抄録
In the recent housing community developments, it is desired to conserve the natural environment both for the conservation of ecological potentiality and for the improvement of habitability utilizing the natural environment. The purpose of this research is to establish a planning method for housing community which will be developed in the natural environment with less impacts from construction. For this purpose, it is essentially important to indicate the impacts of construction quantitatively. In this paper, it is mentioned that the potentiality of natural environment can be presented with the quantitative indicator, the vitality of tree which was developed to present the stress of environmental impact on trees. The measurements of the tree vitality for more than 700 of specified trees were carried out in the several different type of fields ; the undeveloped natural hill and the developed housing communities where different scale of earth works were done at the construction, and then relations between the values of the vitality of trees and the environmental conditions were analyzed with the quantification theory I. From the results of analysis, it was shown that the vitality of trees can be explained by some critical elements such as the natural landform, orientation, soil categories, earth work condition, land surface finish and so on, and furthermore, that an idea of predicting the tree vitalities after the development is possible.
