From urban underground space (UUS) to sustainable underground urbanism (SUU): Shifting the focus in urban underground scholarship

Abstract This viewpoint argues that for sustainable urban development the relationship between the city and the ground beneath it needs increased attention. The underground volume might provide additional urban space, but it cannot be treated in the same way as above-ground space. Cross-disciplinary research and professional collaboration are needed to better understand (a) the variety of processes at play, and (b) the role of geotechnical engineers and geoscientists in working towards sustainable underground urbanism.