大都市郊外部における緑地管理及び木質バイオマス利用によるCO2固定量/排出削減量の推定

抄録

Confronted with global climate change and steadily rising energy costs, the formation of a “Low Carbon Society” has become imperative. In this endeavor, green space maintenance and subsequent utilization of harvested biomass has an important role to play. Green space maintenance serve to fix carbon (CO2), while woody biomass provides an essentially carbon neutral alternative energy source. In this study, we estimated the amount of carbon fixation and reduction in Kashiwa city, a suburban area of Tokyo, Japan based on three maintenance scenarios; a) “carbon fixation”, b) “biomass utilization and carbon fixation”, and c) “intensive biomass utilization”. Since various types of biomass resources are found in suburban areas, we assumed a mixed biomass utilization scenario which takes advantage of scale and enables cost-savings. Our results indicate that a total of 6,000-6,500 CO2 - t/yr could be fixed and reduced. In addition, we found that the different maintenance scenarios had negligible effect on the outcomes. The results of this research provide critical insight into how green space maintenance planning might not only enhance carbon fixation, but also reduce carbon emissions if appropriate woody biomass utilization methods can be implemented.