Reasons for the disappearance of Qingtu Lake

The only surface runoff in Minqin is Shiyang River, which originates from the northern Qilian Mountains. With the change of climate conditions and the intensification of water use in the middle and upper reaches, the water flow from Shiyang River into Minqin through Hong Yashan Reservoir has been decreasing year by year at a rate of more than150,000 cubic meters, and it is currently less than1000 million cubic meters. The main reason for the disappearance of Qingtu Lake is the construction of Hong Yashan Reservoir, which destroyed the water supply of Qingtu Lake and the local groundwater system, leading to desertification in this area. Today, due to the loss of recharge, neutralization, erosion and dilution of upstream water, salinization has moved up and expanded from soil and groundwater year by year, which will definitely affect the whole Minqin and Shiyang River basins. The groundwater in the dam area is seriously overexploited and will eventually be exhausted. In addition, Minqin immigrants revived the reservoir area, raised the groundwater excessively and made the surface water salinized due to strong evaporation. The reservoir itself is an unscientific project with heavy siltation, large area and fierce evaporation, which violates the law of harmony between man and water and the reasonable coexistence of man and nature in arid areas and will be punished and retaliated by nature. I wonder if this problem also exists in the Three Gorges Project today?

During the maintenance of Hong Yashan Reservoir 1958, there was a dispute between "maintenance" and "no maintenance". One school, headed by secretary Tang Deshou, specializes in reservoirs, and thinks that the advantages of flood control irrigation outweigh the disadvantages. Some forces, led by Li Yuxin, the local county magistrate of Minqin, think that there is no need to build a reservoir, and it is not worth the loss to waste people and money-Minqin's sandy land is a vast desert with a number of sand nests in the middle, so there is no way to talk about flood disasters. As long as the canal is dredged, how much water is not a disaster, but the oasis is greener, the grassland is more prosperous, and the six animals are fatter. Minqin has always been a combination of agriculture and animal husbandry. When agriculture is affected, the vast pastoral areas have vast and rich grasslands, with compensation for camels, cattle and sheep. However, under the general situation and climate of China at that time, universities finally gained the upper hand, because the background of the country at that time was "grain as the key link" and "reclamation". However, just over 40 years later, in the summer of 2004, something happened that frightened 300,000 Minqin people and called for help: Shiyang River was cut off, Hong Yashan Reservoir was completely dried up, and the reservoir was upside down. People living here look up and ask: where is the way out for tomorrow? !