Abstract:

he spatial distribution of urban population is both led by selforganizing distribution factors such as employment,living quality and commuting distance,and restricted by the rules,regulations and policies made by the government.Therefore,except to expound the selforganizing mechanism and influencing factor with respect to population distribution,it is necessary to study the comprehensive influences on economy,society,resources and environment by population distribution,and furthermore to put forth a optimized pattern of population distribution.Based on the summarization of the theories about population distribution,this paper explored the mechanism and model of urban spatial population distribution.Some principles of appropriate population distribution were put forward as well,such as ecological restriction,industry extrusion,life agglomeration,benefit integration and actuality concern,which had applied to building an optimization model of population distribution by random and objective function algorithm.Then taking Wuxi city as an example,based on collecting abundant data of population,economy,resources and environment,the spatial suitability assignment of urban ecological conservation,production benefit and life value was worked out.And at last by operating the optimization model,the comparison and selection of the optimization distribution schemes offered a basis for the adjustment of Wuxi population distribution.

Key words: ecology and economyoriented appropriate population distribution, optimized population distribution, Wuxi City