Ordos Desert

Ordos Desert is the atlas title; geomorphic research also uses the plural Ordos Deserts. Its two named sandy tracts appear in the literature as Kubuqi, Hobq or Qubqi, and as Mu Us or Maowusu. This page covers those tracts and the denuded plateau surfaces and closed basins that physically connect them.^[1][2]

The Ordos Basin is a geological and sedimentary basin with a different analytical boundary. The Ordos Plateau is the elevated surface inside the Yellow River bend. Neither term means that every square kilometre inside it is desert: the regional surface also includes bedrock tableland, steppe, lake plains, river valleys and loess-transition terrain.

Because the sandy margins grade into grassland, loess and alluvium, this page does not add Kubuqi and Mu Us areas to manufacture a total. Their published polygons also overlap different definitions of “desert,” “sand sea,” “sandy land” and surrounding transition zones.

The Yellow River runs along the west, north and east of the Ordos Plateau. Beyond it, the Helan Mountains rise to the west, the Yin Mountains north of the Hetao Plain, and the Lüliang Mountains to the east. The southern edge grades into the dissected Loess Plateau.^[2]

The 86,752 km² plateau frame used in a 2005 wind-transport study extends from the Yellow River elbow south to the ancient Great Wall and places the regional surface mostly between 1,000 and 1,500 m above sea level.^[1] That is a reproducible research frame, not an official desert boundary.

Kubuqi occupies the northern Ordos Plateau immediately south of the Yellow River and Hetao lowland, entirely within Inner Mongolia. Mu Us lies farther south and southeast across southern Ordos City, northern Yulin in Shaanxi and northeastern Ningxia. One Landsat study bounded Mu Us at 37.45°–39.37° N and 107.67°–110.50° E; those coordinates describe that study polygon rather than immutable natural edges.^[4][5]

Kubuqi rises stepwise southward from the Yellow River margin and lies mainly at 1,000–1,400 m elevation. A 2025 field dataset sampled 1,980 surfaces across 396 areas and identified crescent dunes and chains, reticulate chains, compound dunes, parabolic dunes, shrub-coppice dunes and interdune lows. Compound dunes were reported at 50–100 m high in the west and 30–50 m in the east; smaller crescent forms generally decrease eastward from 10–30 m to 5–10 m.^[4]

Mu Us slopes broadly from northwest to southeast. The 2020 Landsat study reported a mean elevation of 1,254 m and a northwestern maximum of 1,595 m within its 42,200 km² frame.^[5] Its surface alternates among sandy tablelands, dune fields, river corridors, wetlands and depressions. A China Geological Survey-led regional assessment describes semi-fixed barchans—crescent dunes—as a prevalent form, commonly 5–15 m high in its mapped area.^[6]

Kubuqi is crossed by the “Ten Tributaries,” including the Hantaichuan, Xiliugou and Heilaigou. They descend from the northern plateau, cut south-to-north corridors through the dunes and enter the Yellow River. Their channels characteristically carry summer floods, remain dry or low in winter and transport abundant sand. Farther west, drainage is sparse and the Mo Lin River terminates within the desert rather than reaching the Yellow River.^[4]

Mu Us contains a sharper drainage divide. Its northwestern and west-central basins are endorheic: runoff ends inland. The southeastern exorheic sector drains outward through the Tuwei, Wuding and Kuye rivers, all within the Yellow River system.^[6] The river loop is therefore a regional boundary, not proof that every interior hollow drains to the main stem.

A 2022 lake-landform study reports 154 natural Mu Us lakes at least 0.1 km² in area. Within its closed-drainage inventory, 108 lakes totaling 301.1 km² were divided among 24 surface-water basins. Most occupy bedrock valleys or wind-shaped depressions and act as local discharge centres for surface runoff and shallow groundwater; these thresholded inventory figures should not be treated as timeless lake totals.^[9]

The visible sand rests on an older sedimentary platform. Mu Us tablelands expose mainly purplish-red Cretaceous and gray-green Jurassic sandstone, while depressions contain thick Pleistocene river-and-lake deposits. During cold, dry late-Pleistocene phases, exposed sediment was deflated and redeposited into dunes, leaving a repeated pattern of tableland, sand body and hollow.^[6]

Kubuqi is also not a simple deep pile of uniformly old sand. Field sections and optically stimulated luminescence (OSL) dating show Holocene aeolian units draped across bedrock and Yellow River or tributary terraces. The authors call it a palimpsest: a landscape in which newer wind deposits partly cover, but do not erase, older fluvial topography. Their dating constrains sampled deposits rather than assigning one birth date to every dune.^[3]

Geochemical fingerprints show that sand sources vary within the region. Local sandstone and lake sediment dominate eastern Mu Us samples, whereas western Mu Us and Kubuqi sands resemble Yellow River alluvium; the river sediment itself ultimately carries material from the northeastern Tibetan Plateau and Qilian source region. Wind thus redistributes sediment previously moved by rivers instead of producing all Ordos sand solely from nearby bedrock.^[2]

No single rainfall normal represents both sandy tracts. The 2025 Kubuqi dataset characterizes its western arid sector at about 150–250 mm annually and the eastern Dalate–Jungar sector at about 250–400 mm.^[4] For Mu Us, records from 11 national meteorological stations over 1982–2020 span 170–440 mm per year, decreasing from southeast to northwest; 60–75% fell from July through September.^[8]

That gradient reflects the meeting of continental and monsoonal circulation. Warm-season moisture reaches Mu Us from the southeast, while the Mongolian–Siberian high brings cold, dry northwesterly flow in winter. In a Mu Us dune study using 1979–2014 station winds, the principal sand-moving winds came from the northwest in spring, autumn and winter; gentler south-southeasterly winds dominated summer.^[7]

Seasonal opposition helps build reversing barchanoid dunes—ridges whose slip faces change orientation as effective wind direction changes. Vegetation and surface moisture reduce sand movement, so an active ripple or blowout does not mean an entire “desert” migrates as one body. Field measurements on Ordos surfaces found far greater transport from bare shifting dunes than from semi-fixed or fixed surfaces, with spring the main transport season.^[1]

The Yellow River supplies immediate source sediment to parts of Kubuqi and western Mu Us, while Kubuqi tributaries return locally eroded sandstone, loess and dune sand to the river. This two-way exchange links river terraces, flood channels, wind transport and dune construction across the northern plateau.^[2][4]

Southward, sandy tongues and sheets extend into the Loess Plateau transition; eastward-flowing Mu Us rivers become increasingly integrated with the Yellow River network. Within the Desert Hub, Ordos is therefore best understood as a Yellow River-loop plateau dryland. The wider Gobi Desert is a useful Inner Asian comparison, but it does not supply a more precise physical boundary for Ordos.

1. Liu, L. Y. et al., “Dune Sand Transport as Influenced by Wind Directions, Speed and Frequencies in the Ordos Plateau, China”, Geomorphology 67, 283–297 (2005). Source for the explicitly bounded 86,752 km² plateau study frame, its coordinate and elevation ranges, mapped surface units, field transport measurements and seasonal wind result.
2. Liu, Q. & Yang, X., “Geochemical Composition and Provenance of Aeolian Sands in the Ordos Deserts, Northern China”, Geomorphology 318, 354–374 (2018). Field sampling and major, trace and rare-earth-element analysis; source for regional names, margins and the contrasting eastern Mu Us, western Mu Us and Kubuqi sediment sources.
3. Yang, X. et al., “Initial Insights into the Age and Origin of the Kubuqi Sand Sea of Northern China”, Geomorphology 259, 30–39 (2016). Field stratigraphy and quartz OSL dating; source for the Holocene aeolian drape, buried bedrock and river terraces, tributary crossings and the palimpsest interpretation.
4. Xi, C. et al., “Comprehensive Particle Size Database of Surface Sediments from Different Dune Types in the Kubuqi Desert, China”, Scientific Data 12, 925 (2025). Desert-wide field dataset with 396 sample areas and 1,980 surface samples; source for the 17,300 km² frame, belt dimensions, 1,000–1,400 m elevation, dune forms and heights, precipitation zones and named drainage corridors.
5. Han, X. et al., “Spatiotemporal Dynamic Evolution and Driving Factors of Desertification in the Mu Us Sandy Land in 30 Years”, Scientific Reports 10, 21734 (2020). Six Landsat epochs from 1990–2017; source for the study polygon, 42,200 km² mapped frame, mean elevation and northwestern maximum. The area is a research boundary, not a legal perimeter.
6. Liu, J. et al., “Assessment of Ecological Geological Vulnerability in Mu Us Sandy Land Based on GIS and Suggestions of Ecological Protection and Restoration”, China Geology 8, 117–140 (2025). China Geological Survey-led regional survey and GIS assessment; source for administrative setting, relief, parent materials and the endorheic–exorheic drainage division.
7. Chen, J. et al., “The Effects of Seasonal Wind Regimes on the Evolution of Reversing Barchanoid Dunes”, Journal of Geophysical Research: Earth Surface 127, e2021JF006489 (2022). UAV terrain, sediment, station-wind and numerical-model study; source for the approximately 38,000 km² comparison frame, Mu Us dune forms and seasonal effective-wind directions.
8. Chen, Y. et al., “Vegetation Water Use Efficiency Constrains the Dynamic of Net Primary Productivity in Mu Us Sandy Land”, Frontiers in Plant Science 17, 1724283 (2026). Source for the 170–440 mm annual precipitation range and July–September concentration calculated from 11 national stations over 1982–2020.
9. Li, D. et al., “Quantitative Reconstruction of Precipitation and Lake Areas During Early to Middle Holocene in Mu Us Desert, North China”, Frontiers in Earth Science 10, 850633 (2022). Lake-landform mapping and hydrological modelling; source for the thresholded modern lake inventory, 24 closed basins, bedrock-controlled depressions and local surface-water–groundwater discharge pattern.