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Assessing How Land-Cover Change Associated with Urbanisation Affects Ecological Sustainability in the Greater Accra Metropolitan Area, Ghana

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  • John E. K. Akubia

    (Governance & Sustainability Lab., Faculty of Regional & Environmental Sciences, Trier University, Universitätsring 15, 54296 Trier, Germany)

  • Abubakari Ahmed

    (Department of Planning, Faculty of Planning and Land Management, University for Development Studies, Wa Campus, P.O. Box UPW3, Wa, Upper West Region GH.UW 1331, Ghana)

  • Antje Bruns

    (Governance & Sustainability Lab., Faculty of Regional & Environmental Sciences, Trier University, Universitätsring 15, 54296 Trier, Germany)

Abstract

Intensive land-cover changes (LCC) driven by unplanned urbanisation continue to threaten the sustainability of ecological assets in many cities in Africa. Evaluating the nature and processes of these changes is key to understanding the extent to which ecological instability may be affecting sustainability futures. This study employed integrated remote sensing, GIS, land accounting techniques and utilisation of high-resolution Quickbird and Worldview 2 images to analyse actual (2008–2017) and future (2017–2030) LCC and explored implications for ecological sustainability in the Greater Accra Metropolitan Area, Ghana. After mapping and classifying actual LCC, multi-layer perception (MLP) neural network and Markov chain were employed to predict future LCC for the year 2030. The results indicate that the built-up area increased substantially from 27% in 2008 to 46% in 2017 and is expected to rise to 73% by 2030. In contrast, open-space (10%), forestlands (5%) and grassland/farmlands (49%) decreased progressively (2008–2030). In effect, these land-cover types experienced area turnover ˃100% during the actual and predicted period, indicating high vulnerability of natural land cover to urban growth, ecological degradation and resource depletion. These findings highlight significant implications of LCC for ecological sustainability in the study area. A proactive land-cover/use management plan is necessary to ensure sustainable urban development and ecological land conservation.

Suggested Citation

  • John E. K. Akubia & Abubakari Ahmed & Antje Bruns, 2020. "Assessing How Land-Cover Change Associated with Urbanisation Affects Ecological Sustainability in the Greater Accra Metropolitan Area, Ghana," Land, MDPI, vol. 9(6), pages 1-18, June.
    • Handle: RePEc:gam:jlands:v:9:y:2020:i:6:p:182-:d:366075
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    References listed on IDEAS

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    1. Mansour, Shawky & Al-Belushi, Mohammed & Al-Awadhi, Talal, 2020. "Monitoring land use and land cover changes in the mountainous cities of Oman using GIS and CA-Markov modelling techniques," Land Use Policy, Elsevier, vol. 91(C).
    2. John E. K. Akubia & Antje Bruns, 2019. "Unravelling the Frontiers of Urban Growth: Spatio-Temporal Dynamics of Land-Use Change and Urban Expansion in Greater Accra Metropolitan Area, Ghana," Land, MDPI, vol. 8(9), pages 1-23, August.
    3. Korah, Prosper Issahaku & Matthews, Tony & Tomerini, Deanna, 2019. "Characterising spatial and temporal patterns of urban evolution in Sub-Saharan Africa: The case of Accra, Ghana," Land Use Policy, Elsevier, vol. 87(C).
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    Cited by:

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    2. Biao Zhang & Dian Shao & Zhonghu Zhang, 2022. "Spatio-Temporal Evolution Dynamic, Effect and Governance Policy of Construction Land Use in Urban Agglomeration: Case Study of Yangtze River Delta, China," Sustainability, MDPI, vol. 14(10), pages 1-36, May.

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