Advantages of the Open Levee (Kasumi-Tei), a Traditional Japanese River Technology on the Matsuura River, from an Ecosystem-Based Disaster Risk Reduction Perspective

Large-scale disasters, such as hurricanes, cyclones, tsunamis, and forest fires, have caused considerable damage in recent years. This study investigated two case studies of discontinuous open levees (kasumi-tei), which are a traditional Japanese river technology, on the Matsuura River at sites Okawano Azame-no-se, evaluated advantages these from perspective ecosystem-based disaster risk reduction (Eco-DRR). These were conducted through literature surveys, flood observations, oral interviews. The systems both cases control utilizing ecosystem services. technology (the plain levee) served an effective Eco-DRR cases. Additionally, levee enhanced services sites, including not only capabilities, but also other Furthermore, offered substantial cost over their alternatives. results suggest that technologies may be strengthening Eco-DRR.