Although the 2011 tsunamis and researches have shown the limitation of hard coastal structures in extreme events, grey infrastructure such as seawalls has dominated. Concurrently, it is inevitable to consider climate change and sea level rise with further increase of natural disasters. To tackle these issues, hybrid infrastructure, which combines grey and green components, has received growing interest. Green infrastructure (i.e., coastal forests) has multiple benefits: wind mitigation, species richness and recreational uses. However, there is little recognition about hybrid infrastructure.
Therefore, our study focuses on the quantitative analysis of people’s preference towards grey, green and hybrid infrastructure in coastal zones in terms of the intensity of seawalls and ecosystem services of coastal forests using choice experiments. These data were collected by the Internet surveys from coastal residents in Japan and analyzed to understand their perceptions of hybrid approach.
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