Intensive Use Solve Land Supply And Demand Contradiction SD Analysis

China in society economy fast development period, construction of land use supply and demand the contradiction in particularly explicit, domestic so many scholars try using several methods study of how can remission that contradiction, but land use supply and demand antinomy influencing factors each other staggered, so to now is not scholars proposed a relatively and general and authority solutions, determined which factors effect is more important role. Associated land intensive use concept is presented, a study of intensive use of urban land has become defuse development land use supply and demand contradictory major means. some achievements have also been made in china expert from economize intensive land use of angle embarks to analyzed the supply and demand contradictions, but in most cases it is used on qualitative analysis and only considering the local influence factors, between the local and global relationship starting with. in this paper we can try the application of system dynamics model to the"land supply and demand"and city total intensive degree as one of system considered, based on fully analyzing factors with system mutual influence relationship then, construction of land supply and demand with city overall intensive degree system dynamics model of. Construction of model when this paper taken into consideration supply and demand affections factors in social and economic, also take development land use to type is representative use type: Profit-oriented Land,Industrial Land to be model analysis. Analysis of these two types of land on the reason: one is that our present industrial land USES or allocated, the degree of mercerization and low in most cities in china industrial land intensive use is the low level of land; Second, profit-oriented land by mercerization of earlier is a way of land, Its action, hang a higher percentage of large and medium-sized cities in our country land use types Is the relatively high degree of intensive land use, These two types of land can be used as a city of intensive construction land use.Study using system dynamics analysis of urban land supply and demand,The market demand,Urban land intensive use several factors and the relationship between construction land supply, will the city"General intensive degree"as the urban construction land supply control valves. Establish indexes and between supply and demand linear regression, curve and linear interpolation relationship, Simulation of change, eventually determine 28, One in three state variables.Through the model simulation, model involve the urban construction land and profit-oriented land, industrial land in the supply and demand of each year Through the analysis of the urban construction land supply by urban land reserves, urban construction land supply and demand, the overall urban intensive this several indicators variables together, construction land supply, in reserve enough cases by construction land supply and demand of urban poor decisions and general intensive present parabola relation.