亚洲第一无码AV播放器下载,国产综合精品,国产女人喷潮视频免费,亚洲成A人一区二区三区

Source: China Water Industry Network

1,000 cubic meters per capita is the internationally recognized water shortage warning line. The per capita water resources of 100 cubic meters have long made Beijing one of the most water-scarce cities in the world.

Although the contradiction between water supply and demand has long reached a critical point, Beijing residents will not feel the supply is tight. Whenever they turn on the tap, clear tap water will gush out.

Behind this is a series of strategic measures to solve the problem. Beijing has not only made great efforts to strengthen multi-source scheduling and greatly improve water use efficiency, but also continuously improved the water quality supervision system to ensure the safety of urban water use.

Miyun Reservoir is the largest "drinking basin" in Beijing. In order to ensure the water quality and water volume of the reservoir, since 2007, 103,000 mu of rice fields in the upstream area have been converted to water-saving crops such as corn. Excluding river evaporation and runoff losses, this project "stocks" at least 50 million cubic meters of water for Beijing every year.

Local emergency water source projects and external water diversion projects are ways to increase urban water use. At present, there are 9 water sources entering Beijing's municipal water supply network. Some experts said that although this practice is a last resort, from another perspective, this interconnected and mutually adjusted water source pattern can effectively avoid the risks brought by emergencies and improve the safety factor of urban water supply.

The water shortage situation has also made Beijing continue to increase the efficiency of water resource utilization. Wang Hao, an academician of the Chinese Academy of Engineering and director of the Water Resources Research Institute of the China Institute of Water Resources and Hydropower Research, said that Beijing's water resource utilization efficiency index is not only the highest in the country, but also on par with the average level of developed countries such as the United States and Japan. In other words, to create the same GDP, Beijing only needs to consume the same amount of water as the United States.

It is understood that since 2003, Beijing has included recycled water in the city's annual water resource allocation plan for unified allocation. In 2010, the annual consumption of recycled water has reached 680 million cubic meters, and the proportion of water supply has increased from 8% to 19%, becoming an indispensable water source for Beijing. In order to promote and encourage the use of recycled water, Beijing has not only maintained the price of recycled water at 1 yuan per cubic meter for many years, but users of recycled water are also exempted from water resource fees and sewage treatment fees.

In order to retain water and use it well through more channels, seven years ago, Beijing changed flood prevention to "welcoming floods" and turned the rain and floods during the flood season into benefits. During this flood season, the city's rain and flood utilization projects intercepted and stored 35.59 million cubic meters of rainwater, equivalent to the water storage capacity of nearly 18 Kunming Lakes. In addition, urban rivers and lakes intercepted and utilized 41.99 million cubic meters of rainwater during the flood season, adding a lot to the construction of "Green Beijing".

At the same time, rain and flood utilization also deeply serves the development of urban modern agriculture. The reporter visited and found that in places with high altitudes, dense gullies and steep slopes, thin soil and sparse vegetation, such as Miyun, Huairou and Fangshan, comprehensive measures such as gully leveling, mountain closure and afforestation, and introduction of forage grass were adopted to slow down floods and intercept sand, eliminate harm and promote benefits, and turn barren gullies into splendid mountains and rivers with lush forests and grains and fragrant flowers and fruits.

In view of the mixing of different water sources and the seasonal changes in water quality, Beijing will adjust the production process in time and do a good job in ensuring water supply. In the face of accidents such as damage to outdoor water supply pipes, emergency repair units are equipped with double emergency repair teams, using scientific and technological means such as GIS geographic information management system and GPS satellite positioning system to improve response speed.