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Badain Jaran Desert, located in the Alxa League in the west of the Inner Mongolia Autonomous Region of the Yanhuang Continent, with a total area of 49,200 square kilometers, is the third largest desert in Yanhuang and the fourth largest in the world. It is located in the westerly circulation zone, the north wind blows strongly, the maximum wind speed is as high as 9 m/s, the rainfall is less than 40 mm per year, and the evaporation is more than 4000 mm, which can be said to be one of the driest areas in the Yanhuang Continent.

At this time, Wang Fan was driving the aircraft to hover at a low speed over the desert.

"This is the Badain Jaran Desert?" Wang Fan looked at the scene on the screen and asked suspiciously.

"It's hard to imagine that in the depths of the Badain Jaran Desert, there are many lakes, and according to later statistics, there are as many as 113 in total." Yadi replied in Wang Fan's brain.

"According to the data, the annual rainfall here is less than 40 mm, and the evaporation is more than 4,000 mm, it should be a forbidden area of life, how can it be ......" Wang Fan focused his eyes on those lakes, only to see there reeds, water birds playing, fish flying shallow bottom, a scene of "Mobei Jiangnan".

"According to the results of your later generations, those geoscientists have found that the interior of the tall sand mountains on the ground is actually cháo wet, with a volume moisture content of 2% to 20%. Some dunes are as small as 20 centimeters below the surface of the dunes. Water seeps out can be observed by digging a 1-meter-deep well on the hillside next to the sand mountain, but this well is 17 meters above the surface of the nearby lake! Yadi added.

"The world is wonderful!"

"It's wonderful, but it's more practical and practical!"

"Oh? Why, even if cháo gas is discovered, it can't be used for farming? Wang Fan has the impression that these sand dunes are used for other purposes than making building materials and building houses.

"The main function of the cháo gas is to hold the sand mountain in place, so that it can resist the erosion of strong northwesterly winds. In other words, it acts as a binder, and is an effective means to prevent the spread of desertification. Yadi replied.

"Yadi, you said that if I use the ring to take away all these sand dunes, will I solve the desert problem for the country once and for all?" Wang Fan asked suddenly.

"Take it all? This may not be the best approach, and it may do more harm than good! ”

"Why?"

"Because the desert in the northwest of your motherland is formed for a variety of reasons, and there are several major factors, such as the destruction of vegetation, reduced rainfall, climate change, and a huge source of desert materials!"

"Desert material sources? What's that? Wang Fan heard the unfamiliar words and asked.

"To put it simply, it is the fine-grained material in various sediments, such as the sand source of the Taklamakan Desert is paleofluvial alluvium; The source of sand in the Tengger Desert is ancient and modern alluvial and lacustrine deposits; The source of the sand dunes in the highlands of central and western Ordos is the remnants of bedrock weathering. Yadi explained.

"What if I take all of this?"

"Then there will only be giant blocks of foundation stone on the surface, and although there is no sand, there is also no soil, and there is still no way for people to survive on it."

"But I heard there's water under the sand?"

"Well, yes, yes, but either the water is stored in the middle of the giant cornerstone block, or there is a break that leads to the underground river. Of course, the oil of the Tarim Basin is the same as the first principle. ”

"So, you mean we have nothing to do with the desert?" Wang Fan asked without giving up.

"Actually, you want to deviate, you take away the desert, reduce the desertification expansion caused by the movement of the sand dunes, the idea is good, but to master the goodness, just take away the high sand dunes and the surface sand."

"And then?"

"In the future, your main plane actually has a variety of relatively mature sand control technologies, and the reason why it has not been carried out on a large scale is that the cost factor is too large; The other is that it has not been forced to that part, think about it, one side of its land area is desert, so it has to spend money desperately and govern it carefully, and as a result, it has persisted for decades, not only solving the problem of self-sufficiency in its own food, but also exporting a large number of high-quality seeds and agricultural products overseas, becoming one of the three pillars of the domestic economy. And sè also has the world's most advanced micro irrigation and drip irrigation technology, its domestic Netafim company is the world's largest drip irrigation system provider, as early as 1965 developed the first generation of drip irrigation technology, by 2012, has been updated to the fourth generation, the production of more than 20 billion drippers, covering more than 70 countries, not to mention profits. ”

"Sounds great, but haven't we already promoted drip irrigation technology in the west?"

"Because the farmland in the northwest is arid, it is much better than the desert, so if you really want to do a lot of greening in the desert, it is recommended that you go to the place where you are listed and get their production line. If it is used in desert areas, one is strong sunlight exposure, which is easy to make the rubber tube aging and bursting, and secondly, a large amount of fine sand and dust is extremely easy to block the drip mouth. According to the information I found on your Internet, later generations of people installed a filter cartridge in the drip irrigation line, a plastic multi-tooth element, and when the water flows through the filter cartridge, it creates a vortex that discards the dust particles in it and prevents the narrow dripper outlet from being blocked. And the whole drip irrigation system uses computer monitoring to save manpower and inefficient investigation, so as to monitor the status of water and fertilizer in each farmland at all times, and there are temperature sensors buried in the ground to provide soil moisture and other information, which is very complete and mature. Of course, if you plan to control the desert and put all these things in place, then you need a considerable level of talent to cooperate and maintain it before you can implement it. ”

"It's a talent again, ah~~~~~ as soon as I hear this word recently, my head hurts, why can't the plane ring carry living creatures, I kidnapped tens of thousands of experts, and it was all solved!" Wang Fan grabbed his hair vigorously and said firmly.

"Hehe, I'm sorry, I can't help this, after all, the creation of the plane ring itself is an unexplainable thing, and it directly involves the theological question of whether the 'plane god' exists."

"Okay, okay, Yadi, can you tell me if there is a technology or method that the Yanhuang people can use on the target plane now?"

"Well, yes, but it's quite labor-intensive."

"You said, I am short of any type of talent now, that is, extremely rich and empty labor force with no strength to work."

"Well, the practical way is to cover the sand fixation with the board and artificially plant desert vegetation!"

"Hardboard covered with sand?"

"To put it bluntly, it is very simple, that is, some materials, such as straw, are crushed and additives are added to make hollow pipes, and then they are connected in series with cable rods and fixed in the sand with anchor piles, which are arranged into regular geometric grids, and at the same time, combined with artificial planting of desert vegetation between the grids, much like the grid green belt on both sides of the highway."

"But how to solve the water source of those green plants?"

"Hardboard mulching can turn ineffective rainfall into effective rainfall, intensively reduce a certain area of rainfall to a point, and then infiltrate into the sand layer under the board to preserve, so as to ensure the need for plant water, according to the information of later generations, sowing desert green plant seeds in the holes on these hardboards, can reduce rainwater evaporation by more than 90%, and the preserved water is enough to meet the needs of the lawn itself, if it is properly matched with drip irrigation technology, planting some trees that prefer dry environments, after a period of prohibition of grazing, forming a large area' Savanna' effect, it can basically eradicate desertification. ”

"Not bad, not bad! There is still some hope for this, and I will ask some desert experts from the main plane to refine and decompose the project, design specific implementation steps, and then we are putting it into practice. Wang Fan listened for a long time, finally nodded and shouted happily.

"Actually, Wang Fan, using your plane ring, you can complete some projects that can't be completed under normal circumstances, such as the 'Underground Dark River' and 'Artificial Tianhe' projects!"

"Underground river? Artificial Tianhe? What are they? ”

"En~~, have you ever heard of the 'Red Flag Canal'?"

"Haha, I really know this, are you talking about the Red Flag Canal in Linxian County? Ordinary people are afraid that because of the age, they will not have the opportunity to contact at all. I once had a college classmate whose hometown was next to the Hongqi Canal, so I saw it. It's really impressive. Its location can really be said to be high mountain and water risk, the whole Hongqi Canal hangs on the cliff of Taihang Mountain, the Hongqi Canal of eight meters wide passes through the mountain, it is said that for it, it has been dry for ten years, digging holes in the mountains, building bridges in ditches, leveling 1250 mountains, erecting 151 aqueducts, digging 211 tunnels, building 12408 buildings of various kinds, if the earth and stone barrier built to build it into a wall of 2 meters high and 3 meters wide, it can run through the north and south of the motherland, connect Guangzhou and Harbin. So it is known as a miracle project! ”

"Yes, but because of the limit of manpower, the entire Hongqi Canal still has a lot of defects, such as calling it a canal, you can know that it is not too wide, and it is a surface building, so 45% of the water flowing through it every year will be evaporated, which is both waste and inefficient."

"Then what do you mean by 'artificial Tianhe' just now?"

"Of course, it's 'xīzàng big tunnel project', this is cool enough, and the word 'Tianhe' is right!" Yadi said excitedly: "In the upper reaches of the Yarlung Zangbo River, in the Katse region of Xie Tongmen County (3836 meters above sea level) to build a large reservoir, with the Three Gorges interception method, build a high dam, after the water storage is 4200 meters high, and then under the Karamilan Pass of the Xie Tongmen Reservoir to Kunlun Mountain, nearly 780 kilometers of tunnel line, a total of 18 shafts are dug every 40 kilometers, because the water elevation of the tunnel is 4350 meters, the water elevation is 4000 meters, and there is a slope of 350 meters. The tunnels and shafts run through the northern Tibetan plateau at an altitude of more than 4,000 meters, and then eventually transport the boiling water to the dry and water-scarce Tarim Basin of Xīnjiāng, where the average elevation is 1,000 meters, with a drop of 3,350 meters. ”

"Think about it, if these tunnels are built (the tunnels can be arranged parallel to each other), the total annual water transfer can reach 30 billion cubic meters (about one-fifth of the total amount of the Yarlung Zangbo River, and its total volume is 140 billion cubic meters), the installed capacity can reach 40 million kilowatts, and the annual power generation capacity will reach more than 200 billion kilowatts. Once successful, the Tarim Basin will immediately have 800 million acres of oases, making your country's arable land area the largest in Asia. ”

"You're too optimistic, it's a desert!" Wang Fan thought of turning the yellow-orange-orange sand into a black-brown land, and felt that it was a little unrealistic.

"It's still very possible, don't forget that the Tarim Basin has green mountains in the west, the Tianshan Mountains in the north, and the tall Kunlun Mountains in the south as a barrier, only the eastern and northern Junggar basins are lower, and the northwest and northeast winds blow in the basin all year round. Therefore, after the water input from the Xīzàng Tunnel is evaporated by irrigation, it is difficult to blow through the Kunlun Mountains, which are more than 7,000 meters high, and only part of the water vapor is blown to the Gansu-Shaanxi area of Qinghai, so naturally the vast majority of the water vapor is gathered over the Tarim Basin, and then when it is condensed by northwest and northeast winds, it will continue to moisten the Tarim Basin in the form of rain and snowfall. After 30 years of water from the Brahmaputra River, it will accumulate as much as 900 billion cubic meters, making it the largest reservoir in your country. The surrounding mountainous areas are also fertile due to frequent rainfall, and the grass is planted by airplanes, and it is very suitable for human habitation at that time. ”

"And don't forget, the Tarim Basin is at the same latitude as the North China Plain, and the frost-free period is about 200 days a year. Also, after more than ten years of water transportation, the excess water can be diverted to the Hexi Corridor and Inner Mongolia and other places to transform the desertified land and provide water, and the area it benefits will cover half of the entire land area of your country, how cool~~"

"Yadi!"

"Eh?"

"Is it because it's the 'Ya' Ruzangbo River, and your name is 'Ya' Di, so you are so excited?"

"Bastard! you, I wanted to help you, hum, don't say it!! ”

"Don't, don't, I'm just curious, why are you so excited?"

"Excited? No, I just think it's like a project, the others are too pediatric, this kind of scene of changing the world reminds me of the original time when I was mixed in the Xianxia plane, that is called cool, a spell and a seal, moving mountains and reclaiming the sea, changing the world! Tsk, it's really enjoyable~~~ Now Lao Tzu is having a good time, hold your breath~~"

"......" Wang Fan floated by speechlessly.

"But you have a lot of problems, such as immigration, relocation, and so on." Wang Fanli reminded him.

"Big brother, I obey you, is that xīzàng good, is xīzàng good, is xīzàng good with only 1 or 2 people per square kilometer!!"

"No immigration issues?"

"Nonsense! Not only not, but also does not flood arable land (there is no one in the first place), does not pollute the environment, and does not have the problem of sediment accumulation. ”

"Isn't it harmful? Impossible, otherwise why hasn't the construction of the main plane started for a long time? ”

"It's mainly a matter of contention for water, you know, the Brahmaputra River, but it's an important water source for India, and the geopolitical impact is huge. In addition, in plateau construction, the altitude sickness of workers, the cost of material transportation, etc., are difficult to say, and the variables are too great. But you have a plane ring, and the big tunnel project can take years at every turn, and for you, you just need to find a stable rock layer and solve the problem with a wave of your hand. ”

"Well~~ In this way, I have to think about it and ask water conservancy experts, geologists, and biological experts, after all, this is not a trivial matter. By the way, the underground river should be about the same? ”

"Yes, the underground dark river can actually be dried in the main plane, so the resistance is much less, for the lake that suddenly appeared, it is enough for those experts at home and abroad to discuss, plus as long as it is not too excessive, for example, the water of the Brahmaputra River is only intercepted one-fifth to one-tenth, and then other rivers that flow through South Asia, India, Bangladesh, and finally flow into the Indian Ocean are also intercepted about one-tenth, and flow into the place you want to go through the underground dark river, then the impact on the outside world is very small, and they can't catch your pigtails. But for the environmental changes in the entire west, it will be earth-shaking. ”

"Hehe, how do I feel, we seem to have mastered another big 'killing weapon' that 'threatens' the main plane world?"

"Of course, otherwise how much does it matter, hehe!" Yadi Jiān, who is becoming more and more a black-bellied man, said with a smile.

"Hehe, the one who knows me, Yadea, then make the whole world a little crazier!" Wang Fan, who is a black-bellied man, is also hehele.