Study On The Layout Optimization Of Urban Park Green Space In Fuzhou

With the rapid development of cities,the contradiction between ecological environment and urban construction is becoming more and more obvious.Urban renewal is faced with the challenges of shortage of land resources,fragile environment,traffic congestion and deterioration of human living environment.It is an important task to find a balance between urban development and ecological environment.As a public place to beautify the city's appearance,maintain ecological benefits and relieve people's mental pressure,urban parks play an important role in urban development.At present,most of the planning of urban parks in our country lags behind the overall planning of the cities and is usually laid out according to the direct service radius or the qualitative planning.less consideration of the practical factors such as the time of the residents arriving in the park green space and the condition of urban roads,lack of experience in the accessibility and space suitability of urban park green space.Taking the main urban area of Fuzhou as the research object,through the field investigation and the high resolution image of Fuzhou city,using GIS to extract the information of Fuzhou urban park green space,the park green space area,population density,road network density and shape index are selected to study the accessibility of urban park green space,realizing the park green space service level evaluation in the study area,and on the basis of urban park green space layout optimization strategy is proposed.The main research results are as follows:(1)The number of urban parks in the study area is 43,and the total area of the park is 1103.84 hm2.Among them,there are 10 municipal comprehensive parks,4 regional comprehensive parks,7 community parks,13 special parks,3 street green Spaces and 6 strip parks.Most parks are located in Gulou district and Cangshan district.The number of parks in Jinan district is at least 5.(2)Park green space area,population density,road network density and shape selection index as the research of the influencing factors of urban park green space accessibility,and the correlation of urban park green space accessibility there exist certain differences.In terms of urban park green area service area,the correlation between it and the four factors are in turn shape index>population density>park green area>road network density.Park green space area and shape index are positively correlated with 0.2075 and 0.2046,respectively,and the population density is significantly negatively correlated,and the fitting degree is 0.5178;the density of road network is weakest and the fitting degree is 0.0684.Based on the.above analysis,the model of urban park green space service area is constructed:Y1=-12.255+0.688X1-0.14X2+1429.871X3+43.939X4(R2=0.421)where,Y1 represents the service area of park green space model,X1 represents the area of park green space,X2 represents population density,X3 represents the density of road network,and X4 represents the shape index.(3)In terms of urban park green area service efficiency,the correlation between it and the four factors are in turn park green area>road network density>shape index>population density.There is a significant positive correlation between the park green area and the fitting degree of 0.5198,while the population density,the road network density and the shape index are weakly correlated with the three,and the fitting degree is 0.007,0.1668 and 0.0414 respectively.Based on the above analysis,the model of urban park green space service area is constructed:Y2=30.157-0.149X1-0.01X2+59.084X3-3.368X4(R2=0.163).where,Y2 represents the park green space service model.(4)The area ratio of green space in Fuzhou urban park is 33.74%,and the service population is 43.18%.Under the conditions of different parks,the efficiency of green space service in urban parks is in turn the street green space>community parks>regional comprehensive park>ribbon park>the theme park>municipal comprehensive park;Under different administrative conditions,the efficiency of green space service in urban parks is in turn Taijiang administrative district>Gulou administrative district>Jinan administrative district>Cangshan administrative district.(5)On the basis of Fuzhou urban park green space of the existing problems and the lack of layout planning,on the type of urban park with different properties and different administrative region shall be a condition,according to the development degree of each region,the status of the park,the distribution of the population and the actual situation of the road,the optimum plan of the layout of the urban park green space is put forward respectively.