Economy half -hour | Water conservancy construction entrusts the dream of harvesting

Data recently released by the Ministry of Water Conservancy showed that since this year, there have been 19,000 new construction of water conservancy projects in the country, setting a historical record. In the first eight months of this year, the country's investment in water conservancy construction reached 703.6 billion yuan, an increase of 63.9%year -on -year. So, what is the construction of these water conservancy projects? What are the unknown stories behind it?

When the Anning River Irrigation District Project is underway, it is necessary to "build a Dujiangyan"

The Anning River is 337 kilometers in length, which is the largest tributary of the lower left bank of the Yazhen River. The rushing Anning River runs through the southwest of Sichuan from north to south. Eventually, a narrow and long river valley is formed. It is second only to Chengdu in Sichuan Province. The second largest plain in the plain.

Sitting on the valley plain and abundant water resources, if the Anning River Basin wants to be "Tianfu Second Grain", it has always faced the "bottleneck" of uneven watering of water resources. At present, there are 4.94 million mu of irrigation area in Liangshan Prefecture in the Anning River Basin, and the effective irrigation area is less than 50%, which is lower than the national average.

In order to solve the problems that have troubled local agricultural production over the years, the irrigation district project with the source of the Anning River -the Bridge Reservoir as the hub is being promoted in full swing.

At present, the main project of the reservoir and the first phase of the irrigation district has been completed, and the construction of the second phase of the irrigation district has reached the most important juncture. Workers are in the tunnel of more than 300 meters underground to step up excavation operations.

The 12 -kilometer Taihe Tunnel is the control project of the second phase of the bridge reservoir irrigation district, and it is also the most difficult "hard bone". The tunnel needs to cross the four geological fracture bands. The construction staff overcomes the sudden rock explosion and surgery. It is expected that it will be fully connected by the end of next year.

The first phase of the bridge reservoir irrigation area was fully completed in 2008. The water diversion channel was 114.8 kilometers in length, and the irrigation area was 507,600 mu. It rewrite the fate of "eating by the sky" in the Anning River Basin.

Huanglian Village, Xichang City, is the water area of ​​the first phase of the Anning River Bridge Reservoir Irrigation District. Although it continues to be high temperature and rain this year, with a period of project, the steady stream of river water flows along the channel into the thirsty fields, and the yield of rice has also increased from 700 pounds to more than 1,000 pounds.

The second phase of the project is expected to be completed in 2025. With the goal of "reconciled one Dujiangyan", it will further improve the production and living conditions of the Anning River Valley and promote the adjustment of the agricultural industry structure and the development of characteristic agricultural.

Statistics show that since the 18th National Congress of the Communist Party of China, my country has invested a total of about 150 billion yuan for the construction and transformation of the central government for the construction and transformation of the irrigation district. The length of the backbone channels alone has reached 400,000 kilometers, which is equivalent to 10 laps around the earth.

7330 large and medium -sized irrigation areas produced 75%of the country's grain and more than 90%of economic crops, laying a solid foundation for the Chinese rice bowls in their hands.

Sitting on the Great River, why "ten years and nine droughts"

Shigu Town, Lijiang City, Yunnan Province is located on the banks of the Jinsha River on the upper reaches of the Yangtze River. The Jinsha River from the south of the Qinghai -Tibet Plateau has a rapid turn to north, forming the "First Bay of the Yangtze River". The source of water.

Central Yunnan region is one of the most dry areas of my country's drought. The internationally severe water shortage alarm water is 1700 cubic meters per capita, while the per capita water resources in central Yunnan are only 690 cubic meters. , Kunming Dianchi Basin is even only one -tenth of the amount of alert water. This status quo is closely related to Yunnan's unique terrain.

Although Yunnan has the Great River, such as the Golden Shajiang, Lancang River, and Nu River, it is almost completely occupied by the Hengduan Mountains and its extended mountains. The altitude gap between kilometers can be described as "people walk at a high place, and the water flows at a low place."

Zhang Chuanjian, chief engineer of the Central Dynasties Direction Project in the Yangtze River Design Institute

The water drainage project in Central Yunnan is to lead the water at a high place to high. The project includes the construction of the first phase of the water source project and the total water plowing canal construction and the second phase of the supporting project. The total length of the pipeline is more than 2,500 kilometers. Yuxi, Honghe and other 6 states and cities.

The construction tasks of more than 92%of the first phase of the water diversion of the Yunnan Yunnan are underground tunnels. The total length of the tunnel has reached 612 kilometers, and it needs to cross different geological bands. During the excavation of the water tunnel, there will be once every three or five days in the rush of water. If it is not disposed of properly, it may induce sudden mud or even rock body to collapse. In order to solve the technical problems encountered in the water diversion project in central Yunnan, the project department jointly established a simple laboratory in the front line of the project construction. Developed and deployed.

Nie Lichao, head of the pre -geological forecasting project department of Central Yunnan University in Shandong University

In the Xianglang Tunnel tunnel of more than 60 kilometers away from the water source engineering, the full section tunnel excavation machine "Yunling" is being excavated.

The full cross -section tunnel excavator is also called TBM, which can replace the traditional drilling method to achieve the construction of mountain tunnel under complex geological conditions, and continuous operations of excavation, support, slag, and other processes. "Yunling" is a "mountain weapon" tailored based on the geological characteristics of the water diversion project in central Yunnan.

The "Yunling" has a diameter of 9.83 meters, a total length of 235 meters, and a total weight of 2050 tons. It is currently the maximum hard rock excavator independently developed and tested by my country.

More than 600 kilometers of tunnels to be excavated in the first phase of the water drainage project in Central Yunnan need to cross the four major water systems, 43 deep faults, and cross the horizontal crossing mountains known as the "World Geological Museum". "The red floor of the Central Yunnan" "almost includes all underground construction problems, and every little progress in the project needs to overcome the problem.

Although there are many difficulties, the original intention of the front -line builders is to benefit the people along the line through this project. During the construction of the Haidong Tunnel of the Dali Duan section, the drainage water drainned was achieved reasonably. After treatment, it became irrigation water in nearby villages and towns.

Binchuan County, which is separated from the Haidong Tunnel, was a well -known "water -lacking village". The engineering drainage caused by the turning over the mountains from Haidong Tunnel has eased the urgency of the folks.

In the past, people needed to memorize Ma Camel, and now you can open the sluice. The "water -lacking village" attracted valuable water sources. Coupled with local light and soil conditions, the grape planting soon flourished in the village.

At present, the five branches of the Haidong Tunnel can provide 23,000 square meters of purifying engineering pouring water every day, which can meet the production water of about 80%of the village. After the construction of the water diversion project in Central Yunnan, the water pipelines of 36 counties, municipalities, and districts including Lijiang, Dali, Chu Xiong, Kunming, Yuxi, and Honghe, will continue to bring the Golden Sand River into villages and towns that are hoped.

The first phase of the water drainage project in Central Yunnan is 96 months, and the second phase is 70 months. The total investment of the investment exceeds 120 billion yuan. It is currently the largest water conservancy project under construction in my country.

In addition to the construction of central Yunnan water drainage projects, my country has also built 54 cross -basin and cross -regional water adjustment projects in the first phase of the South -to -North Water Diversion Middle East Line Project, the Hanji Weiwei, and the water resource allocation of the Pearl River Delta. , Significantly improve the ability to make coordination of water resources.

The national water conservancy project has increased from 700 billion cubic meters in 2012 to 890 billion cubic meters in 2021. The construction and construction of each project have been silent, injecting the source of living water into the development of the regional economy.

Source: Economy half an hour

- END -