A Study On The Evaluation Of Spatial Distribution Of Urban Green Space

Urban park green space is an important space guarantee for urban sustainable development,and it has important ecological,social and cultural functions.Since 1980 s,China has been in the city greenbelt area per capita,green rate,green coverage rate and area ratio index as the core indicators to guide the planning and construction of city green space system,can not be denied that the whole level of the index to a cer tain extent can really reflect the city greening,are comparable,but in the actual application but ignore the social justice of the city green space distribution pattern and green resource sharing,the lack of specific guidance of balanced distribution of city park space index,fair pay less attention to city park service function problem.At home and abroad in recent years,more and more research park distribution the accessibility,balance and fairness began to appear,these differences of results largel y from the analysis method,and method of operation is often not comparable,resulting in related research about the park no better applied to guide the construction of green space.In view of this,this paper attempts to evaluate from multi dimensional perspective,with the help of a series of classic and effective method,and the universal index of spatial distribution of the fairness of the overall evaluation of park green space.In view of the Shenzhen city of Nanshan District,the first regional level evaluation of the park green space is conducted.Then the demand index and traffic cost modification based o n spatial fairness second level evaluation of Nanshan District Park,the distribution of the elderly population census,the third level of evaluation to social justice special population in Nanshan District park.The innovation of this paper is to match the park service supply and demand degree evaluation and multi dimension in the city park,city park on the expression characterization of the spatial distribution of accessibility and fairness index in community scale quantization,which can compare the balance of park green area,horizontal comparison of equilibrium can also be more area of the park,reflecting the city construction of "people-oriented" and "social justice" concept.The results showed that:(1)it is feasible to evaluate function of accessibility and equity index into the city park,can effectively characterize and measure the degree of rationality of city park space layout;(2)the use of accessibility and equity indicators need to define the dimensions,scope and scale of the study,especially the data accuracy,so as to facilitate the longitudinal comparison of the study areas and the horizontal comparisons among the cities.