都市近郊里山における市民の管理にもとづく木質バイオマス発生量の推定

概要

論文の詳細を見る
Utilization of woody biomass as a carbon neutral energy source is recognized as one of important means of restoring maintenance of suburban satoyamas. The existing maintenance by local citizen groups should not be overlooked. This study set a suburban community in the Tokyo metropolitan area as a case study and estimated the amount of harvestable woody biomass from suburban satoyamas by local citizen groups. The standard units of harvestable woody biomass were determined by measuring arisings through the citizen maintenance. Then, the maintenance scenario covered whole satoyamas in a case study city was developed and the standard units were applied. The amount of harvestable woody biomass were then estimated and evaluated as a renewable energy resource. Our results showed that 999dry-t/yr of woody biomass were harvestable as whole years in the case study. It is estimated that the rate of the satoyamas districts where 10% and more of the heating demanded reaches 20%. Furthermore, in a number of the districts in the north area where many satoyamas still keep, it was calculated that the value exceeds 50%. Based on the results we conclude even though the amount of harvestable woody biomass from suburban satoyamas by local citizen groups already have the potential of the energy resource in a community, if those activities are positioned as a part of regional management, it can play more important parts in satoyamas conservation.