気候変動適応策におけるソーシャル・キャピタルの役割

―沿岸域交通を対象に―

抄録

This paper presents a discussion of how social capital (SC) influences the behavior of coastal streetcar users with regard to climate change adaptation. A community network that can solve regional issues is recognized as important for implementing climate change measures. Such a community network is quantified in terms of SC. Hakodate City, Japan, was selected as a case study. Streetcar users were selected from three areas along streetcar routes. Each area has a different SC structure: bonding type, bridging type, and hybrid type. Questionnaires were used for investigations, and 381 valid samples were gathered. Logit modeling and structural equation modeling were used as analytical methods. Results showed that SC directly influenced protective behavior. Therefore, SC is presumed as a predominant factor in climate change adaptation ability. Moreover, citizens opt for self-help behavior by using inner community networks in bonding type areas. Finally, several recommendations are made to promote climate change adaptation behavior in terms of SC.