Research On Service Level Of Park Green Space In Nanchang City

As an important part of the urban landscape,park green space not only meets the needs of the urban population who have long lived in a high-pressure,fast-paced environment,but also becomes the main way for urban residents to access nature.With the rapid urbanization and the development of new urbanization,the urban population has increased dramatically.The rationality of the distribution of park green space and urban population,the convenience of urban residents to reach the park,the service efficiency and fairness of urban park green space have received increasing attention.This study uses ArcGIS analysis tools to study the park green space in Nanchang City,combined with high-resolution images and statistical data such as remote sensing images and Google Earth,using the three indicators of park green space accessibility,service efficiency and fairness.The overall service level of park green space in Nanchang City.First,combined with statistics and planning data,obtain data on park green space,roads,population,etc.,and vectorize road and park green space data through ArcMap 10.2;secondly,according to the relevant properties of park green space and different travel modes of residents,the park green space can be reached.Sexual analysis,the map of the accessibility of park green space in Nanchang City was obtained.Again,combined with the pedestrian accessibility data of Nanchang Park Green Park,the park area and the population data of each street,the service population ratio of each street in Nanchang City was calculated.The service area ratio,that is,the service efficiency of park green space in Nanchang City,and the service efficiency data of park green space in Nanchang City,using the Lorenz curve and location entropy method to analyze the overall fairness of park green space;finally,the combination of park green space in Nanchang City The three indicators of achievement,service efficiency and fairness propose an optimization strategy for park green space in Nanchang.Research indicates:(1)The accessibility of park green space in Nanchang City is poor.The Shajing Street and Fengzhouzhou Management Offices in Donghu District,Xihu District and Honggutan New District have high accessibility under five modes of transportation.The other areas have large internal differences under walking and bicycle travel modes.The per capita park green area in Nanchang City is 14.0 m~2 is higher than the national average of 13.5 m~2;large-scale comprehensive parks are more distributed,but the waters are wider;the green areas and community parks on the street are smaller and the spatial distribution is not balanced;the road traffic network in Nanchang is relatively perfect,but the overpass And the underground passages are less distributed and uneven;the water network densely extends the time for the citizens to reach the park green space,thus affecting the accessibility of the park green space.(2)The service efficiency of park green space is not balanced.The results show that the population with dense population distribution in Nanchang has better accessibility and better service efficiency.The streets with good service efficiency in Nanchang are Park Street,Yinshi Lake Management Office,Shajing Street,Dunzitang Street,Xihu Street,Dongjiayao Street,etc.Streets with poor service efficiency are Shengmi Town,Changdong Town,Luojia The town,Maqiu Town,Fenghuangzhou Management Office,Taohua Town and other streets;service efficiency as a whole is distributed in a ring,from the center to the periphery,service efficiency is declining.(3)Nanchang City Park Greenland has poor fairness and serious polarization.The park green space service Gini coefficient is as high as 0.42,and the park green space service gap is relatively large,which is relatively unfair.The location entropy method is used to obtain 58%street location entropy anomaly in Nanchang City,which indicates that the population and park green space distribution space is unreasonable.(4)The service level of urban park green space is related to the happiness,acquisition and security of urban residents.The service level of park green space can be optimized by optimizing road traffic network,improving urban green space construction,and guiding Nanchang land use planning.