Research On Layout Of Green Space System In Mountain Cities

Our country is a very mountainous one with a great ratio of mountain cities in terms of their distribution and quantity.The unique terrain and landform of mountain cities determines the unique natural ecological environment and landscape of mountain cities.However,resulting from the rapid development of urban areas,highly dense population,traffic congestion and heavy environmental pollution,the growing contradiction between human activities and ecological environment becomes more serious.Green space system is an indispensable part of city ecological environment.Green space system plays a great part in improving and optimizing city ecological environment,adjusting city climate,beautifying city landscapes,improving physical and mental health of the habitants,and disaster prevention and avoidance.With people's ever growing importance attached on city landscapes and city environmental problems,and people's ever growing need for recreation,building a green space system with a scientific and proper layout structure has become an important content of mountain city construction and sustainable development strategy.Mountain cities differ a lot from plain cities in terms of nature,ecological environment,and landscapes,which theoretically determine the difference of green space system between mountain cities and plain cities.With the globalization of information and economic integration,the individuality and characteristics of mountain city landscapes are disappearing gradually,and city landscapes are tending to be identical;hence the study on the layout of mountain city green space system will be of great realistic value.Based on a general review of the green space systems and layout structure of domestic and foreign cities and the status quo of mountain city green space construction,the thesis explores the layout of mountain city green space system.Besides,the thesis analyzes the importance of the proper layout of mountain city green space system,in particular the terrains and landscapes,climate, hydrology,soil and the like natural conditions,city layout structure,mountains and rivers,streets, skylines and the like special spatial patterns,and the influence of the same on city green space system layout.The core of the thesis is based on the characteristics of mountain cities' nature,city layout, spatial patterns,and combined with GIS spatial analysis techniques,exploring the layout methods of mountain city green space system from the aspects of ecological sensitivity,visual landscapes and recreation service,namely the green land system layout method based on ecological sensitivity,the green land system layout method based on visual landscapes and the green land system layout method based on recreation service radial,and discussing the strategies of green space protection and layout from the three layout methods.As for the characteristics of mountain cities and the functions of green land system,the thesis also raises four forms of mountain city green space system layout,namely the natural space-driven layout form,the landscape and ecology-driven green network layout form,the city structure-driven layout form and the green space function-driven layout form.Actually,there is no ever fixed pattern for popularization;every city can find its suitable green space layout form according to its own conditions.At the end part,the thesis takes the city green space system planning of Fengjie County as the example,combines the actual conditions of the typical mountain Fengjie County with the above theoretical methods,performs ecological sensitivity analysis,recreation service analysis and visual landscape analysis on the planned construction region of Fengjie County and explores the city green space system of Fengjie County based on satisfying the needs of city ecology,landscape and the recreation need of civics.