Ganqing is an important water conservation area and recharge area in the Yellow River Basin.
Qinghai Province, the outbound flow of the Yellow River is 28.63 billion cubic meters (including groundwater resources), and the runoff of the Yangtze River is 12.96 billion cubic meters (excluding groundwater resources). Gansu Province does not include self-water and groundwater resources, and is the Yellow River and Yangtze River. The recharge runoff volume is 23.07 billion cubic meters, the Yellow River recharges 12.92 billion cubic meters of water resources, and the Yangtze River recharges 10.15 billion cubic meters of water resources. Gansu and Qinghai recharge 64.66 billion cubic meters of water resources for the Yangtze River and Yellow River. Gansu and Qinghai are important water conservation and recharge areas in the Yellow River Basin.
Qinghai Province has 380 rivers with a catchment area of ??more than 500 square kilometers. The total annual runoff of the province is 61.123 billion cubic meters, ranking 15th in the country in terms of total water resources. The per capita share is 5.3 times the national average, accounting for 49% of the total runoff of the Yellow River, 1.8% of the total runoff of the Yangtze River, and 1.8% of the total runoff of the Lancang River. 17% of the runoff and 45.1% of the total runoff of the Heihe River flow out of Qinghai. 59.6 billion cubic meters of water flows out of Qinghai every year.
Introduction to the source of the Yellow River
The "yellow" in the Yellow River is actually sediment. It is recorded in ancient books: "The Yellow River fights with water, and mud dwells in it." Analysis of modern measured data shows that the average annual sediment transport volume of the main stream of the Yellow River is 1.6 billion tons, and the sediment content is 35 kilograms per cubic meter. The sediment content is the highest among rivers in the world. Where does the Yellow River sediment come from? Ninety percent come from the Loess Plateau. The soil here is loose and easily corroded and scattered. Every time there is a heavy rain, a large amount of water and soil are lost and flow into the Yellow River.
The area above Duoshixia Gorge in Maduo County, Qinghai Province is the river source area, covering an area of ??22,800 square kilometers. It is part of the Qinghai Plateau and belongs to the wide valley zone of the lake basin, with an altitude of more than 4,200 meters. The basin is surrounded by majestic mountains, with Yaladaze Mountain in the west, Animaqing Mountain (also known as Jishi Mountain) in the east, Burhan Buda Mountains in the north, and Bayan Har Mountain and the Yangtze River Basin in the south. Yuegu Zonglie at the western end of the lake basin is the source of the Yellow River.
Reference for the above content: Baidu Encyclopedia-Yellow River