Quantitative Indicators Research On Uniform Distribution Of Town Landscape Green Space

Based on the three common indicators of greening rate, green coverage ratio and park green land area per capita in the green land evaluation index system, taking the relationship between quantification and the comprehensive ecological benefit of green space distribution state as the breakthrough point, study the feasibility of introducing new quantitative indicators in the town landscape ecological construction from three aspects of the horizontal distribution of green space, the vertical structure of green space and the composite structure of green space, expecting to guide town landscape green space system planning and layout.Use the grid method to divide town built or planning area into several equal grid areas; extract computing methods, procedures and steps from the concepts of lorenz curve and gini coefficient in the socioeconomics subject. Study ways of enhancing ecological benefits of green spaces. Put forward the idea of research of town green space quantitative indicators in three aspects of the horizontal distribution of green space, the vertical structure of green space and the composite structure of green space:horizontal distribution indicator of green space, vertical structure indicator of green space and composite structure indicator of green space. Apply these three new indicators in the planning practice of three towns:Hezhuang town, Xuedian town and Lihe town in Xinzheng City, Henan. Complete the practice application of the three new indicators.The horizontal distribution index of green space, vertical structure index of green space and composite structure index of green space of Hezhuang town are0.23,0.15and0.70respectively; Xuedian town’s are0.22,0.40and0.25respectively; Lihe town’s are0.23,0.15and0.19respectively. The horizontal distribution indexes of green space of the three towns are all in the relatively average threshold range; the vertical structure indexes of green space of Hezhuang town and Lihe town are in the absolute average threshold range, while the vertical structure index of green space of Xuedian town is in the relatively average threshold range; the composite structure index of green space of Hezhuang town is in wide disparity threshold range, the composite structure index of green space of Xuedian town is in the transfer value range between reasonable relatively and wide disparity, the composite structure index of green space of Lihe town is in the absolute average threshold range.The results of the study mainly base on town planning, evaluating the green space distribution pattern and providing constructive guidance for town planning and construction on the macro level. Unreasonable green space distribution pattern can be adjusted in two aspects:on the one hand, adjust urban land properties of affiliated green space in land use planning; on the other hand, adjust urban land properties of pure green space in land use planning.The methods in this paper can be used universally including the evaluation of the system of green space, the evaluation of the construction status of the system of green space, the self-inspection of the town planning and construction and the supervision and comparison of the status of the town planning and construction. Organically combine the urban land use planning and green space system planning, improving the initiative of the green space system planning in the process of urban planning.