| The street not only represents the ecological environment and living environment quality of a city,but also shows the overall image and characteristics of a city.The index of green visual rate can obviously improve the visual landscape quality of street environment,and at the same time,it can reflect the overall quality of street space with quantitative form and more succinct greening information.In this paper,the visual virescence of street between two axes in Beijing and the survey of public satisfaction are analyzed,and the green visual characteristics of walking space in Beijing street are explored from the perspective of green visual rate.In order to quantitatively evaluate the visual effects of urban forest construction,to provide a space use mode and optimal green vision value in line with the principle of "people-oriented" for the future urban street space optimization and quality improvement,and also to provide a comfortable for people.Energetic,humanized street walking space.The main conclusions are as follows:(1)Through the investigation and analysis of the public satisfaction with the green visual rate of the street walking space,it is found that when the green vision rate is below 5,the public evaluation of the street walking space satisfaction is "very dissatisfied",and when the green vision rate is between 5% and 13%,When the green vision rate was between 13% and 20%,the public satisfaction rate of street walking space was "general",and when the green vision rate was between 20% and 40%,the public satisfaction rate on street walking space was "good".When the green vision rate is higher than 40,the public satisfaction with the walking space of the street is evaluated as "satisfactory".It can be seen that people's satisfaction with the green vision rate increases with the increase of the green vision rate index,and through the comparison,there is no significant difference between the satisfaction evaluation of different groups.(2)The street walking space between the axes of Beijing is evaluated according to the standard of green vision index grade.It can be seen that the average green visual rate of the street walking space is 30.51,and 66.33% of the observation points reach a good level,which indicates that the green vision rate construction level of the street walking space in Beijing is qualified as a whole.However,the average green visual rate of each street changes greatly,and the visible green construction presents a polarized state,and the higher the green vision rate is,the worse the visual stability of walking space is.(3)Through the correlation analysis of the factors that may affect the green vision rate of street walking space by SPSS,it is found that the street profile and street width have no obvious influence on the green vision rate for the street walking space in Beijing.However,some plant factors have a certain correlation with the green vision rate,but the correlation is not strong.None of the factors can strongly affect the change of the green vision rate of the street.The average green visual rate of walking space is the highest when the white wax is used as the street tree,that is to say,it is the most favorable to improve the green vision rate of the street when the white wax is used as the street tree in Beijing.(4)Based on the analysis of the observation points below the "qualified" line,the way to improve the green visual rate is put forward.First,for sites with green space,we can increase the area of greening by selecting suitable road trees to increase the visible green amount of walking space on the street;second,when there are no conditions for planting trees in the site,Can be through the development of three-dimensional greening to improve the green vision rate.At the same time,the case design demonstration of improving the green visual rate is also carried out for different situations.. |
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