Study On Restorative Potential Evaluation Of Road Characteristic Factors In Urban Parks

The process of urbanization has led to the health problems of urban residents,and the focus of urban park construction has gradually turning to public health.Road characteristic elements have direct or indirect effects on travel,behavior,psychological perception and health,and are important factors affecting the restoration effect of urban parks.However,there is still a lack of special research on the restoration effect of road characteristic elements of urban parks.This paper uses the method which combining field subjective evaluation with laboratory subjective and objective evaluation,introducing restorative effect theory and empirical method,and selects the extracted urban park road characteristic factors based on field environmental evaluation,and determines the characteristic factors that have a significant impact on restorative effect.Using virtual reality technology shows the scenes composed of significant characteristic factors measured at different scales.Finally,through objective and subjective evaluation,the optimal restorative effect scale measurement of significant characteristic factors is determined,and the Pearson correlation between real environment and virtual environment,objective recovery data and subjective recovery data is compared and analyzed.The results are as follows:(1)through field subjective evaluation,the significant characteristic factors affecting the restorative effect of roads at all levels of urban parks are selected: 7 in main roads,5 in secondary roads and 8 in paths.(2)Through objective restoration and subjective evaluation,it is found that the optimal scale of significant restorative characteristic factors in roads at all levels is as follows: there are a large number of flowers in main roads(ground,shrubs and trees all cover);6 or more plant colors;Soft paving;2-3 groups of recreational facilities in the road about every 150 m,high natural degree(natural layout of plants,natural material of facilities or imitation natural elements),and the spatial scale with height width ratio D/H>1are the optimal scale of significant characteristic factors of restorative ability.In the secondary roads,the type of lawn coverage(dense texture,light green color,high coverage and high average degree),more than 8 plant species,more than 2 kinds of pavement,quiet and comfortable feeling without interference,and the spatial scale with height width ratio D/H>1 are the optimal scale of significant characteristic factors of restorative ability.In the path,there are a large number of flowering plants(ground,shrubs and trees all cover),the pavement is flat(no concave convex material on the surface,and the collage is tight),the waterscape is wide,the terrain slope is 10%-20%,the road is straight,the shading degree is 25%-75%,and the spatial interface is blocked by 20%-40%,A high degree of naturalness(natural arrangement of plants,natural factors of facilities or imitation of natural elements)is the optimal scale of significant restorative feature factors.(3)According to the above conclusions,it is proposed that in the main roads,plants are rich in color with flowers;moderate soft and hard pavement with appropriate rest facilities;promoting wild and natural scale.In the secondary roads of urban parks,the lawn is well covered and the plant species are diversity;multiple paving types;Quiet and comfortable,appropriate spatial scale promotion strategy.In the urban park path,there are many flowers,dependent on water and undulating terrain;smooth in pavement;The promotion strategy of moderate shading,dense interface and straight and slow path.(4)Using correlation analysis and multiple linear regression,it is found that the objective recovery data is significantly correlated with the subjective recovery data,and the objective recovery data can predict and explain about 28.6% of the subjective recovery data.(5)Some of the demographic characteristics and interview characteristics have an impact on the recovery data.Using ANOVA analysis,it is found that 1)Age and residence time in the park will have a significant impact on the recovery score.2)Gender has a significant impact on all physiological data indicators.3)Education has a significant effect on diastolic blood pressure(DBP).3)Education and design professional background will also have a significant impact on psychological recovery data and restorative evaluation data.