Material metabolism and lifecycle GHG emissions of urban road system (URS)

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Material metabolism and lifecycle GHG emissions of urban road system (URS)
	Zhang, Zhiwei; Zhang, Xuanzhao; Guo, Zhen; Hu, Dan; Zhang, Peidong
刊名	JOURNAL OF CLEANER PRODUCTION
	2017-11-01
卷号	165 期号:1 页码:243-253
关键词	Urban Road System (Urs) Material Metabolism Greenhouse Gas (Ghg) Emission Life Cycle Assessment (Lca) Infrastructure Resource Management
英文摘要	The intensive activities of urban infrastructure construction lead to a considerable amount of materials flowing into cities. With these processes of material metabolism, a huge level of energy consumption occurs throughout the lifecycle. Identifying the metabolism processes enables decision makers to better understand the causes of resource and environmental issues, therefore to propose corresponding measures for optimizing urban management. Focusing on the road systems in megacities, we probed into the construction standards and conducted in-site surveying. Based on the stock model and inventory building, studies on the metabolic processes, lifecycle energy consumption, and GHG emissions were carried out. The results demonstrated that: 1) The current road system in Beijing features large stocks and small flows. In particular, the in-use stock is 164.6 Mt, mainly involving 13 types of general construction materials. Of the total stock, 79.2% is stored in roads, and the rest is stored in ancillary facilities. 2) Microcirculation roads account for relatively smaller proportions in road network rationing. Regulating the grade proportions and the spatial layouts are feasible ways to reduce the input of infrastructure resources. 3) The two main stages with massive GHG emissions are production and maintenance, in which clinker production is the largest contributing process. The key to solid waste control and emission reduction in the long term is to further improve the recycling rates and technique upgrading for new pavement materials, not simply prolonging the service years. (C) 2017 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39053]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Zhang, Zhiwei,Zhang, Xuanzhao,Guo, Zhen,et al. Material metabolism and lifecycle GHG emissions of urban road system (URS)[J]. JOURNAL OF CLEANER PRODUCTION,2017,165(1):243-253.
APA	Zhang, Zhiwei,Zhang, Xuanzhao,Guo, Zhen,Hu, Dan,&Zhang, Peidong.(2017).Material metabolism and lifecycle GHG emissions of urban road system (URS).JOURNAL OF CLEANER PRODUCTION,165(1),243-253.
MLA	Zhang, Zhiwei,et al."Material metabolism and lifecycle GHG emissions of urban road system (URS)".JOURNAL OF CLEANER PRODUCTION 165.1(2017):243-253.