Research On The Spatial Model Of Urban Nutrient Cycle Community Based On Analysis And Ratings

In recent years,a series of urban problems such as ecological environment destruction,material resource shortage and deterioration of human living environment caused by population growth and accelerated urbanization have to be solved urgently.At the same time,China’s urban development has entered the transition era of stock optimization,which should be strongly advocated to improve the sustainability and livability of urban development.Therefore,the exploration of ecologically sustainable and resource efficient recycling urban recycling community model is highly suitable for the current urban development requirements,which is of great significance to alleviate the existing urban problems,improve the urban living environment and promote sustainable urban development.In this context,the thesis aims to scientifically construct a new "nutrient cycle community" with nutrient cycle as the core clue and urban agriculture as the key strategy,integrate multidisciplinary fields,explore the metabolic mechanism of nutrient cycle and related ecological technology tools in urban communities through nutrient metabolism analysis,qualitative and quantitative combination,algorithm generation design and other methods,clarify the necessity and feasibility of building an urban nutrient cycle community,propose a new theoretical model of "nutrient cycle community" that integrates community living space,nutrient cycle system and urban agriculture.It aims to build a new paradigm of urban ecological community with closed nutrient cycle and integration of production and life.On the basis of qualitative research,the thesis introduces quantitative research methods into urban habitat space,explores the quantifiable interaction between community nutrient cycling and urban agriculture,and then investigates the equilibrium rationing relationship between nutrient supply and demand,urban agriculture and community space,and scientifically constructs a cyclic community equilibrium rationing model that integrates nutrient cycling system,urban agriculture and community habitat space under ideal conditions.On the basis of the spatial ratio research,combined with the algorithm generative design,a variety of urban nutrient cycle community spatial models that meet the conditions of nutrient balance rationing and integrate production and consumption are constructed.Finally,the scope of research is extended to the district level composed of multiple communities,and three types of joint cycles are proposed: multi-community complementary cycle,multi-community symbiotic cycle and multi-community self-circulation.Through the quantitative allocation of nutrient resources in the district,a multi-community complementary and symbiotic nutrient cycle network is constructed to promote the closed nutrient cycle in the district,which in turn promotes the sustainable development of the whole city.This research combines multidisciplinary content to explore a new nutrient cycle community model with closed nutrient cycle,integration of agriculture and living,and ecological sustainability,in order to provide theoretical supplement and practical reference for the construction of ecological community and the sustainable development of urban human settlement environment in China in the current period of rapid urban development and transformation.