In 2021, the average buried depth of groundwater in the Beijing Plain will be 16.39 meters


　　Beijing's groundwater level rises to highest in 20 years (listen)

　　core reading

　　The data shows that in 2021, the average burial depth of groundwater in the Beijing Plain will be 16.39 meters, higher than 16.42 meters in 2001, making it the year with the highest groundwater level in the past 20 years.

　　The lack of water is the market situation and water situation that Beijing has faced for a long time.

In recent years, Beijing has persistently promoted the ecological recovery of rivers and lakes. The amount of groundwater exploitation has decreased year by year, and the groundwater level has continued to rise for six consecutive years, and the goal of "holding water in the ground" has been initially achieved.

From "water replenishment" and "water saving" to "extraction control", how does Beijing realize the continuous rise of the groundwater level?

Please see the reporter survey.

　　"One river is forever fixed, and the city is prosperous because of water." Beijing, which has a history of more than 3,000 years of building a city and a capital of more than 800 years, used to be full of springs and many rivers and lakes.

However, with the development of the city and the surge in population, the groundwater level in Beijing once showed an accelerated downward trend due to factors such as overexploitation and climate: from an average burial depth of 15.36 meters in 2000 to 25.75 meters in 2015.

　　The data shows that in 2021, the average burial depth of groundwater in the Beijing Plain will be 16.39 meters, higher than 16.42 meters in 2001, making it the year with the highest groundwater level in the past 20 years. Reaching 86%, the background color of the capital's green water and green mountains is constantly being polished.

　　Strengthen "supplement"

　　Yongding River flows into the sea for the first time in 26 years

　　On March 28, in the gate room of the Guanting Reservoir Management Office, the staff pressed the button to open the gate, and the flow of water out of the reservoir at the bottom of the gate increased, running along the spillway towards the Yongding River.

"The spring centralized water replenishment work of the Beijing section of the Yongding River in 2022 will be officially launched." Lu Jinzhong, director of the Guanting Reservoir Management Office, announced.

　　The Yongding River is Beijing's "mother river". It was once plagued by the cut-off of the river and a serious drop in the groundwater level.

With the implementation of the Beijing-Tianjin-Hebei coordinated development strategy, the fate of Yongding River has ushered in a turning point.

In order to restore the vitality of the Yongding River and realize the goal of "flowing river", Beijing, under the unified organization and coordination of the Haihe Water Conservancy Commission of the Ministry of Water Resources, has worked closely with Shanxi Province and Hebei Province to carry out ecological water replenishment.

In 2019, the 130-kilometer Beijing section of the Yongding River was opened to water, and the mountain and gorge sections of the Yongding River that had been dry for many years showed a scene of rippling blue waves; in 2020, the 170-kilometer Beijing section of the Yongding River was fully open to water, and the water head reached the farthest point in Wuxi, Tianjin. Qing District; in 2021, the Yongding River will realize the entire water flow of the entire basin and enter the sea, which is the first time in 26 years.

　　"The effect of ecological water replenishment on groundwater level recovery can be said to be immediate." Jiang Tisheng, deputy director of the Groundwater Management Office of the Beijing Water Affairs Bureau, introduced that last year, the Yongding River accumulated 220 million cubic meters of ecological water supply, and the groundwater level around the Yongding River rose by an average of 1.74 meters.

　　Last year, Beijing promoted the ecological water replenishment experience of the Yongding River in the Chaobai River and other basins for the first time. The main stream of the Chaobai River, which has been dry for 22 years, has achieved water flow across the board.

　　The reporter learned from the Miyun Reservoir Management Office that since the start of ecological water replenishment last spring, as of March 23 this year, Miyun Reservoir has accumulated 1.2 billion cubic meters of ecological water supply to the downstream Chaobai River.

　　The resurgence of spring water is the most direct manifestation of the conservation of groundwater sources and the recovery of groundwater levels.

In Qincheng Village, located in the east of Changping District, Beijing and on the north bank of the Jingmi Diversion Canal, there is a spring with a long history - Qincheng Spring.

In August last year, Qinchengquan spewed again after a lapse of 20 years, and it has been 8 months since then.

The trickling spring water and the deep gurgling flow have attracted constant visits from the quiet village.

　　According to the latest monitoring data from the Beijing General Station of Hydrology, the groundwater level in Beijing has been rising for six consecutive years. In addition to the abundant precipitation last year, 81 springs in the suburbs of Beijing are showing a gratifying scene.

　　Vigorously "Festival"

　　Reclaimed water becomes "second water source"

　　Since 1999, Beijing has suffered from dry weather for many years. In order to meet the needs of water supply for the rapid development of the city, a large amount of groundwater has to be extracted.

Years of over-exploitation have become the direct cause of the continuous decline of the groundwater level. It was not until the end of 2014 that the Nanshui River entered Beijing, and the groundwater level in Beijing ushered in a turning point of stabilizing and rebounding.

　　"Although the river water from the South-to-North Water Diversion Project has entered Beijing, the per capita water resources have increased to about 150 cubic meters, but it is still far below the internationally recognized warning line of extreme water shortage of 500 cubic meters. It is the basic city and water situation that Beijing has faced for a long time." said Yang Jinhuai, deputy director of the Beijing Municipal Water Affairs Bureau.

　　Against this background, Beijing has thoroughly implemented the strategy of "prioritizing water conservation" and persistently promoted the strictest water resources management. All 16 districts in the city have been built into water-saving districts, and "peak" management and control of water for production and domestic use has been implemented.

"We vigorously promote water-saving appliances, and have already replaced 80,000 sets of high-efficiency water-saving appliances." Zhang Xinxin, director of the Beijing Water Saving Office, introduced.

　　Under the condition that the capital's population remains high and the economy continues to develop steadily, the city's production and domestic water use has always been controlled within 3 billion cubic meters.

During the "13th Five-Year Plan" period, the city's water consumption per 10,000 yuan GDP dropped from 15.4 cubic meters to 11.3 cubic meters, ranking first in the country.

　　On the other hand, Beijing actively promotes the recycling of water resources to replace clean water sources and achieve sustainable development.

Since 2013, the main effluent indicators of all newly built reclaimed water plants and upgraded sewage treatment plants in Beijing have reached the surface water category IV standard at one time. The application field of reclaimed water has been continuously expanded, and the level of utilization has been greatly improved. Industry, river and lake environment and road watering, etc.

　　In the BOE production workshop located in the Beijing Economic and Technological Development Zone, automatic production lines run in an orderly manner, and each LCD panel is "born" here.

Its projects use an average of 27,000 cubic meters of industrial high-quality reclaimed water per day, saving about 10 million cubic meters of water annually; SMIC uses part of the effluent from the Xiaohongmen Reclaimed Water Plant as the water source, and after deep purification, provides industrial ultra-high Pure water, since the establishment of the plant, the accumulated water saving is more than 24 million cubic meters.

According to statistics, in 2021, the utilization of industrial recycled water in Beijing will be 67.54 million cubic meters, and all power industries such as the eight thermal power centers and thermal power plants will be replaced by recycled water.

　　In 2021, the city's utilization of reclaimed water will reach 1.2 billion cubic meters, accounting for nearly 30% of Beijing's total annual water resources allocation. Reclaimed water has become a stable and reliable "second water source" in Beijing.

　　Strictly "control"

　　Owned wells have withdrawn from the stage of history

　　The South River flows northward and flows into the homes of millions of people in Beijing through the municipal pipe network.

　　In 2015, the second year after Nanshui entered Beijing, Beijing launched a large-scale replacement of self-provided wells and the reduction of groundwater source pressure.

　　"Continuously expanding the coverage of municipal water sources and implementing self-provided well replacement is an important measure to control overexploitation of groundwater and conserve groundwater, which effectively promotes the conservation and recovery of groundwater resources." Jiang Tisheng introduced that in December 2021, with the Baxin Chaoyang District The Jiayuan Community completed the hooking of the water supply pipeline and the external pipeline, and the self-provided wells of 20 (unit) communities in Beijing completed their mission of extracting groundwater and retired from the stage of history.

　　"Beijing's groundwater intake projects (motorized wells) are widely distributed and large in number, but due to the large span of construction process and many problems left over from history, there have been problems such as unclear numbers and inaccurate dynamic control for a long time, which has become the biggest bottleneck in the supervision of groundwater intake. "Jiang Tisheng said that in recent years, Beijing has concentrated its efforts to organize and implement the inspection of wells, and comprehensively promote the management of wells and the construction of well codes, make full use of cloud technology, the Internet of Things, etc., and combine the city's smart water construction to upload well data. To the "cloud", the foundation of well-operated well management has been comprehensively consolidated, and the level of refined groundwater management has been improved.

　　At the end of 2021, in the one-month special law enforcement inspection of motor-driven wells, more than 350 motor-operated wells in Dongxi City have undergone severe "tests" one by one.

The "decommissioned" captive wells are either sealed, or stored for future use, or converted to monitoring wells.

The relevant person in charge said that Beijing is constantly strengthening the management of the full life cycle of wells, from strictly controlling the approval threshold for drilling wells to rationally disposing of replaced or abandoned wells.

　　Conservation in the ground, nourishing all things.

Today, Beijing's underground "water basin" is becoming more and more full: years of land subsidence have been alleviated; the water level in the funnel area has risen significantly; the total amount of water storage in the Western Suburbs Stormwater Regulation and Storage Project has exceeded 4 million cubic meters; The depth of groundwater has returned to the pre-mining level, a record high since the water source was opened... The city's healthy water body has increased from 60% to 86%, the water quality of rivers and lakes has been significantly improved, the population of aquatic animals and plants has increased steadily, and the species of phytoplankton has increased from 210 to 210 The number of species increased to 447, the species of zooplankton increased from 108 to 304, the species of benthic animals increased from 44 to 230, and a group of rare waterfowl such as black stork, egret and heron became resident birds...

　　At the same time, Beijing has continued to increase the opening and sharing of waterfront space by taking advantage of the improved water ecological environment.

The Beijing section of the Grand Canal was opened to navigation, the stormwater storage project in the western suburbs was opened to the public, and 25 river and lake skating rinks and 600 fishing platforms were newly opened.

　　Our reporter He Yong