Research on Growth Limit of Urban Space Based on the Stability of Ecosystem:A Case Study of Beijing

Being in some state of the ecological environment,the formation and development of the city are supported and restricted by ecological system and environmental capacity.In the background of land space strongly demanded which required by the production activities,people ignores the limitation of resources and vulnerability of environment.In the past 30 years,high speed industrialization and urbanization caused so many problems in China,such as disorderly development of land space,the deterioration of ecology and the environment,the enhancement of resources pressure.Therefore,it is very important for us to make sure the growth limit of urban space and construct the reasonable urban and rural land-use pattern,that we can easily understand the binding mechanism in the process of the urban expansion and carry out the city planning and land use planning work.The target of this article is to pursue relative optimization of regional living environment.From the perspective of city,through analyzing the land ecologic suitability evaluation,we have studied whether the ecological landscape unit is suitable for the development and utilization of human activities or not.Specifically,taking the city of Beijing for example,from the four aspects of the type of land use/land cover,terrain slope,ecological function and ecological value,we established the landscape process resistance evaluation system.Using the minimal cumulative resistance model and the spatial analysis tool of ArcGIS,we have got the distribution of minimal cumulative resistance of urban space growth in Beijing;At the same time,using the rules of the World City space structure,we try to determine the urban space growth limit and threshold value interval of Beijing,at a certain stage of economic development and level of production technology inputs.