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Spatial Layout Assessment of Urban Mining Pilot Bases in China Based on Multi-Source Data Collaboration

Author

Listed:
  • Huimin Liu

    (School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)

  • Mengqian Xu

    (School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)

  • Xuexi Yang

    (School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)

  • Yan Shi

    (School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)

  • Min Deng

    (School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)

Abstract

Rapid urbanization in China has led to an exponential increase in the stocks of metals used in cities. Exploring their amount and growth patterns is an important way to forecast future metal demand and identify the potential for urban mining. Here, we use a combination of bottom-up and GIS tools to estimate the amount of in-use stocks and scrap metal of steel, copper, and aluminum in 366 regions of mainland China from 2010 to 2020. We then downscaled the 2020 metal scrap volume based on a multi-source dataset of socioeconomic factors. Finally, the accessibility of the urban mining pilot base (UMPB) was calculated using the two-step floating catchment area method (2SFCA), and the spatial layout assessment analysis of the UMPB was conducted under the supply–demand balance perspective. The results showed that the total in-use stocks of steel, copper, and aluminum increased from an initial 3186 million tons to 5216 million tons, with a corresponding trend of continued growth in the amount of metal scrap. The high value of scrap metal in 2020 is concentrated in the Beijing–Tianjin–Hebei urban agglomeration, the Yangtze River Delta region, and the Chengdu–Chongqing metropolitan area. The accessibility results show that the road network distance-based accessibility covered a smaller area than the Euclidean distance-based accessibility, but when the UMPB service radius was set to 300 km, the road network distance-based accessibility could also cover most of the eastern part of China. The spatial evaluation results of UMPB show that for service radii of 200 km and 300 km, low-supply and high-demand areas account for 6.32 percent and 5.89 percent, respectively.

Suggested Citation

  • Huimin Liu & Mengqian Xu & Xuexi Yang & Yan Shi & Min Deng, 2023. "Spatial Layout Assessment of Urban Mining Pilot Bases in China Based on Multi-Source Data Collaboration," Sustainability, MDPI, vol. 15(10), pages 1-21, May.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:10:p:7977-:d:1146220
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    References listed on IDEAS

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