Abstract

Underground space has been widely used in densely populated cities across the globe, and is attracting increasing attention among academics and practitioners toward further alleviating land use pressure, improving urban resilience and the quality of life. However, few attempts have been made to probe the potential threats posed by underground space use to urban sustainability. Disregarding these threats and the socio-environmental losses accruing to unreasonable underground space use will lead to failure in the decision-making process, particularly the cost-benefit analysis, of underground space development and may to some extent compromise the urban sustainability. This research intends to investigate the potential socio-environmental losses caused by underground space use for urban sustainability from the perspectives of underground assets, including geothermal energy, groundwater, geomaterials, historical heritage, space continuum and organisms, based on their contributions to sustainable development goals (SDGs), and sets up a framework for the monetary valuation of these losses. It is anticipated that the findings of this study will assist the future planning and decision-making process in developing the sustainable urban underground space.

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