Evaluation of eco-value of sustainable house in consideration of carbon stock effect in wooden material

在这项研究中，评估了崎玉县废旧木材回收设施的可能性。结果表明，每年的CO_2还原潜力为720kt·CO_2。其次，对崎玉县森林的防洪、水资源储备和二氧化碳吸收功能进行了评估，分别为430亿日元、362亿日元和96亿日元。此外，利用本研究建立的地理信息系统数据库，对熊本县引进水处理技术系统的情景进行了环境效益评价。结果表明，在人口密度在350人/平方公里以上的地区引入污水处理系统，在其他地区引入化粪池时，CO_2排放量最小，分别为472kt-CO_2和17.9t-CO_2/t-BOD。

In this study, the possibility of recycling facilities for waste wood in Saitama Prefecture is evaluated. As a result the CO_2 reduction potential is 720kt-CO_2 a year. Next, for the forest in Saitama Prefecture its functions of the flood control, water resource stock, and carbon dioxide adsorption are evaluated as 43 billion yen, 36.2 billion yen, and 9.6 billion yen respectively. In addition the GIS database constructed in this study is used for evaluation of the environmental efficiency in scenarios of introducing the water treatment technology system in Kumamoto prefecture. As a result, in the case of introducing sewage system to the area that population density is 350 (person/km2) or more and a septic tank to other areas, CO_2 emissions are smallest, 472kt-CO_2 and 17.9t-CO_2/t-BOD.