Research On The Ecological Model Of Urban Block-based On Urban Metabolism

With the acceleration of global urbanization,"urban diseases",such as environmental pollution,climate deterioration and resource waste,have emerged one after another,and the urban ecosystem has become disordered.In the 1970 s,the intervention of ecological theory made eco-cities become the key to deal with urban ecological crisis.Because of the influence of the biology and ecology to design discipline,people awareness of the city began to essentially changed,mainstream academic with biology "metabolism",the concept of urban ecological problems,so as to further promote the internal mechanism of urban ecosystem.The above three aspects constitute the spatial background and basis of the study of eco-city.The purpose of this paper was the perspective of resource metabolism,with typical urban function block as the research unit object,integrated the space and technology model of " space of Ecological Block ",Constructed metabolism model of the block scale.The thesis is divided into five chapters.First chapter,introduction,mainly elaborated the background,main content and the research purpose of the selected topic,analyzed topic research significance of the selected.Intergrated the development status of related theory and practice both domestic and overseas.Chapter2 construction based on resource circulation the understanding of the ecological system of city blocks,framework,based on the research of the relevant scientific theory foundation,based on the role of urban ecosystem and natural ecosystem relations and puts forward the concept of "urban ecosystem",according to city ecosystem properties and puts forward the structure of the urban ecological unit level,based on the constitute the basic unit of city function and form of blocks as the basic starting point,emphasis on concept,connotation and features of city blocks ecosystem characteristics.The third chapter,research the mechanism of resource circulation characteristics of city blocks,based on the attribute of urban ecological system and put forward on the basis of the principle of circulation,the water,energy and nutrient,garbage and other resources within the block ecological unit "input-transformation-reuse-output" metabolic process and construct the circulation flow diagram,based on appropriate technologies to establish resources metabolic support system.Chapter 4research on resource metabolism optimization and spatial ecology of urban districts.The four types of blocks that do not function are selected,and the appropriate model is established to calculate the material flow and path of resource metabolism in each type,and the metabolic settlement of water,nutrient and energy cycle respectively.In this paper,the relationship between resource metabolic factors,spatial morphological factors and infrastructure elements is discussed in the research of the resource potential and the introduction of ecological infrastructure.Based on the principle of resource metabolism,the theoretical model of "block space ecology" combining energy cycle,water cycle and garbage recycling is characterized by the combination of spatial form and ecological technology.The fifth chapter summarizes the research results of the thesis,and puts forward some deficiencies and further research prospects for the problems existing in the thesis.