The Influence Of Hangzhou Urban Landscape Pattern And Park Green Spaces On Dengue Fever Risk And Landscape Optimization Strategies

In recent years,rapid urbanization has led to the expansion of mosquito-borne diseases in urban areas,but the underlying mechanisms of transmission are still unclear.Furthermore,traditional infectious disease prevention and control measures are often taken after the outbreak of the disease.This study aims to explore the relationship between landscape environmental factors and spatial dengue fever risk from the perspective of dengue fever prevention and control,as well as the intersection of urban landscape patterns and urban parks,using quantitative research methods to guide the construction of spatial prevention and control strategies for dengue fever and the enhancement of park landscape hygiene and epidemic prevention functions.This study takes the main urban area of Hangzhou and 14 different types of Hangzhou parks as research sites from two scales of the city and park.The relationship between urban landscape spatial elements and dengue fever risk is studied to propose accurate spatial prevention and control strategy recommendations and park landscape design strategies.Dengue fever case spatial site data from 2017 to 2019 were obtained from the Hangzhou Center for Disease Control and Prevention,and urban landscape spatial structure-related factor data were obtained through an open network database.Two mosquito capture experiments and plant diversity surveys were conducted in each of the 14 parks in July and September 2022,and 307 effective questionnaires on visitor perceptions were distributed,obtaining mosquito numbers,plant conditions,meteorological data,and visitor awareness of dengue fever.Finally,spatial autocorrelation,GLM,and GWPR models were used to explore the spatial pattern characteristics of dengue fever in Hangzhou and the relationship between dengue fever risk and urban landscape factors,urban social gathering points,park landscape characteristics,and park visitor perceptions.Statistical analysis results and prediction models were used to propose corresponding optimization strategies for urban landscape patterns and park landscape design optimization with dengue fever prevention and control as the goal.The main conclusions of the study are:(1)Hangzhou’s landscape pattern has significant east-west and urban-rural differences.The spatial distribution of dengue fever in Hangzhou exhibits a pattern of "high concentration in the city center,low dispersion in the city periphery."(2)The density of vegetable markets is the urban landscape structural variable that has the greatest impact on dengue fever risk and is positively correlated with dengue fever risk in the middle and high-risk areas.The shape of the water body is positively correlated with dengue fever risk throughout the region.(3)The dengue fever risk in the park service area is positively correlated with the type of grass planted and negatively correlated with the number of tree species.(4)The park water and plant spaces preferred by visitors overlap with spaces where mosquitoes are often bitten.(5)With dengue fever prevention and control as the goal,appropriate optimization strategies for reducing the "bay stream" of edge water bodies and reducing the density of vegetable markets should be proposed for urban landscape optimization.Park landscape optimization should determine the location of dengue fever prevention and control functions based on risk levels and use low-density planting of grass and tree arrays for squares.