A Study On The Urban Residential Land Intensive Use With The Aim Of Function Balance

Land intensive use is always an important principle of urban land utilization in China. Residential land intensive use is closely linked to residents'life. The development course of urban residential land use in developed countries has gone through the following stages: that is from function composite to single function, and then back to composite function again. Although China's urban residential land use is showing the trend that to be gradually integrated with the international practices, developers, with the aim of pursing the maximization of economic benefits, haven't completely designed the function of residential areas, which not only leads to such problems as the residential carrying functions tending to be single, residential type being drab, living quality being low and so on, but also makes it impossible for the residential areas to effectively meet reidents' diverse needs. Whether these problems can be solved effectively and how to solve them, not only depend on the level of urban residential land intensive use (URLIU) in the future, but more depends on land use decision makers and performers:government and developers' design, innovation and normalization on the pattern of land intensive use. Based on this, the study, starting from the target of function balance, attempts to research URLIU.Firstly, this study introduced the basic theory of URLIU with the aim of function balance. The results showed that'Compact City'and'Smart Growth' theory established a foundation of pattern selection of URLIU while centralization economic theory explained dynamics mechanism of market of URLIU with the aim of function balance; system theory offered important premise and basis for research on core problems such as evaluation of URLIU level, analysis of affecting factors, system optimization; traffic cost minimization theory, interchange theory, migration behavior theory and humanism ecological theory designated the demand orientation of residents.Secondly, the indexes for evaluation of URLIU level has been constructed based on the structure-function-benefit principle in this study; a multilevel grey fixed weight-clustering model combining grey fixed weight-clustering and AHP is deduced, and a positive case study is made with 21 samples in Haikou City, the results of which basically corresponded with actual situation. So the indexes established and research methods used in this study can accurately evaluate the level of URLIU to a certain extent.Thirdly, the results of theoretical analysis show that not only the general affecting factors including demographic factors, economic factors, technical factors and institutional factors influence URLIU, some particular factors such as change of residents'need, balance between information costs and transportation cost and other regional factors also affect it. The results of positive case study of Haikou City show that residential land grade, income level of living people, building height, application of advanced architecture technology, local residents proportions, occupancy, completed years, the utilization status of underground space and housing properties are the main influencing factors, which all have positive effect except local residents proportions and occupancy in that city.Fourthly, system dynamics model of URLIU has been constructed from microcosmic angle, and samples data is used to simulate, analyze and predict, the result of which shows that URLIU in search of a single function goes against the continued stability of the system while pursuing multi-function balance goal makes it to the contrary.Fifthly, the support system of URLIU under the goal of function balance has been analyzed theoretically. It is found that URLIU under the goal of function balance is not an independent system, which requires many kinds of support such as urban planning, urban land use system, residents'value idea, advanced technology, human resources and so on.