都市の緑地保全思潮に関する研究 (その4)

混迷期における保全論 (1)

抄録

1. Urbanization and Green Conservation
The Japanese economy entered the high growth rate period from the reconstruction period during 15years from the mid-1950's and many cities expanded rapidly during this period. However, thoughts and measures for green conservation did not grow at a fast rate during this period. Rather, priority was given to productivity of ecnomy and time passed while thoughts and measures on green conservation were still in a perplexed and confused condition.
The first feature of urbanization in the 1960's was construction of large-scale residential spaces and the method of development was such that high efficiency transformation from green space to residential space was left to the ability of technicians. Senri, Kohri, Tokiwadaira, Makomanai and Ohasa are new towns which were developed during this period but measures for green space wer not suffiicient in all of these.
The second feature is that new industrial cities and industrial belts were developed in the coastal areas from 1963.(next issue)
2. Industry and Highways, and Green Conservation
Historical parks and gardens have been lost by construction of industrial lands and municipal highways. In Yokohama, the Sankeien Garden wich commanded a view of the sea became isolated in the midst of industrial land. And in Osaka, the seabathing beach disappeared from Hamadera Park as a result of construction of industrial land by reclamation.
In Tokyo, the edge of Shirogane educational Nature Garden was cut off by construction of the Metropolitan Highway and also, plants in the garden have been damaged by automobile emission gas.
3. Laws Related with Green Conservation
The government enacted laws for presernation of trees and conservation of green space zones but the contents of these laws were only passive measures.