A Study On Chinese Extra Large City Of The Layout Pattern For Urban Green Space System Planning

In recent years,China has entered the stage of urbanization rapid development along with the high speed development of society. Relatively, environmental problem has also increased day by day. As the urban green space system which has the function of improving the environment, it becomes the effective way of solving such kind of problem and a reasonable layout pattern can make it perform its ecological function effectively.Nowadays, the theoretical frame structure of domestic green space system has formed basically,but it holds the problems such as too wide and too shallow for theory research with superficial depth,and the research is far behind the degree of social concern. Therefore,we need more scientific, more reasonable theory of green space system planning at the moment.This thesis bring the organic evolution,a total new theory of urban green space system on the basis of summed up the theoretical research about urban green space system at home and abroad. Analyze the layout pattern and evolution direction of urban green space system under the guidance of the theory for green space system planning. At the same time,embark from six genes including driving mechanism, public policy,relationship between city and village,internal structure of city,using way of ecological resources,function of ecological green space to analyze the influence of six genes on layout pattern of urban green space system.Compare the layout pattern of urban green space system among six foreign cities--Boston, London,Moscow,Melbourne, Tokyo and Pyongyang. Pay more attention on layout pattern of green space system in different period among Beijing,Shanghai,Guangzhou,Nanjing,Chengdu,Wuhan and Shenzhen. And sum up their influence on layout pattern of urban green space system for each city.Get the conclusion that naturalness,dynamic,diversity,compound,integrity and hierarchy are the characters of layout pattern of urban green space system for Chinese mega-cities.The styles of layout pattern are ring-net radiation,combined with the pattern of city,the green core mode.And the developing trend of layout pattern is network,diversification, three-dimensional,city and village integration, regionalization,spatial uniform distribution and integrate the road and water.On this basis,use the organic evolution of urban green space system to guide Shanghai green space system implementation planning.Analyze the advantage and disadvantage of layout pattern of present green space system planning about Shanghai,and point out the changing principle for layout pattern of city green space system.Elaboration the change of layout pattern under the influence of organic evolution of urban green space system's six genes.At the same time,validate the scientific and rational of organic evolution of urban green space system through comparing the regional, functionality, ecology,entertainment, integrity and connection degree between two layout pattern of green space system planning.Finally,this thesis systematically describes the investigation fruit,creation point and shortcoming completely,and point our the investigate content and sections which needs perfection in the future.