Research On Evaluation Of Urban Green Space System Planning Scheme

The ecological crises caused by the increasing industrialization and modernization are the top and most serious challenge for the whole world, restorating the disturbed ecological balance and rebuilding the human suitable environment have become an significant issue of all our human beings today. Urban green space system is one infrastructure in urban construction because it plays an important role in improving urban environment, meeting inhabitants' need for entertainment, organizing urban landscapes, beautifying the environment and avoiding disaster. However, because of the late start of researching on urban green space system in our country, there exist imperfections on the projects' research, formation, implementation and management, espscially the lack of scientific evaluation system. Consequently, projects are sometimes disjointed with implementations.On the basis of relevant concepts of urban green space system, firstly, the paper did contrast studies on the theory and practices of the urban green space system projects in domestic and abroad, then the current urban green space system projects and their problems in Shandong province were organized. Secondly, this paper discussed the construction of the quantitative analysis system of the urban green space system. Based on the principles of the quantitative analysis system, 17 indexes and evaluation classification were established from the standpoint of green quantity, green space layout, ecological landscape and evaluation which were determined and inspected with analytic hierarchy process, consequently quantitative analysis system of the urban green space system was established. Finally, the landscape system project in Jiancheng district, Jinan was quantitatively analysed with practical case.The main content and conclusion were as follows:Firstly the paper accessed to clear concepts of urban green space after inspecting a large number of literature. Through the contrast studies on the theory and practice of the urban green space system projects in domestic and abroad, several problems existed in present situation and the planning of our urban green space system were given focal analysis, then effective ways to make up the deficiency in practical work were provided based on the affordances of advanced theories and practices abroad.After understanding the theory and standards about urban green space system planning, this paper selected several green space system plannning schemes of some cities in Shandong province to make the qualitative analysis. And this paper focused the introduction in programming especially the content and features of programming directions and made a summary for the problems in the programming of urban green space system in Shandong province.Then this paper constructed the comprehensive evaluation system of urban green space system. Based on discussing the necessity and principles of constructing scientific evaluation system, this paper established 17 evaluation index and evaluation classification which were per capita area of park green space, ratio of green space, percentage of greenery coverage, the comprehensive park index owned by million people, rationality of plant configuration, accessibility of park green space, oxygen's green index, evenness of park green distribution, index of cutting the use of indicators of heat, the amount of fixing carbon and releasing oxygen, absorbing the harmful gases, the function of water conservation, vacuuming sluggish dust capacity, urban natural characteristics, the green landscape recreation attract degrees, the cultural value of the green landscape and so on in the aspects of planning green quantity, green space layout, ecological benefit and landscape evaluation. And this paper identified and tested the weight of each indicator through analytic hierarchy process. Then the comprehensive evaluation system of urban green space system was constructed.Finally comprehensive analysis and evaluation of Jinan urban green space system planning were made by the evaluation system of the urban green space system established with analytical hierarchy process. The results indicated that the plannning of Jinan urban green space system was at a higher level and the synthesis index was 0.7183. The result reflected the urban green space system plannning in Jinan City was reasonable as a whole and finally some recommendations were gived out.