment, "Green Waters and Green Mountains".

As soon as they entered the examination room, everyone was almost unable to open their eyes due to the blowing sand.

Yuexing Wentian wanted to speak, but he ate a mouthful of sand, and while spitting sand beside him, he quickly typed on the research group channel: "Is the School of Environment struggling with sandstorms? It's this kind of weather again! "

Lin Manluo looked around and said, "Unlike the previous class, this is not an apocalyptic environment, and the sandstorm seems to be temporary. It may be over in two days."

She turned around and pointed to a small town not far away: "The towns near the desert are easily affected by the desertification of the land. Once the wind blows, this kind of sandstorm will form. I have seen it in reality. "

Liu Zhaoqing complained: "The exam requires us to protect against wind and sand, but no props are given to us?"

As soon as the voice fell, a prompt popped up in the upper right corner: "The exam begins, the windbreak and sand fixing area is 500 meters ahead. Please allocate the funds in your hand reasonably and purchase the required props. Note: The wrong purchase cannot be returned. If this desertified land is managed within 1 year, the time will pass faster during the exam, 1 hour = 1 day.”

The "Cell" course of the Academy of Biological Sciences also accelerated the time speed. Babies who were originally born in 10 months of pregnancy were produced in only ten hours. Today, the time of this course is faster, 1 hour = 1 day, and the governance is completed within one year, which is 365 hours of examination time.

Jiang Pingce whispered: "365 hours, about 15 days, to complete the work of windbreak and sand fixation, this is not small."

Ke Shaobin said: "If 1 hour is equal to 1 day, if we sleep for 7 hours at night, that means 7 days have passed? What if all the saplings we planted died when we woke up in the morning!"

Time passes faster, and every hour counts. Yue Xingwen thought for a moment and said, "We are 12 people, divided into 3 groups, on duty 24 hours a day, and we can't sleep all over."

Xu Yishen rubbed his temples helplessly: "It seems that we have to build a base again. Everyone's food and accommodation are on the front line. If something happens, we can deal with it in time."

Lin Manluo said simply: "Let's go, go to see the venue first, and then sum up what you want to buy."

Everyone followed the course prompts to the area 500 meters ahead.

There is an endless desert in the distance. The area where they need windbreak and sand fixation is located at the junction of the desert and farmland. It can be seen that some farmland has been covered by sand, and quicksand is gradually invading. The problem of land desertification is very serious. The desert will spread inch by inch, eventually affecting the towns inhabited by humans ahead.

The so-called windbreak and sand fixation is to prevent quicksand from invading forward and ensure that human arable land is not affected by sand and dust.

A big sign was erected not far ahead, which read: "Lucid waters and lush mountains are invaluable assets."

Ke Shaobin pointed at the sign, not knowing whether to laugh or cry: "The courses in the library really keep up with current events! The tourist resort in our hometown also has such a sign."

Liu Zhaoqing said, "We also have them in our hometown."

Lan Yarong said: "In my house, the highway is full of slogans like this."

If it weren't for the library, everyone would even have the illusion that they had traveled back to the front line of environmental transformation in reality.

Lin Manluo asked, "Xingwen, let's see how much money was given to us this time?"

Yue Xingwen opened the research group channel and entered the word "funding", and a message popped up soon: "This course, the 183 research group received a special rectification fund of 100,000 yuan, which can be used freely, and the remaining money cannot be exchanged for points and cannot be brought out of the exam room."

Everyone was slightly relieved to see so much money.

Yue Xing Wen said: "Well, take out 1,000 yuan, Ke Shaobin Xinyan, Qin Lu and Qin Miao go to a nearby town to buy back 15 days' worth of food at one time, including instant noodles, pickles and other staple foods, which are easy to store. Yes, you can handle the rest."

The four received the money and immediately set off to buy things.

This world is not the doomsday of the environment. Judging from the surrounding farmland, although the lives of the residents of the small town have been affected, they have not yet reached the point where they cannot survive. There should be no robbery gangs.

So Yue Xingwen was very relieved to send a team of 4 people to buy food.

He followed closely and said, "Xiao Nian is looking for a nearby place to build a base, and Senior Brother Liu and Senior Brother Xu will help."

Zhang Xiaonian immediately summoned the excavator to work.

The rest discussed the next plan, Yue Xingwen said: "Senior sister, I have popped up a mall here, I shared it on the research group channel, you can see what we need to buy."

Research group channel: "Yue Xingwen shared [Mall Connection]"

Everyone opened it and saw that it was like a mall in an online game. There was a dazzling array of goods in it, all of which were marked with prices, and they were all related to windbreak and sand fixation.

For example, tool excavators are 10,000 yuan, asphalt is 100 yuan/barrel, barbed wire is 10 yuan/square meter, wooden stakes are 1 yuan/piece... and plant reeds are 1 yuan/jin, fences are 0.5 yuan/meter, jujube, The saplings of sea buckthorn, Salix, Artemisia and other plants are all listed for less than 10 yuan.

Yue Xingwen has a headache looking at it, and laymen don't know what to do.

Lin Manluo was also a little dizzy. She looked through the store from beginning to end. There were hundreds of plants listed alone. Although it was cheap to buy, if you bought the wrong one and planted it and couldn't live, then they would be working in vain.

To choose the most suitable plant among so many plants, it is also necessary to adapt to local conditions.

Yue Xingwen turned to look at Lin Manluo: "With the junior junior brother from the School of Architecture, we can save the money for machinery. I will give you all the funds for the rest, and you can decide."

As a layman, Yue Xingwen never points fingers in areas where he is not good at. Lin Manluo is the only one in the team who understands this knowledge. She thought about it for a moment and said, "In a year, in theory, we have a chance to fail the first attempt and try again, but I still want to succeed the first time."

She paused and said seriously: "There are usually three types of windbreak and sand fixation projects. The first is physical engineering, which is to increase the movement resistance of quicksand. For example, in the area where the soil may be invaded, a circle of sand Barriers, fences, walls, etc., to block the quicksand and continue to move forward, this project is also the easiest to succeed.”

Yue Xingwen nodded: "When Xiaonian is here, we can dig a ditch with an excavator as an isolation belt, and then we build walls or fences to block the flow of sand and dust. Is this what you mean?"

Lin Manluo said with a smile, "Yes. But it's just a temporary solution, not the root cause."

Zhuo Feng said, "That's right, physical engineering can only hold back the sand, and has no effect on the desertification itself. What are the other two you're talking about?"

Lin Manluo said: "There are also chemical engineering and plant engineering. For chemical engineering, we need to use some chemical materials to build a solid structure layer on the surface to improve the properties of sandification, spray chemical reinforcement agents, or use chemicals specially designed to improve quicksand. Agents. Bitumen compounds, for example, are commonly used in chemical engineering."

Everyone thought that asphalt was used for road construction. It appeared in the mall, and Yue Xingwen was still a little puzzled. Now that he heard Lin Manluo's explanation, he understood. Those quicksands float on the surface, and when the wind blows, they can easily spread forward. If they are sealed with asphalt, will they not be able to blow?

Lin Manluo followed up: "The most important thing is plant engineering, planting a large number of plants that can survive in sandy soil, because the roots of plants will penetrate deeply into the soil, which can prevent the continuous spread of quicksand on the surface. At the same time, the plant's Existence can improve the ecological environment on a large scale and slow down the wind speed, which can be said to be a means of 'combining prevention and control'."

Yue Xingwen looked at Lin Manluo's serious face when she talked about her professional knowledge, and couldn't help but said, "If we don't have teammates from the Environmental Academy in this class, we will be blind. Senior sister, you are the director of this project. We listen to you."

Lin Manluo said with a smile, "I'm also a rookie. I only know some theoretical knowledge, but I have never practiced it."

Zhuo Feng said, "It's better than what we don't understand theories!"

Lin Manluo simply nodded: "Okay, I'll try."

Jiang Pingce suggested: "365 days is still plenty of time, but we can't just mess around blindly. I suggest to make a detailed plan, divide it into several stages to complete the task, and consolidate the results step by step."

Lin Manluo smiled and looked at Jiang Pingce: "Pingce said it well! Since it is an engineering project, there must be a plan. The windbreak and sand fixation must be divided into several stages, including closing the sand surface for activities, fixing the surface layer, setting up sand barriers, Drain the accumulated quicksand, and finally carry out plant engineering to improve the ecological environment.”

She thought about it carefully, opened the mall list and glanced at it, and said, "To seal and fix the quicksand, I want to spray asphalt directly to make a protective shell on the surface of the land. This is the easiest and fastest way. The area is quite large, and if it is spread with straw and wheat straw, if it is blown away, it will be a waste.”

A group of laymen nodded in agreement.

They didn't know how to fix sand, and they never thought that asphalt could fix sand.

Lin Manluo took another look at the prices of the plants in the mall: "As for the sand barriers, we use the cheapest fences to build them, and let the children dig a circle of holes to build fence walls, and then reinforce them with wooden stakes at intervals to prevent fence walls. Blown down by the wind. I looked at the price of the mall fence and it doesn't cost much to do a lap."

The key is the planted plants. Lin Manluo finally chose sea buckthorn after considering price and growth resilience.

Lin Manluo said: "The seedlings of sea buckthorn are relatively cheap. Moreover, this plant is resistant to drought and sandstorms, and can survive in harsh saline-alkali land. The fruit is rich in nutrients and can be eaten directly or used to squeeze juice."

Yue Xingwen smiled and said, "Xiao Ke must like it very much, but I wonder if we can wait for the day when the sea buckthorn bears fruit."

Lin Manluo said: "It should be possible, right? The mall sells saplings. As long as you can plant them, as long as you can survive, when the season comes, you can eat the fruit."

When everyone heard this, they were full of enthusiasm.

Planting trees, they used to only plant one or two on the annual Arbor Day, symbolically following the activities organized by the school. This time, it is of great significance for 12 people to personally participate in the environmental improvement project.

After a while, Ke Shaobin's group of four came back and bought a lot of instant noodles with different flavors, several boxes of milk, and several boxes of pickles, dried meat, dried fruits and other snacks, enough for them to eat for 15 days.

Zhang Xiaonian's underground base was also quickly built.

Yue Xingwen greeted everyone: "Next, we have to eat and live here, put things away first. Time is very tight, from now on, we are the 183 tree species team, everyone listens to Senior Sister Lin's command and divides the work. Bar!"