多自然型川づくりへのLCAの適用

抄録

In nature-friendly river works natural materials such as rocks, soil, plants, are utilized instead of concrete. As a result, carbon dioxide emission would be reduced. In this paper the reduction of CO₂ emission is estimated. Life cycle assessment (LCA) method is applied for this purpose. The estimation was made on a flood protection work and it showed that concrete is the largest source of the emission. Therefore nature friendly river works might be effective in reducing the emission. When rocks are utilized instead of concrete blocks, the result of LCA showed that the amount of reduction depends on the inclination of the levee and the distance of transportation.