Land and Water Resources

Analysis of spatiotemporal evolution of land use and its driving mechanism in the agro-pastoral ecotone of Gansu Province using Geodetector

  • LI Wenxiu ,
  • YAN Zhengang
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  • 1. College of Science, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    2. College of Information Science and Technology, Gansu Agricultural University, Lanzhou 730070, Gansu, China

Received date: 2023-09-21

  Revised date: 2023-12-15

  Online published: 2024-04-26

Abstract

This study analyzed the land use structure, dynamics, intensity, and land use conversion of the agro-pastoral ecotone of Gansu Province from 2000 to 2020 using remote sensing (RS), geographic information system (GIS), and Geodetector in combination with social and economic data. (1) From 2000 to 2020, cultivated land, forest land, and grassland were the main land use types in the agro-pastoral ecotone of Gansu Province, and the total proportion of the three was more than 95%. The difference degree of land use structure was less than 0.01, and the structure was generally stable. The overall land use change initially increased and subsequently slowed down over time. (2) The conversion of cultivated land, forest land, and grassland accounted for more than 96% of the total conversion area in the agro-pastoral ecotone of Gansu Province. Land use conversion was observed among all land use types. Converted cultivated lands were mainly converted to forest land and grassland, whereas other land use types were converted to construction land. Land use type changes were mainly concentrated in the Loess hills in central Gansu and the Loess Plateau gully region in eastern Gansu. (3) In the context of long term land use changes, Geodetector demonstrated good applicability. The driving factors for land use changes in the farming-pastoral ecotone of Gansu varied during different periods. These changes were driven by a combination of socioeconomic factors and natural geographic factors, with the former having stronger explanatory power for land use change. Interactions among these factors exhibited either two-factor enhancement or nonlinear enhancement. Two-factor interactions had stronger explanatory power for land use changes than single-factor explanations.

Cite this article

LI Wenxiu , YAN Zhengang . Analysis of spatiotemporal evolution of land use and its driving mechanism in the agro-pastoral ecotone of Gansu Province using Geodetector[J]. Arid Zone Research, 2024 , 41(4) : 590 -602 . DOI: 10.13866/j.azr.2024.04.06

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