Purpose: As one of the most important overhead capital of urban economics and social\uddevelopment, the sustainable development of urban infrastructure is becoming a key issue of\udprosperous society growing. The purpose of this paper is to establish a basic model to analysis\udcertain infrastructure project’s sustainable construction and operation.\udDesign/methodology/approach: System dynamics is an effective stimulation method and\udtool to deal with such complex, dynamics, nonlinear systems, which could be used in analyzing\udand evaluating all aspects of infrastructure sustainability internally and externally. In this paper,\udthe system is divided into four subsystems and 12 main impact indicators.\udThrough setting the boundary and other basic hypothesis, this paper designs the basic causal\udloop diagrams and stock & flow diagrams to describe the relationship between variables and\udestablish a quantifiable structure for the system.\udFindings: Adopting a sewerage treatment in China as a case to test our model, we could\udconclude that the model of internal sustainable subsystem is reasonable. However, this model is\uda basic model, and it need to be specific designed for the certain project due to the diversity of\udinfrastructure types and the unique conditions of each projects.\udOriginality/value: System Dynamics (SD) is widely used in the study of sustainable\uddevelopment and has plentiful research achievements from macro perspective but few studies in\udthe microcosmic project systems. This paper focuses on the unique characteristics of urban infrastructure in China and selects infrastructure project which is based on micro-system\uddiscussion. The model we designed has certain practical significance in policy setting, operation\udmonitoring and adjustment of the urban projects with high rationality and accuracy.
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