Graduate School of Economics, Waseda University, Tokyo, Japan.
Environ Sci Technol. 2011 Feb 1;45(3):1114-20. doi: 10.1021/es1024299. Epub 2010 Dec 21.
Identification of the flow of materials and substances associated with a product system provides useful information for Life Cycle Analysis (LCA), and contributes to extending the scope of complementarity between LCA and Materials Flow Analysis/Substances Flow Analysis (MFA/SFA), the two major tools of industrial ecology. This paper proposes a new methodology based on input-output analysis for identifying the physical input-output flow of individual materials that is associated with the production of a unit of given product, the unit physical input-output by materials (UPIOM). While the Sankey diagram has been a standard tool for the visualization of MFA/SFA, with an increase in the complexity of the flows under consideration, which will be the case when economy-wide intersectoral flows of materials are involved, the Sankey diagram may become too complex for effective visualization. An alternative way to visually represent material flows is proposed which makes use of triangulation of the flow matrix based on degrees of fabrication. The proposed methodology is applied to the flow of pig iron and iron and steel scrap that are associated with the production of a passenger car in Japan. Its usefulness to identify a specific MFA pattern from the original IO table is demonstrated.
确定与产品系统相关的物质流和材料流为生命周期分析（LCA）提供了有用的信息，并有助于扩大 LCA 和物质流分析/物质流分析（MFA/SFA）之间互补的范围，这两种方法是工业生态学的两个主要工具。本文提出了一种基于投入产出分析的新方法，用于确定与给定产品单位生产相关的单个材料的物理投入产出流，即单位材料物理投入产出（UPIOM）。虽然 Sankey 图一直是 MFA/SFA 的可视化标准工具，但随着所考虑的流量的复杂性的增加，当涉及到经济范围内的物质部门间流量时， Sankey 图可能变得过于复杂而无法有效可视化。本文提出了一种替代的可视化材料流的方法，该方法利用基于制造程度的流量矩阵的三角剖分。所提出的方法应用于与日本乘用车生产相关的生铁和钢铁废料的流动。展示了从原始 IO 表中识别特定 MFA 模式的有用性。
