The rapidly changing landscape pattern of photovoltaic field in Kubuqi Desert from 2017 to 2024

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  • The photovoltaic field (PV) landscape represents an emerging phenomenon within arid regions and has become a hot topic of recent landscape ecology research. China is extensively developing PV and employing them as a strategic tool in the fight against desertification. Nevertheless, detailed study based on high-resolution data are lacking regarding the manner in which types of land occupied by PV, its rate of expansion, and the alterations in its spatial configuration. We analyzed 10-m resolution Sentinel-2 Multispectral Instrument (Sentinel-2) imagery over the Kubuqi Desert, a typical demonstration area in China for desertification control of photovoltaic, and map the PV expansion within a 3 km radius buffer zones around the PV of 2024 to analyze landscape change from 2017 to 2024. This study demonstrated that PV area increased from 11.14km2 in 2017 to 137.21km2 in 2024. PV area increased by only 1.19 km2 from 2017 to 2018 while 80.95 km2 from 2023 to 2024. Construction of PV mainly occupies sand and shrub. As of 2022, the completed PV occupied 42.34km2 of sand and 10.65km2 of shrub. Between 2022 and 2024, the rapid expansion of PV installations, with 91.73 % of new capacity constructed predominantly on sand. During the PV expansion, there is the apparent rise in the Percentage of Landscape (PLAND), Largest Patch Index (LPI), and Edge Density (ED), while the Perimeter-Area Fractal Dimension (PAFRAC) decreases, leading to a decrease in the area of sand landscape, a simplification of its shape, and an increased fragmentation. The transformation of the PV landscape plays a key role in reshaping and stabilizing sandy environments, offering a sustainable solution for desertification control and supporting the national strategic goal of carbon neutrality.