Growth and decline of a sustainable city: A multitemporal perspective on blue-black-green infrastructures at the pre-Columbian Lowland Maya city of Tikal
本文通过分析蒂卡尔1500年的城市历史，探讨蓝黑绿（水、土壤、植被）基础设施如何支撑城市代谢，揭示长期可持续性概念在不同时间尺度下的矛盾与挑战，对研究城市转型的学者有参考价值。
The New Urban Agenda’s call for long-term visions in urban planning fails to recognise that ‘long-term’ implies different longevities depending on context of assessment. Compared to other social sciences, archaeological approaches add rigour to envisioning urban sustainability over several centuries and millennia. The archaeology of the pre-Columbian Lowland Maya urban tradition is an interesting case because data have been used to support conflicting arguments about Maya urban sustainability. We suggest that these contradictions can be partly explained by: (1) sustainability being ambiguously defined, (2) subsets of the urban system being expected to indicate the behaviour of other subsets or of the entire system, and (3) processes being evaluated using different timescales. Drawing on 1500 years of urban history at Tikal, this paper examines how archaeological perspectives add depth of reflection and unfold critical assumptions of the meaning of ‘long-term’ and ‘sustainability’ concealed in self-explanatory notions. We outline the development and longevity of urban settlement at Tikal and analyse the blue-black-green (water, soil, vegetation) infrastructures that sustained urban metabolism and sponsored basic urban functions. Our analyses contribute new insights on the challenges associated with future sustainability transitions over varying temporal scales. The diversity of past and present urban systems and infrastructural initiatives cannot be fitted within a single narrative of urban sustainability, however, and much research is required to examine how blue-black-green infrastructures can support transformative change of aggregated human population zones struggling with potable water scarcity, soil degradation, and habitat and biodiversity loss.