Spatiotemporal Variation in the Land Use/Cover of Alluvial Fans in Lhasa River Basin, Qinghai–Tibet Plateau

Tongde Chen, Juying Jiao (), Wei Wei, Jianjun Li, Ziqi Zhang, Haizhen Yang and Huifang Ma
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Tongde Chen: Laboratory of Land Resources Surveying and Planning, School of Politics and Public Administration, Qinghai Minzu University, Xining 810007, China
Juying Jiao: State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
Wei Wei: School of Automation, Northwestern Polytechnical University, Xi’an 710072, China
Jianjun Li: State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
Ziqi Zhang: State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
Haizhen Yang: Laboratory of Land Resources Surveying and Planning, School of Politics and Public Administration, Qinghai Minzu University, Xining 810007, China
Huifang Ma: Laboratory of Land Resources Surveying and Planning, School of Politics and Public Administration, Qinghai Minzu University, Xining 810007, China

Agriculture, 2023, vol. 13, issue 2, 1-17

Abstract: Alluvial fans are an important land resource with agricultural potential in Qinghai–Tibet Plateau. The spatiotemporal variation in land use/cover is an important indicator to understand the value of alluvial fans and protect and make scientific use of such fans. In this study, the spatiotemporal characteristics of land use/cover are determined by analysing the land use/cover changes of alluvial fans in the Lhasa River Basin (LRB) at different times, counties/districts, altitudes, and gradients. Results show that the area of cultivated land and the artificial land provided by alluvial fans for LRB has continuously increased. In 2000, 2010, and 2020, 17.72%, 21.84%, and 24.17% of cultivated land and 7.89%, 7.51%, and 25.24% of artificial land in LRB were provided by alluvial fans, respectively. At all altitudes and slopes, cultivated land and artificial land are increasing but the increasing part is basically due to the massive loss of grassland. The spatiotemporal changes in all land use/cover types of alluvial fans were dominated by human activities, although they were also influenced by natural factors to some degree.

Keywords: alluvial fan; land use/cover changing; Lhasa River Basin; Qinghai–Tibet Plateau (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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