Lanzhou Summer Yellow River is now "Qing" Yan

There is a joke about the Yellow River. "Tourists came to the Yellow River and saw the mother river that had been born in 5,000 years of civilization, and couldn't help groaning: Yellow River, really yellow!" In fact, although the Yellow River is named because of "yellow" "". In the past few days, the reporter observed in the Lanzhou section of the Yellow River that the Yellow River is currently presenting a green scene only in autumn and winter. Compared with the color of the Yellow River at this time in previous years, this Yellow River's sudden "face change" is really rare.

On May 8, 2020, the Yellow River resumed its "color"

What prompted this situation? Feng Zhiliang, deputy director of Lanzhou Water Affairs Bureau, said that the most direct is natural reasons. From January to June this year, the rainfall above the Lanzhou section of the Yellow River was less than in previous years. Among them, the average precipitation in Lanzhou was 30.4 mm, a decrease of 64%from the average precipitation of the same period over the same period. The precipitation in the upstream basin is insufficient, and the sediment that is carried into the Yellow River is less. The color of the water body naturally becomes a blue color that reflects the clear water body.

Due to the impact of precipitation, the water flow in the Lanzhou section of the Yellow River has also decreased compared with the same period of previous years. Recently, the water flow is about 1200 cubic meters per second, which has relatively weakened the erosion of the land, and it also "holds" the sediment that was originally deposited at the bottom of the river. In addition, the content of the sediment in Liujiaxia and its downstream reservoir decreased, and the reservoir did not carry out water adjustment and sand, and the sediment of the dry flow of the Yellow River from the warehouse was also reduced.

But does the Yellow River "change their face" only by "watching the world"? Not that. On both sides of the Yellow River Lanzhou section, the water source of the forest belt like a huge green carpet wrapped in the river beach and ecological protection areas. Trees and wetlands enhance the anti -rolling force of the soil in the slope of the Yellow River, and slow down the speed of soil loss.

On June 14th, the green Yellow River flowed over the century of Zhongshan Bridge

"Soil and water conservation is closely related to the ecological protection of the Yellow River." Feng Zhiliang said that since 2019, Gansu Province has successively completed a number of scientific plans for governance of the Yellow River Gansu section of the Yellow River. Up to now, 620 acres of forest land in the north and south mountains of Lanzhou City alone have been completed for 55 square kilometers of small basin governance, and 620,000 tons of sediment can be reduced into the Yellow River each year.

At the same time, in response to the problem of river water pollution, Lanzhou has rectified 135 rivers to occupy, collect, piles, and build problems in the river. In the transformation, the sewage treatment capacity increased by 50%, and the emission standards were increased from first -level B to the first level A to prevent the phenomenon of "sand and pollution".

In 2021, the Blue Book of Gansu stated that the comprehensive evaluation of the outbound water quality of the Yellow River Lanzhou section has been stabilized for four consecutive years to reach the two types of water quality standards of the surface water, achieving "one river water purification of downstream".

The "turquoise" face that is only available in the Yellow River in autumn and winter

A Lanzhou citizen who was cool by the river told reporters that it has been nearly 15 years since he has come to Lanzhou. In recent years, it can be seen that the Yellow River has become better and better. For the recent "from yellow to green" in the Yellow River, she admits that "unexpectedly, but it is also reasonable."

According to statistics from relevant departments, the average annual output of exit in Gansu Province has decreased from 260 million tons in the 1960s to 40 million tons of nearly ten years, a decrease of 85%. The total sand content of the Yellow River Lanzhou section is about 2 kilograms per cubic meter for many years. Investigation, the Yellow River is still "fresh" in the summer, which is related to natural reasons, but it is also related to the generations of people on the Loess Plateau, picking water on the mountains, picking water to fight drought, planting trees, and hard work.

Although from late June, affected by the changes in the upper reaches of the Yellow River and the reasons such as reservoir scheduling, the Yellow River may gradually restore the "color". However, with the decrease in soil and soil loss on both sides of the Yellow River, the improvement of the Yellow River's water quality, and the increase in high -quality water ratio, there will still be many opportunities to watch the "cyan" Yellow River in the summer. (China News Network)

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