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DEDUCING ACTUAL CONVERSION OF URBAN AGRICULTURAL LAND USING PLOT SIZE, STREET WIDTH, AND NUMBER OF SIDES FACING STREETS AS INDEXES

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Other Title
  • 区画規模と接道街路の幅員及び接道面数を指標とした都市農地の転用実態の解明
  • 区間規模と接道街路の幅員及び接道面数を指標とした都市農地の転用実態の解明 : 世田谷区烏山地域を対象として
  • クカン キボ ト セツドウ ガイロ ノ フクイン オヨビセツドウメンスウ オ シヒョウ ト シタ トシ ノウチ ノ テンヨウ ジッタイ ノ カイメイ : セタガヤク カラスヤマ チイキ オ タイショウ ト シテ
  • -Observations in Karasuyama, Setagaya Ward-
  • -世田谷区烏山地域を対象として-

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Abstract

<p> The study explores the characteristics of actual conversion of partially surviving agricultural lands using three indexes, namely, plot size, street width, and number of sides facing streets. Initially, the uses of plots for 2016 were compared with agricultural lands in 1983. Furthermore, the actual conversion of all agricultural lands through analysis of the uses in 2016 using the three indexes before conversion was investigated. Second, the actual condition of converted plots partially retained as agricultural lands and their characteristics was compared with the actual conversion of all agricultural lands.</p><p> The study finds 816 plots in 2016 that correspond to 133 plots of partially surviving agricultural lands and identified 17 uses, which is lower than the case of 359 plots of all agricultural lands. Regarding uses after conversion of agricultural lands, the larger the plot size, the higher the ratio of independent housing in 2016 with a dispersion of ratio compared with that in all agricultural lands. In addition, the ratio of office buildings to parking lots is high in terms of agricultural lands connected to area major streets in 1983, whereas the ratios of commercial, warehouse, and transportation-related facilities are low. Moreover, the ratio of streets for partially surviving agricultural lands is lower than that for all agricultural lands in terms of agricultural lands away from streets, which indicates that the ratio of conversion to streets was low.</p><p> The number of plots in 2016 included in one plot of agricultural land in 1983 for partially surviving agricultural lands is lower than those for all agricultural lands. Conversely, the number of types of uses for partially surviving agricultural lands is higher than those for all agricultural lands, the degree of mix of use after conversion of agricultural lands is considered high for partially surviving agricultural lands. In contrast to all agricultural lands, the larger the street width, the more the number of plots for partially surviving agricultural lands.</p><p> The findings leads to the following characteristics of actual conversion of partially surviving agricultural lands:</p><p> i. The ratio of conversion to independent housing is dependent on plot size.</p><p> ii. The ratio of conversion to commercial, warehouse, and transportation-related facilities is low in terms of agricultural lands connected to area major streets in 1983.</p><p> iii. The ratio of conversion to streets is low for agricultural lands away from streets in 1983.</p><p> iv. The number of plots and types of uses in 2016 included in one plot of agricultural land in 1983 is lower and higher, respectively, than those in all agricultural lands.</p>

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