Gannan county is located at the southern foot of Daxing 'anling Mountains, on the right bank of the middle reaches of Nenjiang River, bordering Nuo Min and Nenjiang River in the east, Molidawa Banner, nehe city and Fuyu County in the south, Longjiang County and Daur area in Meris in the south, Buteha Banner and Arong Banner in the west and north, with a total area of 479 1 square kilometer. There are 5 towns, 5 townships, 2 state-owned farms, 95 administrative villages, 6 1 1 natural villages with 2.97 million mu of cultivated land. Gannan county Municipal People's Government in the town.

Gannan Tibetan Autonomous Prefecture, Gansu Autonomous Prefecture, Yellow River and Yangtze River water conservation areas and recharge areas, ecological main functional areas determined by the state, and ecological civilization demonstration areas in advance. Gannan is located in the west of China, southwest of Gansu, at the junction of Gansu, Qinghai and Sichuan provinces, where the Qinghai-Tibet Plateau is in transition to the Loess Plateau. It is connected to Aba Prefecture in Sichuan in the south, Huangnan Prefecture and Guoluo Prefecture in Qinghai in the southwest, and Longnan City, Dingxi City and Linxia Prefecture in the east and north.

Introduction to the geographical environment of gannan county;

1, geology

The territory is fertile, with meadow soil, black soil, chernozem and dark brown soil accounting for more than 90%, of which meadow soil accounts for 54.87%, followed by black soil 18.82%, dark brown soil 13.46% and chernozem 10.72%. There are a few other soil types, such as swamp soil, fluvo-aquic soil, saline soil and alkaline earth, accounting for 2. 13%. The organic matter content is between 2-8%, which is suitable for the growth of various crops. There are 1 1 soil types in gannan county, including 24 subtypes, 46 soil genera and 8 1 soil types.

2. Terrain

The landform of the county belongs to the transition zone between Daxinganling and Nenjiang impact plains, with hills and hilly areas in the west and north, and flat and open plains in the south and southeast. The northwest accounts for 47.6% of the land area; The southeast is an open alluvial plain, accounting for 52.4% of the land area. The terrain is high in the northwest and low in the southeast, and gradually declines. Average slope 1000-2000, elevation160-380m.

Reference to the above content: Baidu Encyclopedia-Gannan Tibetan Autonomous Prefecture