Abstract
As a preliminary investigation, the possibility of introducing housing water tanks to store rainwater for improving urban environment and disaster risk reduction was explored. Firstly, the effect for introducing housing water tanks to store rainwater and its evaluation indexes were examined in terms of quantification. As a result of several analysis, the validity of introducing housing water tanks to store rainwater was demonstrated, however the proposed formula and result of our evaluation still needs to be further considered due to many assumptions and simplification. [This abstract is not included in the PDF]
