人口ポテンシャルについての一考察
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概要
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J. Stewart formed a conception of "population potential" by the analogy of Newton's law of universal gravitation. His theory which is formulated as p1p2/d is that the degree of mutual influence between two units of population is in inverse proportion to the distance between them. It is also proved in the U.S. that his idea is effective as to the analysis of other social phenomena.The present essay, in connection with J. Stewart's "population potential", deals with:(1) Verification of his theory in application to Japan.(2) Improvement of the computation method.(3) A regional unit in which his formula is applicable.(4) Comparison with the model of the ideal distribution of central places.(5) Relation with traffic.First, a simple and practical computation method was devised. This method was adopted in making detailed population potential diagrams covering several prefectures.These diagrams made it clear that population potential diagrams are of less validity in metropolises and their neighborhood where social and economical mobility is large, while they are of practical application not only in the analysis of relative density of population in closed regions such as basins, but in establishing the structure of concentric zone of a city and its zone of influence.The comparison of the population potential diagram with the model of the ideal distribution of cities suggested the possibility of the diagramatical presentation of regional characters.The population potential diagram classified accordidg to occupations was made to show relationship with urban function in a particular region. The last, but not the least important use of the population potential diagram is that it shows the closest relationship with the traffic and traffic distance between two regions. It was recognized that this relation will be better analized by the use of "income potential", that is, of the original population potential multiplied by the weight of differences of income.
- 人文地理学会の論文