共和盆地位于青藏高原东北部,在祁连山、昆仑山和秦岭三大山系之间,是一个有代表性的大型断陷盆地,堆积了发育良好的第四纪河湖沉积物地层,曾经是沙漠化的物质来源。20世纪末,国家更加重视西部地区的生态保护和建设,在共和盆地实施了天保工程、退耕还林草工程和重点公益林保护工程、三北防护林建设工程等国家重点生态建设工程,使该地区生态环境 Located in the northeastern Qinghai-Tibet Plateau, the Republican Basin is a representative large-scale fault-depression basin between the Qilian Mountains, the Kunlun Mountains and the Qinling Mountains. The well-developed Quaternary sediments of Quaternary sediments, once desertified Material source. At the end of the 20th century, the state paid more attention to the ecological protection and construction in the western region. In the Republican Basin, it carried out national key ecological construction projects such as the Natural Forest Protection Project, the Project of Returning Cultivated Land to Forests and Grasslands and the Key Public Welfare Forest, and the Three North Shelterbelt Project, surroundings