中小河川の改修手法の工夫による CO₂排出量の削減

抄録

The global warming issue has become a worldwide problem. Civil engineering industry should make an effort to the reduction of the gases. The purpose of this study is to clarify CO₂ emissions in a past river work, and figure out amount of CO₂ emission cuts by devising construction methods in bank protection and planning concepts in river works. About the construction methods, it was calculated CO₂ emissions in concrete bank protection, multi-natural type bank protection, and soil bank protection. The result shows that multi-natural type bank protection can reduce CO₂ emissions to 79% by compared to concrete one. In addition, CO₂ emissions of soil bank protection are extremely small. About the planning concepts, it was calculated CO₂ emissions of planning concepts in a river work repaired by the past planning concept and the planning concept under Nature-Oriented River Work. The result shows that Nature-Oriented River Work can reduce CO₂ emissions to 80% compared to the past work.