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Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (1): 204-214.DOI: 10.7522/j.issn.1000-694X.2024.00154

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Change characteristics of spatial distribution pattern of sandy land in Gonghe Basin

Na Gao(), Guangyin Hu(), Zhibao Dong   

  1. School of Geography and Tourism,Shaanxi Normal University,Xi'an 710119,China
  • Received:2024-09-29 Revised:2024-11-07 Online:2025-01-20 Published:2025-01-13
  • Contact: Guangyin Hu

Abstract:

The spatial distribution pattern of sandy land is the result of long-term erosion, transport and accumulation by wind after the sediment sinks by the action of running water. To quantitatively assess the spatial distribution pattern of sandy land and analyze its change characteristics, we selected Gonghe Basin, located in the northeastern Tibetan Plateau, as the study area. Utilizing landuse data from 1980 to 2020, this study adopted the geographical barycenter model and introduced the Migration Intensity Model to calculate the barycenter and migration intensity of sandy land, enabling an analysis of change characteristics of spatial distribution pattern of sandy land in the Gonghe Basin. The main conclusions are as follows: The migration distance of sandy land in the Gonghe Basin decreases from northwest to southeast. The Shazhuyu River Basin has the greatest distance at 43.43 km, followed by the combined area of the Shazhuyu River Basin and the western Longyangxia Basin at 39.93 km. The area including the Shazhuyu River Basin, western, and eastern Longyangxia Basin has a smaller distance of 31.88 km, with the smallest distance of 5.74 km in the eastern Longyangxia Basin. The predominant migration direction of sandy land throughout the basin is toward the southeast (99.46°-126.80°). The migration intensity in the basin decreases from northwest to southeast, with values of 0.83 in the Shazhuyu River Basin, 0.61 in the combined Shazhuyu River and western Longyangxia basins, 0.30 in the Shazhuyu River, western and eastern Longyangxia basins, and 0.15 in the eastern Longyangxia basin. The analysis reveals that the spatial distribution pattern of sandy land in the Gonghe Basin exhibits limited temporal variation, indicating a relative stability shaped by the long-term influence of regional environmental factors.

Key words: spatial distribution pattern, migration intensity, geographical barycenter, sandy land, Gonghe Basin

CLC Number: