Is Qinghai dry?

Qinghai Lake is the largest saltwater lake in China and the largest inland lake on the plateau. There is no drought in Qinghai Lake. I guess the landlord wants to ask why the water level of the lake has dropped. There are several reasons: the water source of Qinghai Lake mainly depends on surface runoff and precipitation. The reason for the decline of the lake surface is largely due to the decrease in the amount of water entering the lake, mainly due to the decrease in the amount of water in Buha River, Bawulan River and Sidetang River (also known as Daotang River). The water level in Qinghai Lake drops 12 1 cm on average every year. In 2000, the water level dropped the fastest, and 1 year dropped by 2 1 cm. At this rate, the water in Qinghai Lake is reduced by 436 million cubic meters every year. Lake Group A, which is splitting from a single plateau lake into "a large number of small lakes", is mainly due to climate warming, intensified human activities and reduced rainfall, especially the blind reclamation around Qinghai Lake, which has destroyed the water source of the injected river. At present, 50% of the injected rivers in Qinghai Lake have dried up. According to statistics, due to the sharp reduction of rivers supplied by water sources, the amount of water entering the lake is reduced by 60% compared with that of 20 years ago. In recent decades, affected by climate warming and human activities, the water level in Qinghai Lake has been continuously declining, and the degradation of the basin ecosystem has intensified. According to monitoring, in the past 50 years, the water level of Qinghai Lake has dropped by 3.78 meters, and the water surface area has decreased by 362.3 square kilometers, which is roughly equivalent to reducing the West Lake in Hangzhou every year. Some experts predict that Qinghai Lake with an average water depth of18m will disappear completely in 200 years. At present, due to the warm and dry climate and the degradation of the ecosystem in the whole basin, the general trend of water level decline in Qinghai Lake is difficult to change in the short term. Measures taken: In order to protect Qinghai Lake, Song Xiuyan, Governor of Qinghai Province, announced on May 26, 2008 that the ecological environment protection and comprehensive management project of Qinghai Lake Basin was officially launched, with an investment of nearly 654.38+06 billion yuan, and the original ecology of Qinghai Lake was restored to the maximum extent within 654.38+00 years. This is the second large-scale comprehensive ecological environment improvement project in Qinghai Province after the "Three Rivers Source" ecological protection project. Wang Zhicai, director of the Animal Husbandry Department of the Ministry of Agriculture of China, said that the implementation of this project will effectively protect and restore the ecological environment of the Qinghai Lake Basin, gradually alleviate the downward trend of the water level in Qinghai Lake, and is of great significance to maintaining the ecological security of the Qinghai-Tibet Plateau. The total investment of ecological environment protection and comprehensive management project in Qinghai Lake Basin is 65.438+56.7 million yuan, and the planned implementation period is 65.438+0 years, which will be carried out in Gangcha, Haiyan, Tianjun, * * and 4 counties of Qinghai Lake Basin, covering the whole Qinghai Lake Basin. The main construction contents of the project include wetland protection, degraded grassland management, grassland rodent and pest control, desertification land management, ecological shelter forest construction, returning grazing to grassland and ecological migration. According to the plan, 854,700 hectares of natural grassland will be banned from grazing; Wetland protection is 276,600 hectares; Degraded grassland with serious desertification is 910.5 million hectares; Vegetation restoration of degraded grassland in black soil type is 9 1 1 10,000 hectares; 338,600 hectares of poisonous weeds were eliminated; Grassland rodent control 1.3024 million hectares; 39,400 hectares of desertified land; Ecological forest construction is 34,400 hectares. At the same time, 88 1 household and 4 157 people were resettled in the watershed around Qinghai Lake, and the stock of all kinds of livestock was reduced to nearly one million. Six rivers entering the lake, such as Buha River, were rehabilitated for 200 kilometers, and the dam of Shinaihai Power Station was demolished. Among the total investment of all projects, the construction investment of wetland protection and environmental governance, degraded land protection and governance and biodiversity protection accounts for 92.8% of the total investment; Another investment will be used to improve the production and living conditions of farmers and herdsmen, resettlement and technical support and management projects. The implementation of the project will combine man-made protection with natural restoration. In the first five years, restoration will be the main task, and in the next five years, construction will continue to consolidate the achievements. The overall goal is to promote the virtuous circle of the natural ecosystem in the whole basin and the sustainable development of economy and society, realize the restoration of ecological functions, improve people's living standards and live in harmony with nature. At present, relevant monitoring shows that in recent years, the water level of Qinghai Lake has continued to rise and the water area has been increasing. In addition, it is reported that the water level in Qinghai Lake will continue to rise in ten years. This judgment was made by researcher Li Shijie, vice president of Nanjing Branch of Chinese Academy of Sciences. Three years later, Li Shijie and his doctoral students used this numerical model to make repeated calculations. The results show that the water level of Qinghai Lake is in a fluctuating state before 20 10, and then it reaches a stable state. After 20 16, it will continue to rise, and the water level will return to the level of the 1970s around 2030, more than it is now. ...