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A Study on the Impact of Roads on Grassland Degradation in Shangri-La City

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  • Zilin Zhou

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China)

  • Feng Cheng

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China)

  • Jinliang Wang

    (Faculty of Geography, Yunnan Normal University, Kunming 650500, China)

  • Bangjin Yi

    (Yunnan Institute of Geological Sciences, Kunming 650051, China)

Abstract

Shangri-La is located in the eastern part of the Qinghai-Tibet Plateau, which has a fragile ecology. The plateau grassland has suffered from irreversible degradation under the influence of human activities. To address this issue, the Sentinel-2A data obtained is used in this study to calculate the RVI and build an inversion model of grassland degradation grade with GDI data, which was used to obtain the area and proportion of grassland degradation. Landscape indexes were then calculated for different degradation grades of grassland to examine the correlation between roads and degraded grassland in spatial distance and the spatial distribution characteristics of different degradation grades of grassland. The results show that the grassland area in Shangri-La was 2207.94 km 2 , of which the heavily degraded area reaches 824.03 km 2 , exceeding the undegraded grassland area by 172.62 km 2 , indicating that the grassland degradation is severe. From south to north, the proportion of heavily degraded and moderately degraded grassland in townships gradually decreased, while the proportion of lightly degraded and undegraded grassland gradually increased. The townships with high percentages of degraded grassland were predominantly located in the southern area, where there was a dense road network and well-developed transport networks, particularly along National Highway 214, which is the main road in Shangri-La. Conversely, townships with low percentages are generally located in the north with dispersed roads and sparse transport lines. The study’s outcomes are significant in providing a better understanding of the current status of grassland degradation and promoting the sustainable utilization of grassland resources in Shangri-La.

Suggested Citation

  • Zilin Zhou & Feng Cheng & Jinliang Wang & Bangjin Yi, 2023. "A Study on the Impact of Roads on Grassland Degradation in Shangri-La City," Sustainability, MDPI, vol. 15(10), pages 1-16, May.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:10:p:7747-:d:1142463
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    References listed on IDEAS

    as
    1. Zheng, Xinyi & Zhang, Junze & Cao, Shixiong, 2018. "Net value of grassland ecosystem services in mainland China," Land Use Policy, Elsevier, vol. 79(C), pages 94-101.
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