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An environmental assessment model of construction and demolition waste based on system dynamics: a case study in Guangzhou

  • Environmental Toxicology and Biogeochemistry of Ecosystems
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Abstract

At present, China is in the rapid development stage of urbanization, and construction activities are becoming more frequent. This is accompanied by a large amount of construction and demolition waste (C&DW), which raises many problems with its governance, such as occupying valuable land resources, causing air pollution, and consuming raw materials. In this study, taking Guangzhou as an example, the system dynamics principle was used to establish an environmental assessment model of C&DW, and Vensim software was used to simulate and analyze the environmental, economic, and social impacts of various disposal methods of C&DW. The results showed that (1) among all waste disposal methods, landfill disposal had the highest greenhouse gas emissions. It was estimated that the greenhouse gas emissions from landfill disposal will account for 75% of the total emissions in 2030, while the greenhouse gas emissions from recycling disposal will only account for 0.5%. (2) The simulation results showed that, according to the current data, the land area occupied by waste landfills and illegal dumping in 2030 will be about 4.88 million m2, and the economic loss caused by land loss and global warming will account for 9.1% of Guangzhou’s GDP in 2030, which is equivalent to the national economy of a regional city with a less developed economy. (3) Enhanced supervision could significantly reduce the amount of illegal dumping, but its effect on landfill disposal and recycling would be very limited. According to the results of the simulation analysis, some suggestions were put forward to improve the environmental, economic, and social impact of C&DW disposal in Guangzhou.

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Acknowledgments

This work was funded by the Humanities and Social Sciences Projects of Ministry of Education (No. 18YJA630113), the National Natural Science Foundation of China (No. 71501052), the “13th Five-Year” Plan of Philosophy and Social Sciences of Guangdong Province (No. GD19CGL23), the Humanities and Social Sciences Projects of Guangdong General Universities (No. 2017WTSCX097), and “University Innovation and Strong” Projects of Education Bureau of Guangdong Province (No. 2016WQNCX120). The author would like to acknowledge the valuable suggestions of the editor and three anonymous reviewers.

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Correspondence to Xuetong Wang.

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Responsible editor: Philippe Garrigues

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Appendices

Appendix 1

Table 4 Variables and equations of the construction and demolition waste (C&DW) environmental assessment model

Appendix 2

Table 5 Setting of relevant parameters of the construction and demolition waste environmental assessment model

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Liu, J., Liu, Y. & Wang, X. An environmental assessment model of construction and demolition waste based on system dynamics: a case study in Guangzhou. Environ Sci Pollut Res 27, 37237–37259 (2020). https://doi.org/10.1007/s11356-019-07107-5

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  • DOI: https://doi.org/10.1007/s11356-019-07107-5

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