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The Spatial–Temporal Characteristics of Land De-Urbanization in Metropolises: A Case Study of the Guangdong–Hong Kong–Macao Greater Bay Area

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  • Xiaochun Chen

    (Key Laboratory of the Ministry of Natural Resources for Natural Resources Monitoring in Tropical Subtropics of South China, School of Public Administration, South China Agricultural University, Guangzhou 510642, China)

  • Yongni Zhou

    (Key Laboratory of the Ministry of Natural Resources for Natural Resources Monitoring in Tropical Subtropics of South China, School of Public Administration, South China Agricultural University, Guangzhou 510642, China)

  • Hanbing Zhao

    (Guangdong Engineering Research Center of Land Information Technology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China)

  • Jinhao Zhou

    (Guangdong Engineering Research Center of Land Information Technology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China)

  • Yilun Liu

    (Key Laboratory of the Ministry of Natural Resources for Natural Resources Monitoring in Tropical Subtropics of South China, School of Public Administration, South China Agricultural University, Guangzhou 510642, China)

Abstract

With a series of redevelopment activities, such as land consolidation and urban renewal, many cities in China have experienced land de-urbanization phenomena. These include the conversion of construction land into green spaces (such as parks, forests, and lawns), blue spaces (such as rivers, lakes, and wetlands), and farmland. However, there is currently limited research on diverse land de-urbanization types and pathways. This study focuses on investigating the land de-urbanization in the Guangdong–Hong Kong–Macao Greater Bay Area (GBA) from 2014 to September 2023 using the Continuous Change Detection and Classification (CCDC) method. The results demonstrate that the GBA experienced 72.74 square kilometers of de-urbanization during the study period, primarily through the conversion of construction land to land with low plant coverage, including grassland and farmland. There were significant differences in the quantity and spatial agglomeration of de-urbanization between cities and within individual cities. Temporally, de-urbanization predominantly occurred in the period of 2016 to 2021, with a sharp decline in 2022. The temporal changes were significantly influenced by urban renewal policies and the impact of the COVID-19 pandemic. In terms of spatial clustering characteristics, the de-urbanization process in the GBA exhibited spatial agglomeration but was primarily characterized by low-level clustering. This study also examines the correlations between de-urbanization and factors including location and the stage of urbanization. The analysis showed that de-urbanization within cities tended to concentrate near the main urban roads within a range of 10–30 km from city centers. The trend of de-urbanization followed a pattern that is consistent with the Northam curve, where de-urbanization tends to increase during the rapid urbanization phase and decline as urbanization reaches a mature stage. Overall, this study provides valuable insights for the redevelopment of construction land within the context of ecological civilization construction. It also offers suggestions for urban land development and redevelopment in metropolitan areas.

Suggested Citation

  • Xiaochun Chen & Yongni Zhou & Hanbing Zhao & Jinhao Zhou & Yilun Liu, 2024. "The Spatial–Temporal Characteristics of Land De-Urbanization in Metropolises: A Case Study of the Guangdong–Hong Kong–Macao Greater Bay Area," Land, MDPI, vol. 13(2), pages 1-21, January.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:2:p:168-:d:1330531
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    References listed on IDEAS

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    1. Krekel, Christian & Kolbe, Jens & Wüstemann, Henry, 2016. "The greener, the happier? The effect of urban land use on residential well-being," Ecological Economics, Elsevier, vol. 121(C), pages 117-127.
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