勢力圏設定に関する一考察--岡山県を例として

スポンサーリンク

概要

• 論文の詳細を見る

• The formula for delimiting theoretical tributary areas of central places has been improved by O. Tuominen, S. Godlund et al. since first studied by W.J. Reilly. Moreover, by the mutual comparison between many centrality-indices, M. Nishimura has found that the strength of two central places are directly proportional to 'the values of retail sales - the values of retail food sales' and inversely proportional to the square of the distances from two central places.The objective of this paper is to find the mutual discrepances between theoretical tributary areas derived from such a method and trade areas of higher order and bus traffic areas in Okayama Prefecture as a case study, and to verify what reasons such discrepances are based on.While Okayama and Tsuyama as higher order centres both have wide theoretical tributary areas, the higher order centres from the neighbouring prefectures such as Himeji, Fukuyama, Yonago and Kurayoshi penetrate their own tributary areas into the marginal area in fig. 2. Moreover, lower order centres such as Kurashiki, Ibara and so on have smaller theoretical tributary areas. Occasionally theoretical tributary areas of higher order centres rise again beyond ones of lower order centres on the opposite sides.However, except for Saidaiji and Soja, lying at the distances of 11 and 20km from Okayama respectively, such a pattern can not make its appearance in the figure of trade areas (fig. 4. b. c.). For example, the trade area of Takahashi contacts directly the one of Niimi without penetrating that of Okayama; the trade area of Fukuyama does not exist in the southwestern part. In these areas few bus services radiating from Okayama and Fukuyama operate but most of them radiate from the neighbouring lower order centres.The fact that the inhabitants in the trade area of a lower order centre depend on the centre more strongly than its own inhabitants, can not be shown also in the figure of theoretical tributary areas. For example, the inhabitants of Takahashi are supplied goods and services of higher order from the city at the rate of about 45 per cent, while the inhabitants of Matsubara village, 8km from Takahashi, are supplied goods and services of higher order at the rate of about 90 per cent (fig. 5).It is obvious that the inhabitants of lower order centres themselves maintain a higher standard of living and the wider living areas than those of their trade areas. But, another factor is that bus service between the lower order centres and the higher order centres on which they depend is better as compared with that between the lower order centres and their tributary areas.Therefore, it is important for delimiting theoretical tributary areas to correctly estimate "accesility to a centre" by considering not only the distance but also the frequency of bus service on every road.Using bus service as method of delimiting tributary areas is of value, for sometimes bus traffic areas can be better superimposed on trade areas than theoretical tributary areas, though they, especially of smaller centres, are sometimes disturbed by intervening of occasional factors, and by the effects of railways; but the author thinks that it is more important to further improve the formula for the studies of tributary areas of central places.

• 人文地理学会の論文

著者

• 森川 洋

  大分大学教育学部

関連論文

• IV 地理のフレーム・ワークに対する意見(第1部 フレーム・ワークに対する専門学者の意見,共同研究「社会科における総合的思考の構造(フレーム・ワーク)の検討」)
• 勢力圏設定に関する一考察--岡山県を例として
• 中心地の階層性と都市の規模別分布

スポンサーリンク