Research on the influence mechanism of park landscape characteristics on psychological perception around expressway based on soundscape theory: a case study of Chengdu Bailuwan Wetland Park

With the continuous development of China's transportation infrastructure strategies and urbanization, urban road networks have seen ongoing improvement. Yet noise pollution along expressways is gradually becoming a prominent issue within the broader challenge of urban noise. Noise control has recently emerged as a bottleneck for building livable cities, while well-designed landscapes can improve the quality of psychological perception. By precisely quantifying the multi-sensory composite perception characteristics of urban green space landscapes, this research explores the mechanism through which such landscapes influence psychological perception. The study site was selected in Bailuwan Wetland Park, Chengdu. Objective and subjective environmental data and questionnaire feedback were collected through sound walks and big data analysis based on the geographic information system, after which quantitative analysis was conducted on how landscape environmental characteristics influence environmental experiential perception. The research explores the mechanism of the influence of the regulation of landscape environment characteristic elements on psychological perception and constructs a visual prediction model to provide a universal theoretical basis and methodological support for the planning and regulation of urban green space landscape along expressways, which is of positive significance in guiding the regulation of landscape space.