Where is the desert scenery?

One of the big sand areas in China. It is located at 37 27.5' ~ 39 22.5' north latitude and107 20' ~130' east longitude. Including the southern Inner Mongolia Autonomous Region, the northern part of Yulin area in Shaanxi Province and the northeastern part of Yanchi County in Ningxia Hui Autonomous Region, with a total area of 39,800 square kilometers. Place names originated in Maowusu Village, Haizetan Township, Jingbian County, northern Shaanxi Province. The continuous sand belt from Mengjiashawo with self-defined boundary to Gao Jiagou Township in Jingbian is called the Mu Us Sand Belt, which is a preliminary understanding of the Mu Us Mountains. Because the sandy land along the Great Wall in northern Shaanxi and the sandy land south of Yikezhaomeng in Inner Mongolia are continuously distributed together, the sandy land in the southeast of Ordos Plateau and along the Great Wall in northern Shaanxi are collectively called "Mu Us Sandy Land".

The elevation of Mu Us sandy land is mostly at1100 ~1300m, slightly higher in the northwest, reaching 1400 ~ 1500m, and it can reach 1600m in some areas. The valley in the southeast is as low as 950 meters. Mu Us Sandy Land is mainly located in the lake alluvial plain depression between Ordos Plateau and Loess Plateau. Beams exposed at the periphery of the sand area and extending into the sand area are mainly Cretaceous red and gray sandstone, and the rock strata are basically horizontal, and most of the beams have flat top surfaces. Various Quaternary sediments are obviously sandy, and loose sand layers are transported by the wind to form flowing quicksand. Plain high beach land (including plain watershed land and Liangbian high beach land) is mainly distributed in Holocene Pliocene lacustrine alluvium.

The average annual temperature in the sandy area is 6.0 ~ 8.5℃, 1 month is -9.5 ~ 12℃, the average temperature in July is 22 ~ 24℃, and the annual precipitation is 250 ~ 440mm, which is concentrated in July ~ September, accounting for 60 ~ 75% of the annual precipitation, especially in August. The precipitation varies greatly from year to year, and the rainy year is 2 ~ 4 times that of the dry year. Drought and waterlogging often occur, and drought is greater than waterlogging. In summer, there are frequent storms and hail disasters, and the maximum daily precipitation can reach100 ~ 200 mm. The annual precipitation in the eastern part of the sandy land is 400 ~ 440mm, which belongs to the shallow chestnut grassland belt. The quicksand and Bala (semi-fixed and fixed dunes) are widely distributed, and the precipitation in the northwest is 250 ~ 300mm, which belongs to the brown calcareous semi-desert belt.

Mu Us Sandy Land is located at the intersection of many natural zones, and the vegetation and soil show transitional characteristics. Except for the semi-desert belt of brown calcareous soil in the northwest, the semi-desert belt of gray calcareous soil in Yanchi area in the southwest, and the forest grassland belt of gray cinnamon soil in the warm temperate zone of the Loess Plateau in the southeast.

The types of land use in sandy areas are complex, and different land use patterns are often intertwined. Farming, forestry and animal husbandry land are staggered, showing obvious regional differences from southeast to northwest. The southeast has superior natural conditions, serious man-made damage and a large proportion of quicksand. In addition to quicksand, there are patches of semi-fixed and fixed sandy land in the northwest. Farmland in the eastern and southern regions is highly concentrated in valley terraces and beaches, while farmland in the northwest region decreases and grassland distribution increases. The existing land for agriculture, animal husbandry and forestry has not been fully utilized and the management is extensive.