Studies On The Close-to-nature Landscape Layout And Construction Model Of Urban Green Belt

As the important component of the urban forest and vitality basic establishment, urban green belt is playing a more and more important role in the sustainable development of the city. From the view of building the ecological forestry city and sustainable development, as to the environment problem of atmosphere pollution, water pollution, soil pollution, noise pollution and the construction problem of the urban green belt such as singleness of the vegetation, blankness of the landscape, lacking the relation of the city open space, relative insulation and the intensivism of management and protection, this paper applies relative theories and methods such as close-to-nature forestry, landscape ecology and forestry esthetics in the layout and construction research of the urban green belt. Its' aim is to discuss the construction problem of the urban green belt just like design idea, plan principle, space layout, function and management mode in order to fully bring into play the ecological, economic and social benefit of the green belt, which provide the reference of urban green belt's layout and construction in our country.First and important, on the basis of summarization of the domestic and international research, this paper brings forward the overall design idea and plan principle of the urban green belt according to the relative theories and methods so as to give a guidance about the layout and construction. Secondly, on the foundation of the patch- corridor-matrix model of the landscape ecology, the research from the macroscopical angle probes into space layout of the green belt through the analysis to the landscape elements and provides the framework of the "green patch+green corridor+ green network", which incarnates point-line-face ideas. By analysed the upright configuration of the green belt and trees collocation, the research puts forward kinds of building function modes of the landscape belt such as ecological tour model, ecological health model, ecological economy model, ecological culture model and ecological defend model. It emphasizes the technique of the combination of tree, shrub and herb and builds the close-to-nature community configuration like "natural, but artifical". In addition, making reference to the thought about close-to-nature forestry management, this paper have researched the transformation of management and protection mode from the intensivism to the coarse model. At last, combined with the practical analysis to construction of green belt in Beijing, this paper gives feasible policy advices so as to improve fully ecological benefit of urban green belt and maintain the city's ecological security.