City and regional planners have recently started exploring a circular approach to urban development. Meanwhile, industrial ecologists have been designing and refining methodologies to quantify and locate material flows and stocks within systems. This Perspective explores to which extent material stock studies can contribute to urban circularity, focusing on the built environment. We conducted a critical literature review of material stock studies that claim they contribute to circular cities. We classified each article according to a matrix we developed leveraging existing circular built environment frameworks of urban planning, architecture, and civil engineering and included the terminology of material stock studies. We found that, out of 271 studies, only 132 provided information that could be relevant to the implementation of circular cities, albeit to vastly different degrees of effectiveness. Of these 132, only 26 reported their results in a spatially explicit manner, which is fundamental to the effective actuation of circular city strategies. We argue that future research should strive to provide spatial data, avoid being siloed, and increase engagement with other sociopolitical fields to address the different needs of the relevant stakeholders for urban circularity.

中文翻译：

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存量研究如何助力城市循环经济的实施？

城市和区域规划者最近开始探索城市发展的循环方法。与此同时，工业生态学家一直在设计和改进方法，以量化和定位系统内的物质流和存量。这一观点探讨了材料存量研究在多大程度上可以促进城市循环，重点关注建筑环境。我们对材料库存研究进行了批判性文献回顾，这些研究声称它们有助于循环城市。我们根据我们利用城市规划、建筑和土木工程的现有循环建筑环境框架开发的矩阵对每篇文章进行分类，并包括材料库存研究的术语。我们发现，在 271 项研究中，只有 132 项提供了可能与循环城市实施相关的信息，尽管有效性的程度大不相同。在这 132 个中，只有 26 个以空间明确的方式报告了他们的结果，这对于有效启动循环城市战略至关重要。我们认为，未来的研究应努力提供空间数据，避免孤立，并增加与其他社会政治领域的接触，以解决相关利益相关者对城市循环的不同需求。