Research On Coupling Evaluation Of Visual Quality And Thermal Comfort Of Urban Park Landscape

In the context of today’s rapid economic development,people’s increasing requirements for quality of life have gradually increased people’s attention to urban parks.Urban park is to meet the leisure and recreation needs of urban residents on the basis,through the park landscape space division,so that people in different spaces will have a unique landscape visual perception and thermal comfort feeling,the coupling research of landscape visual quality and thermal comfort in its internal landscape space can scientifically and effectively guide the planning and design of urban parks,which is conducive to better guiding people to choose time and space,and then improve people’s viewing experience.However,there are few relevant studies on the coupling evaluation of landscape visual quality and thermal comfort,and most of them are still in the separate research on landscape visual quality evaluation or thermal comfort evaluation,which may lead to the potential of some landscape places cannot be fully activated.Therefore,by drawing on the research ideas and methods of various disciplines,this paper selects 15 landscape points in the 3 km fitness trail of Beijing Olympic Forest Park as the research objects,and explores from the aspects of coupling landscape visual quality evaluation and thermal comfort evaluation.The basic visual elements and visual sensitivity in the visual quality of the landscape were selected to calculate the spatial distribution of the landscape,and five indicators including line of sight,viewshed,relative distance sensitivity,relative slope sensitivity and landscape striking were analyzed by using GIS.Then,the measurement of PMV thermal comfort index based on field physical measurement was selected for continuous measurement,and three time periods of 8:00-11:00,11:00-14:00 and 14:00-17:00 were selected within one day,and the spatial distribution map of PMV thermal comfort level landscape in each time period was obtained after being brought into GIS.Finally,according to the time period series,for the young and middle-aged fitness groups of the research population,the superimposed weight of landscape vision and thermal comfort was determined by using on-site interviews and questionnaire survey statistics,and GIS was used to conduct the coupling evaluation of landscape visual quality and thermal comfort,and finally obtained the landscape dynamic evaluation results in three time periods.The results of coupled superposition evaluation and analysis show that the visual experience and physical sensory experience brought by the landscape space in the 3 km fitness trail of Aosen Park change with the difference of time and space,which has obvious time and space effects,causing the difference in the results of the coupled evaluation index.In October8:00-11:00 and 14:00-17:00,the landscape space area of low-level superposition effect is > the difference horizontal superposition effect landscape space area> medium horizontal superposition effect landscape space area> the high-level superposition effect landscape space area,in October 11:00-14:00,the poor horizontal superposition effect landscape space area >low-level superposition effect landscape space area> medium horizontal superposition effect landscape space area > High level overlay effect landscape space area.In general,the landscape space area of low and poor horizontal superposition effect is the area with a large proportion,most of which is located on the east and west sides of the study area,which belongs to the area with poor location of landscape points and slightly inferior landscape richness,coupled with insufficient infrastructure in the site,resulting in average comfort,so the overall presentation effect after superposition is the worst;Most of the medium and high level attractions are located in the middle of the study area,which belongs to the area with better visual location and rich landscape,and the rich plants and other elements in the site bring good comfort,so the effect is better than other after superposition.Based on the results obtained by the coupling evaluation and analysis,summarize the current situation in the research area,this article puts forward corresponding optimization suggestions for the landscape space in the research area of the Ossen Park,and is optimized and upgraded.Start on research,and to achieve the optimization of landscape space by protecting the landscape visual classification,the protection of thermal comfort,and the combined spatial space protection.The results of this research provides more scientific and orderly ideas and methods for quantitative evaluation of city park landscape vision and thermal comfort.The relationship between the environment-people".