The Middle Route of the South-to-North Water transfer Project has been opened for nearly two years: what does 5 billion cubic meters of south water bring?

Since the opening of the first phase of the middle route of the South-to-North Water transfer Project, 5 billion cubic meters of water has been transferred in more than 600 days, benefiting more than 40 million residents in Beijing, Tianjin, Hebei and Henan. Drinking water from the same river, a few days ago, 30 representatives of the masses from the water source of the middle route walked into Beijing and Tianjin to talk with the people and experts in the receiving area about "water diversion, water use, and water saving."

What has the South-to-North Water transfer Project brought along the route in the past two years?

The water quality is better, and the safety of water supply is more secure.

"the water is ready now!" In the Lanshuiyuan District, Hexi District, Tianjin, Aunt Cui Xiufang said to the delegates, "in the past, Tianjin was a strange place to marinate pickles with tap water." The water I ate when I was a child was so bitter and astringent that I couldn't even make tea. "

"there is less water and alkali!" Liu Suxiang, a resident who lives in the fourth mile of Jianxin Garden in Fengtai District, Beijing, took out a kettle and said, "look, this pot hasn't been brushed for a month, and there's no scale."

The most direct feeling of the people in the receiving area is that the water quality is better and the scale is less when the south water is used to relieve thirst. The data show that the water quality of Danjiangkou Reservoir at the source has reached Ⅱ class for many years. According to the monitoring of Beijing Water supply Group, after using Nanshui, the hardness of tap water decreased from 380 mg to 120 Mu 130 mg per liter. "Danjiang water is low in hardness, slightly alkaline, and tastes better than groundwater." Introduction by technicians of Guogongzhuang Waterworks.

The pattern of water supply is also changing. "as a result, Beijing has bid farewell to the predicament of a single source of water, and the safety factor of water supply in the central urban area has increased from 1.0 to 1.2." Sun Guosheng, director of the Beijing South-to-North Water diversion Office, said that at present, more than 70 percent of the urban water supply uses southern water, directly benefiting 11 million residents.

By 2020, Beijing will realize the "three-water joint diversion" of Miyun Reservoir, underground water sources and external water diversion sources. Southern water is mainly used for urban life, providing water for 20 waterworks in the central city and the new city, and the scope of water supply basically covers the Beijing plain area. benefiting 20 million people.

Liu Changping, deputy inspector of the Tianjin Water Bureau, said: up to now, the amount of water in Tianjin has increased by 1.06 billion cubic meters, and more than half of the urban residents have eaten southern water, changing from "single diversion of Luan River" to "double water source protection," which is equivalent to adding a lifeline for water delivery. The contradiction of "dependence, oneness and fragility" of urban water supply has been effectively resolved.

Water saving, water saving priority is not "self-willed"

Southern water is not easy to come by, and the receiving area insists on giving priority to water conservation, and the use of water is not "wayward".

Sun Guosheng said that while measuring water, Beijing adheres to the principle of "drinking, storing, and replenishing". The 1.58 billion cubic meters of southern water transferred should first be satisfied with "drinking", and 70 percent should be supplied to waterworks for urban domestic water use. At present, 200 million cubic meters of water is stored in Miyun Reservoir, Huairou Reservoir, the Ming Tombs Reservoir and Daning diversion Reservoir, which plays an important role in the allocation of water resources in Beijing.

Beijing strictly controls water and tightens the "faucet". Last year, 78000 sets of high-efficiency water-saving appliances were installed in the city. More than 70% of the reclaimed water in Beijing comes from reclaimed water. Last year, reclaimed water accounted for 1% of the total water consumption, making it a stable "second water source." During the 12th five-year Plan period, Beijing saved an average of 100 million cubic meters of water a year, equivalent to saving a large reservoir every year.

Tianjin has calculated carefully and subdivided water into five types: surface water, groundwater, external diversion water, reclaimed water and desalinated seawater, achieving differential pricing and optimal use of water. The reuse rate of industrial water has reached 92%, and the utilization rate of reclaimed water has reached more than 30%.

Saving water is becoming a consensus. In each of the water-saving communities in the receiving area, rice washing water is used to wash vegetables before watering flowers, and laundry water is used to flush toilets. "one water can use more than one water" has become the living habit of many citizens. Tianjin has built 1056 water-saving enterprises and 476 water-saving residential areas, with a coverage rate of 44.9% and 18.2% respectively. 1178 rain and flood utilization projects were completed in Beijing, and the comprehensive utilization of Rain Water in cities and towns reached 162 million cubic meters last year.

The ecology has benefited, and the groundwater level has gradually rebounded.

With surface water and strict control of groundwater, ecological benefits are becoming more and more obvious. Thanks to the replenishment of southern water, Beijing has extracted 114 million cubic meters of groundwater. At the same time, the experimental water supply of 84 million cubic meters to Miyun, Huairou and Shunyi water sources has significantly increased the regional groundwater level, with a local maximum increase of 8 meters. Monitoring shows that at the end of July this year, the average buried depth of groundwater in the Beijing Plain was 62 cm higher than that in the same period last year.

To make up for ecological debts, Beijing uses southern water to supply 174 million cubic meters of water to urban rivers and lakes, and jointly dispatches with existing reclaimed water, so that the ecological environment of urban water has been improved, and the quality of urban water is close to that of surface water Ⅲ. The once-dry Xiaoyue Lake in Lugou sparkled again, and Aunt Xu, an 83-year-old resident, said, "I didn't expect to see the scene of 20 years ago again."

Tianjin has re-delineated the areas where groundwater exploitation is prohibited and restricted, and proposed that by the end of 2020, the annual exploitation of deep groundwater in the city will be controlled within 90 million cubic meters. In the past two years, more than 80 water use units have completed the conversion of water sources, reducing the allowable production capacity of groundwater by 10.1 million cubic meters and backfilling more than 110 motor wells.

Dong Shulong, director of the comprehensive office of Tianjin South-to-North Water diversion Office, said that Tianjin has changed ecological emergency water supply into regular water supply, supplying a total of 520 million cubic meters of water to the landscape river, providing a strong support for the construction of "beautiful Tianjin."

"with the normalization of water supply for the south-to-north water transfer project and the gradual realization of the goal of underground water pressure mining, the groundwater level in Tianjin will gradually rise." Dong Shulong said.