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Mapping the material stock of the City of Melbourne's building using a bottom-up approach and open data.

par Stephan, André ;Athanassiadis, Aristide
Référence Proceedings of ISIE, International Society for Industrial Ecology SEM section conference
Publication Publié, 2016-09-28

Abstract de conférence

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Résumé :

Urban areas are responsible for a great share of non-renewable materials consumption. The unsustainable rates of material extraction and consumption not only lead to the depletion of natural resources but also result in serious environmental issues such as climate change, deforestation, loss of biodiversity, etc. By reusing, repairing and recycling materials that transit through urban areas it would be possible to tackle this dual challenge. An extensive circularisation of material flows at local and global scales is however often hard to achieve due to insufficient and inaccurate quantification of the materials that are stocked within cities. In fact, a more systemic and comprehensive assessment of urban material stocks could enable to significantly reduce both urban material waste and consumption of raw natural resources.This research develops a comprehensive bottom-up material stock model that enables to evaluate the quantity and mass of materials present in the buildings of the City of Melbourne. Depending on the land use, year of construction and height of the buildings; a number of archetypes were modelled taking into account their 3D geometry (not only their floor area), their building assemblies, as well as the materials making up these assemblies. By mapping the material stock of Melbourne with the proposed model it will be possible to know where and when different materials and buildings assemblies will become available with a great level of spatial and temporal detail. This disaggregated model could therefore depict urban areas as mines of secondary resources that could be economically valorised by applying circular economy principles within the built environment. Finally, this model could serve in the future to measure the embodied energy, water and carbon of materials within cities which could in turn inform them about the environmental footprint of new and existing built environments.