Studying the Physical Environment of the Chengdu-Demian Economic Circle on Combination Game Theory

A vital component of the urban system, the urban physical environment plays a critical role in information delivery, and the quality of it directly impacts on the viability of cities. Based on the Chengdu-Demian Economic Circle, a more systematic evaluation index system for the urban physical environment was developed in this research. The Combination game theory (CMG) and the improved TOPSIS were adopted to assess the condition of the physical environment in the area. The results of the study revealed that the quality of the physical environment in the Chengdu-Demian Economic Circle was negatively affected by the local natural environment, particularly the scarcity of water resources. Over the study period, there was a pulsating upward trend in the level of geo-environmental conditions in Chengdu-Demian, primarily related to enhancements in water quality, greening levels and sewage treatment capacity. However, the overall state of the physical environment in the Chengdu-Demian Economic Circle is generally unsatisfactory, especially in Deyang, where the average environmental quality remains consistently poor. In conclusion, the physical environment in the Chengdu-Demian Economic Circle exhibited certain issues and challenges that necessitate further efforts in environmental protection and urban greening.