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Land Use Change and Landscape Ecological Risk Assessment Based on Terrain Gradients in Yuanmou Basin

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  • Lei Zhao

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China
    Yunnan Key Laboratory of Plateau Geographical Processes & Environmental Changes, Kunming 650500, China)

  • Zhengtao Shi

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China
    Yunnan Key Laboratory of Plateau Geographical Processes & Environmental Changes, Kunming 650500, China)

  • Guangxiong He

    (Tropical Eco-Agriculture Research Institute, Yunnan Academy of Agricultural Sciences, Yuanmou 651300, China
    National Soil and Water Conservation Science and Technology Demonstration Park of Yunnan Yuanmou Jinlei, Yuanmou 651300, China)

  • Li He

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China
    Yunnan Key Laboratory of Plateau Geographical Processes & Environmental Changes, Kunming 650500, China)

  • Wenfei Xi

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China
    Yunnan Key Laboratory of Plateau Geographical Processes & Environmental Changes, Kunming 650500, China)

  • Qin Jiang

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China
    Yunnan Key Laboratory of Plateau Geographical Processes & Environmental Changes, Kunming 650500, China)

Abstract

Investigating the distribution characteristics of landscape ecological risk (LER) on terrain gradients is of great significance for optimizing the landscape pattern of ecologically vulnerable areas in mountainous regions and maintaining the sustainable development of the ecological environment. The Yuanmou Basin is a typical ecologically vulnerable area in the southwestern mountainous region of China, where issues such as soil erosion are pronounced, becoming one of the main factors restricting regional economic development. This study selected the Yuanmou Basin as the study area, and, using land use data from 2000, 2010, and 2020, constructed an LER assessment model based on disturbance and vulnerability. By integrating elevation and topographic position index data, we examined the spatiotemporal evolution characteristics of LER under different terrain gradients. The LER assessment results are summarized as follows: (1) From 2000 to 2020, the land use types of the Yuanmou Basin were mainly grassland, forest land and cropland. The land use showed a sharp increase in the cropland area and a simultaneous decrease in the grassland area, indicating a main land use evolution direction from grassland to cropland. (2) Over the span of 20 years, the average landscape ecological risk in the Yuanmou Basin slightly increased, specifically manifesting as a significant reduction in low ecological risk areas, while areas of medium and slightly lower ecological risks saw an increase. (3) The spatial distribution of LER in the Yuanmou Basin presents a pattern of being low on the periphery and high in the center, with significant positive spatial correlation, obvious spatial aggregation, as well as “high-high” and “low-low” clustering. (4) Low- and lower-risk areas in the Yuanmou Basin are distributed in the non-arid thermal zone and the medium–high terrain zone, while areas of medium, higher and high risk levels are mainly distributed in the arid thermal zone and the low terrain zone. The research results provide a scientific basis for optimizing and developing the land resources of the Yuanmou Basin.

Suggested Citation

  • Lei Zhao & Zhengtao Shi & Guangxiong He & Li He & Wenfei Xi & Qin Jiang, 2023. "Land Use Change and Landscape Ecological Risk Assessment Based on Terrain Gradients in Yuanmou Basin," Land, MDPI, vol. 12(9), pages 1-19, September.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:9:p:1759-:d:1236940
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    References listed on IDEAS

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