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Comprehensive evaluation of the structural characteristics of an urban metabolic system: Model development and a case study of Beijing

机译:城市新陈代谢系统结构特征的综合评估:模型开发与北京案例研究

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摘要

The resource shortages and environmental problems that cities face can be attributed to their increasing metabolic throughflow and their metabolic inefficiency. To support urban ecological management, it is necessary to identify the main metabolic actors responsible for these problems and analyze the characteristics of their metabolic structure. In this paper, we divide a typical urban metabolic system into seven components. Using material-flow analysis, we accounted for the amounts of resources and wastes transferred among the system’s components and between the system and its environment, using Beijing from 1998 to 2007 as a case study. We used four indicators (metabolic scale, intensity, efficiency, and impact) to represent the inner structural characteristics of the urban metabolic system and analyzed the system based on the proposed indicators. The results provide scientific support for identifying the key metabolic actors responsible for urban metabolic disorders by accurately characterizing the city’s metabolic status.
机译:城市面临的资源短缺和环境问题可归因于其不断增加的新陈代谢流量和新陈代谢效率低下。为了支持城市生态管理,有必要确定造成这些问题的主要代谢参与者,并分析其代谢结构的特征。在本文中,我们将典型的城市新陈代谢系统分为七个部分。使用物料流分析,我们以北京为1998年至2007年的案例研究为基础,计算了系统各个组件之间以及系统与环境之间转移的资源和废物数量。我们使用四个指标(代谢规模,强度,效率和影响)来表示城市新陈代谢系统的内部结构特征,并根据提出的指标对系统进行了分析。结果通过准确表征城市的新陈代谢状态,为确定导致城市新陈代谢失调的关键新陈代谢行为提供了科学依据。

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