Dynamic analysis of construction and demolition waste management model based on system dynamics and grey model approach

This study aimed to reduce the amount of illegally dumped waste by establishing a construction and demolition waste management model that uses the approach of integrating system dynamics and grey model theory. First, we introduced the variable of penalty, and the sensitivity analyses of penalty and waste disposal charging fee were conducted to obtain reasonable values. Secondly, 27 scenarios were designed to explore a construction and demolition waste management strategy. The simulation results demonstrated that combination policies can not only greatly decrease the amount of illegally dumped waste (via penalty policy) and the amount of construction and demolition waste landfilling (via waste disposal charging fee) but also effectively improve the recycle rate of wastes (via a appropriate subsidy policy). Lastly, by comparing different combination of policies, some solutions were obtained. Some policy recommendations for construction and demolition waste management and emission reduction were put forward.

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